HOLLOW STRUCTURAL SECTIONS
DIMENSIONS AND SECTION PROPERTIES
HSS Manufacturing Methods
The transformation of steel strip into hollow structural sections (HSS) is the result of a series of operations including forming,
welding and sizing. Currently three methods are being used in North America for the manufacture of HSS. These methods are
described below. Each method meets ASTM A-500 and CSA G-40.21-92 requirements for the the manufacture of HSS, and the sizes
listed in this brochure may be produced to either standard.
Electric Resistance Welding (ERW) Process
In the tube mill, flat steel strip (1) is formed continuously around its
longitudinal axis to produce a round tube. This is done by moving the
strip through a progressive set of rolls (2-6). The strip edges (7) are
heated by either high frequency induction or contact welding and then
forged together by weld rolls to create a continuous longitudinal weld
without the addition of filler metal. The weld seam (8) is then cooled
and processed through a set of sizing/shaping rolls which cold-form it
into a round (9), square (10) or rectangular (11) section.
5 6 7
4
3
2
1
8
9
Form-Square Weld-Square (ERW) Process
In the weld mill, driven forming dies progressively shape the flat strip
(1) by forming the top two corners (2) of the square or rectangular tube
in the initial forming station. Subsequent stations form the bottom two
corners (3) of the shape. No cold working of the sides of the shape is
performed, and the shape’s seam is welded by high-frequency contacts
when the tube is near its final shape and size. The welded tube (4) is
cooled and then driven through a series of sizing stations which qualifies
the tube’s final dimensions.
10
11
4
1
2
3
3
Submerged Arc Weld (SAW) Process
Two identical pieces of flat strip (1) are placed in a press brake and
formed into two identical halves (2) of a finished tube size. A backup bar
is tack welded to each leg of one of the half-sections (3). The two halfsections are fitted together toe-to-toe (4) and welded by the submerged
arc process to complete the square or rectangular section (5).
2
5
1
2
3
4
2
1
1
STI/HSS Member Companies
Bull Moose Tube Company
1819 Clarkson Road, Suite 100
Chesterfield, MO 63017
Telephone: (636) 537-2600
(800) 325-4467
Fax: (636) 537-5848
Columbia Structural Tubing
8735 N Harborgate ST
Portland, OR 97203
Telephone: (503) 737-1200
(877) 737-1202
Fax: (503) 737-1202
IPSCO Tubulars Inc.
P.O. Box 18, 2011 7th Avenue
Camanche, IA 52730
Telephone: (563) 242-0000
(800) 945-8936
Fax: (563) 242-9137
Prolamsa
(Mexico Headquarters)
Carretera a Colombia Km. 5.75
Escobedo, N.L.,
Mexico C.P. 45560
Tel +52 (81) 8154-0200
Fax +52 (81) 8901-1709
Prolamsa USA, Inc.
(U.S. Headquarters)
770 South Post Oak Lane
Suite 200, Houston, TX 77056
Tel (281) 494-0900
Fax (281) 494-0990
Southland Tube Inc.
P.O. Box 2425
Birmingham, AL 35201-2425
Telephone: (205) 251-1884
(800) 543-9024
FAX: (205) 251-1553
Maruichi American Corp.
P.O. Box 3187
11529 Greenstone Ave.
Santa Fe Springs, CA 90670
Telephone: (562) 903-8600
(800) 654-5495
Fax: (562) 903-8601
Please Note:
We’ve tried to make this brochure as comprehensive and factual as possible.
However, some information may have been updated since the time of printing.
Your HSS producer is your best source for up-to-date information.
OF NORTH AMERICA
Valmont Industries
(Structural Tube Division)
HWY 275, P.O. Box 358
Valley, NB 68064
Telephone: (800) 345-6825
Fax: (402) 359-4481
Vest, Incorporated
6023 Alcoa Avenue
Los Angeles, CA 90058
Telephone: (323) 581-8823
(800) 421-6370
Fax: (323) 581-3465
Welded Tube
111 Rayette Road
Concord, Ontario,
Canada L4K 2E9
Telephone: (905) 669-1111
(800) 565-8823
Fax: (905) 669-8570
FOREWORD
This publication presents tables of dimensions and section properties for rectangular, square, and round Hollow
Structural Sections (HSS). HSS with a maximum periphery of 64 inches are manufactured by the electric-resistance welding
(ERW) process. HSS with peripheries greater than 64 inches are manufactured by the submerged arc welding (SAW) process.
See HSS Manufacturing Methods inside front cover in this publication.
The dimensions, including nominal width, nominal depth, nominal diameter and nominal wall thickness are subject to
the permissible variations stipulated in ASTM A500 “Standard Specification for Cold-Formed Welded and Seamless Carbon
Steel Structural Tubing in Rounds and Shapes”.
With today’s manufacturing methods, HSS are produced with more precision than in the past. The strip used to produce
HSS is now ordered to thicknesses with tighter tolerances. As a result, ERW HSS manufactured to A500 will often have a wall
thickness close to the Specification allowable value.
In a change from past practice, section property data is now based upon the design wall thickness. The design wall
thickness, t, for ERW HSS is less than the specified nominal wall thickness. For SAW HSS, the design wall thickness, t, is equal
to the specified nominal wall thickness.The design wall thickness for each HSS size is included in the tabulated data.
The section property data based upon the design wall thickness, t, results in variations in the published area data that do
not exceed 3.50% of the data based upon the minimum permissible wall thickness stipulated in ASTM A500. This is consistent with the similar section property data published for hot rolled structural shapes and the manufacturing tolerances
associated with those products.
The section property data for rectangular and square ERW HSS are based upon outside corner radii equal to 2.0 times
the design wall thickness. The section property data for rectangular and square SAW HSS are based upon outside corner
radii equal to 3.6 times the design wall thickness for SAW sections with 5/8 inch nominal wall thicknesses; and 3.0 times the
design wall thickness for SAW sections with nominal wall thicknesses equal to 1/2 inch and 3/8 inch.
General availability information for each size of HSS manufactured to ASTM A500 Grade B is contained in The Steel Tube
Institute’s companion publication “Principal Producers and Capabilities”. Tables, summarizing the capabilities of principal
producers by specific size and wall thickness, are included for rectangular, square and round HSS.
NOTE: The more universal terms “Hollow Structural Section” and “HSS” are used in this publication to designate rectangular,
square and round structural steel tubing. These terms replace “structural tubing” and “pipe”, which had been used
previously. The round Hollow Structural Sections include typical “pipe” size diameters and wall thicknesses, as well as
typical HSS sizes.
The information presented in this publication has been prepared in accordance with recognized engineering principles and is for general information only.While it is
believed to be accurate, this information should not be used or relied upon for any specific application without competent professional examination and verification
of its accuracy, suitability, and applicability by a licensed professional engineer, designer, or architect.The publication of the material contained herein is not intended
as a representation or warranty on the part of The Steel Tube Institute of North America or of any other person named herein, that this information is suitable for any
general or particular use or of freedom from infringement of any patent or patents.Anyone making use of this information assumes all liability arising from such use.
Caution must be exercised when relying upon other specifications and codes developed by other bodies and incorporated by reference herein since such material may
be modified or amended from time to time subsequent to the printing of this edition.The Institute bears no responsibility for such material other than to refer to it and
incorporate it by reference at the time of the initial publication of this edition.
“Designs for
the 21st Century”
TABLE OF CONTENTS
PAGE
Dimensions and Section Properties of Rectangular HSS .................................................................................................2
Dimensions and Section Properties of Square HSS .......................................................................................................14
Dimensions and Section Properties of Round HSS .......................................................................................................18
NOMENCLATURE
b
C
D
h
I
Ix
Iy
J
r
rx
ry
S
Sx
Sy
t
Z
Zx
Zy
Nominal width minus 3 times the design wall thickness, t (in.)
Torsional shear constant of cross-section (in.3)
Outside diameter of round HSS (in.)
Nominal depth minus 3 times the design wall thickness, t (in.)
Moment of inertia of cross-section (in.4)
Moment of inertia of cross-section about the X-X axis (in.4)
Moment of inertia of cross-section about the Y-Y axis (in.4)
Torsional stiffness constant of cross-section (in.4)
Governing radius of gyration (in.)
Radius of gyration with respect to the X-X axis (in.)
Radius of gyration with respect to the Y-Y axis (in.)
Elastic section modulus (in.3)
Elastic section modulus about the X-X axis (in.3)
Elastic section modulus about the Y-Y axis (in.3)
Design wall thickness (in.)… “units added”
Plastic section modulus (in.3)
Plastic section modulus about the X-X axis (in.3)
Plastic section modulus about the Y-Y axis (in.3)
Y
DIMENSIONS AND SECTION
PROPERTIES OF RECTANGULAR HSS
X
X
Y
Nominal Size
in.
in.
in.
Weight
per
Foot
Wall
Thickness
t
Ib.
in.
b/t
h/t
Cross
Sectional
Area
Ix
Sx
rx
Zx
Iy
Sy
ry
Zy
Torsional
Stiffness
Constant
J
in.2
in.4
in.3
in.
in.3
in.4
in.3
in.
in.3
in.4
in.3
ft.2
X-X Axis
Y-Y Axis
Torsional
Shear
Surface
Constant
Area
C
Per Foot
32
x
24 x 5/8*
1/2*
3/8*
225.80
183.50
138.95
0.625
0.500
0.375
35.4
45.0
61.0
48.2
61.0
82.3
66.4
53.9
40.8
9880
8160
6250
617
510
391
12.2
12.3
12.4
733
601
458
6390
5280
4050
533
440
337
9.81
9.89
9.96
604
495
378
12600
10100
7670
913
739
560
9.01
9.12
9.17
30
x
24 x 5/8*
1/2*
3/8*
217.30
176.70
133.84
0.625
0.500
0.375
35.4
45.0
61.0
45.0
57.0
77.0
63.9
51.9
39.3
8480
7010
5380
565
468
359
11.5
11.6
11.7
668
548
418
6050
5000
3840
504
417
320
9.73
9.82
9.88
575
472
360
11400
9220
6990
854
692
524
8.68
8.79
8.84
28
x
24 x 5/8*
1/2*
3/8*
208.79
169.89
128.74
0.625
0.500
0.375
35.4
45.0
61.0
41.8
53.0
71.7
61.4
49.9
37.8
7210
5970
4580
515
426
327
10.8
10.9
11.0
605
497
379
5710
4730
3630
476
394
302
9.65
9.73
9.79
546
448
342
10300
8330
6320
796
645
489
8.34
8.45
8.51
26
x
24 x 5/8*
1/2*
3/8*
200.28
163.08
123.64
0.625
0.500
0.375
35.4
45.0
61.0
38.6
49.0
66.3
58.9
47.9
36.3
6060
5020
3860
466
386
297
10.1
10.2
10.3
545
448
342
5370
4450
3420
447
371
285
9.55
9.64
9.70
517
425
324
9240
7460
5660
737
598
453
8.01
8.12
8.17
24
x
22 x 5/8*
1/2*
3/8*
183.27
149.47
113.43
0.625
0.500
0.375
32.2
41.0
55.7
35.4
45.0
61.0
53.9
43.9
33.3
4680
3900
3000
390
325
250
9.33
9.42
9.49
458
378
289
4110
3420
2630
373
311
239
8.73
8.82
8.89
432
356
273
7150
5780
4390
621
504
383
7.34
7.45
7.51
22
x
20 x 5/8*
1/2*
3/8*
166.25
135.86
103.22
0.625
0.500
0.375
29.0
37.0
50.3
32.2
41.0
55.7
48.9
39.9
30.3
3530
2950
2280
321
269
207
8.51
8.60
8.67
379
313
240
3060
2560
1970
306
256
197
7.91
8.00
8.07
355
294
225
5400
4370
3330
514
418
318
6.68
6.79
6.84
* This size produced by the submerged arc weld (SAW) process
2
Y
DIMENSIONS AND SECTION
PROPERTIES OF RECTANGULAR HSS
X
X
Y
Nominal Size
in.
Weight
per
Foot
Wall
Thickness
t
in.
in.
Ib.
in.
b/t
h/t
Cross
Sectional
Area
Ix
Sx
rx
Zx
Iy
Sy
ry
Zy
Torsional
Stiffness
Constant
J
in.2
in.4
in.3
in.
in.3
in.4
in.3
in.
in.3
in.4
in.3
ft.2
X-X Axis
Y-Y Axis
Torsional
Shear
Surface
Constant
Area
C
Per Foot
20
x
18 x
5/8*
1/2*
3/8*
149.24
122.25
93.01
0.625
0.500
0.375
25.8
33.0
45.0
29.0
37.0
50.3
43.9
35.9
27.3
2590
2180
1690
259
218
169
7.69
7.78
7.85
307
255
196
2210
1850
1440
245
206
160
7.10
7.19
7.25
286
238
183
3960
3220
2450
417
340
259
6.01
6.12
6.17
20
x
16 x
5/8*
1/2*
3/8*
140.73
115.45
87.91
0.625
0.500
0.375
22.6
29.0
39.7
29.0
37.0
50.3
41.4
33.9
25.8
2360
1990
1540
236
199
154
7.55
7.65
7.72
283
236
181
1680
1410
1100
210
177
137
6.37
6.46
6.52
243
203
156
3280
2670
2040
368
301
229
5.68
5.79
5.84
20
x
12 x
5/8*
1/2
3/8
5/16
123.72
103.30
78.52
65.87
0.625
0.465
0.349
0.291
16.2
22.8
31.4
38.2
29.0
40.0
54.3
65.7
36.4
28.3
21.5
18.1
1890
1550
1200
1010
189
155
120
101
7.20
7.39
7.45
7.48
234
188
144
122
864
705
547
464
144
117
91.1
77.3
4.87
4.99
5.04
5.07
166
132
102
85.8
2030
1540
1180
997
271
209
160
134
5.01
5.20
5.23
5.25
20
x
8 x
5/8
1/2
3/8
5/16
110.36
89.68
68.31
57.36
0.581
0.465
0.349
0.291
10.8
14.2
19.9
24.5
31.4
40.0
54.3
65.7
30.3
24.6
18.7
15.7
1440
1190
926
786
144
119
92.6
78.6
6.89
6.96
7.03
7.07
185
152
117
98.6
338
283
222
189
84.6
70.8
55.6
47.4
3.34
3.39
3.44
3.47
96.4
79.5
61.5
52.0
916
757
586
496
167
137
105
88.3
4.50
4.53
4.57
4.58
20
x
4 x
1/2
3/8
5/16
76.07
58.10
48.86
0.465
0.349
0.291
5.6
8.5
10.7
40.0
54.3
65.7
20.9
16.0
13.4
838
657
560
83.8
65.7
56.0
6.33
6.42
6.46
115
89.3
75.6
29.3
23.8
20.6
1.68
1.73
1.75
34.0
26.8
22.9
195
156
134
63.8
49.9
42.4
3.87
3.90
3.92
18
x
12 x
5/8*
1/2*
3/8*
115.21
95.03
72.59
0.625
0.500
0.375
16.2
21.0
29.0
25.8
33.0
45.0
33.9
27.9
21.3
1450
1240
971
161
138
108
6.55
6.67
6.75
199
168
130
783
668
524
131
111
87.3
4.81
4.89
4.95
152
127
98.6
1740
1430
1100
18
x
6 x
5/8
1/2
3/8
5/16
1/4
93.34
76.07
58.10
48.86
39.43
0.581
0.465
0.349
0.291
0.233
7.3
9.9
14.2
17.6
22.8
28.0
35.7
48.6
58.9
74.3
25.7
20.9
16.0
13.4
10.8
923
770
602
513
419
103
85.6
66.9
57.0
46.5
6.00
6.07
6.15
6.18
6.22
135
112
86.4
73.1
59.4
158
134
106
91.3
75.1
52.6
44.6
35.5
30.4
25.0
2.48
2.53
2.58
2.61
2.63
61.0
50.7
39.5
33.5
27.3
462
387
302
257
210
* This size produced by the submerged arc weld (SAW) process
3
58.7
47.6
41.2
243
200
153
4.68
4.79
4.84
109
89.9
69.5
58.7
47.7
3.83
3.87
3.90
3.92
3.93
Y
DIMENSIONS AND SECTION
PROPERTIES OF RECTANGULAR HSS
X
X
Y
Nominal Size
in.
in.
in.
Weight
per
Foot
Wall
Thickness
t
Ib.
in.
106.71
89.68
68.31
57.36
0.625
0.465
0.349
0.291
16.2
22.8
31.4
38.2
b/t
Cross
Sectional
Area
Ix
Sx
rx
Zx
Iy
Sy
ry
Zy
Torsional
Stiffness
Constant
J
in.2
in.4
in.3
in.
in.3
in.4
in.3
in.
in.3
in.4
22.6
31.4
42.8
52.0
31.4
24.6
18.7
15.7
1090
904
702
595
136
113
87.7
74.4
5.89
6.06
6.12
6.15
167
135
104
87.7
702
581
452
384
117
96.8
75.3
64.0
4.73
4.86
4.91
4.94
137
111
85.5
72.2
1470
1120
862
727
274
230
181
155
68.5
57.6
45.3
38.7
3.27
3.32
3.37
3.40
79.2
65.5
50.8
43.0
23.5
19.1
16.6
1.65
1.71
1.73
h/t
X-X Axis
Y-Y Axis
16
x
12 x 5/8*
1/2
3/8
5/16
16
x
8
x 5/8
1/2
3/8
5/16
93.34
76.07
58.10
48.86
0.581
0.465
0.349
0.291
10.8
14.2
19.9
24.5
24.5
31.4
42 8
52.0
25 7
20.9
16.0
13.4
815
679
531
451
102
84.9
66.3
56.4
5.63
5.70
5.77
5.80
129
106
82.1
69.4
16
x
4
x 1/2
3/8
5/16
62.46
47.90
40.35
0.465
0.349
0.291
5.6
8.5
10.7
31.4
42.8
52.0
17.2
13.2
11.1
455
360
308
56.9
45.0
38.5
5.15
5.23
5.27
77.3
60.2
51.1
14
x
12 x 1/2*
3/8*
81.42
62.39
0.500
0.375
21.0
29.0
25.0
34.3
23.9
18.3
678
534
96.9
76.3
5.32
5.40
116
90.0
536
422
89.3
70.4
14
x
10 x 5/8
1/2
3/8
5/16
1/4
93.34
76.07
58.10
48.86
39.43
0.581
0.465
0.349
0.291
0.233
14.2
18.5
25.7
31.4
39.9
21.1
27.1
37.1
45.1
57.1
25.7
20.9
16.0
13.4
10.8
687
573
447
380
310
98.2
81.8
63.9
54.3
44.3
5.17
5.23
5.29
5.32
5.35
120
98.8
76.3
64.6
52.4
407
341
267
227
186
14
x
6
x 5/8
1/2
3/8
5/16
1/4
3/16
76.33
62.46
47.90
40.35
32.63
24.73
0.581
0.465
0.349
0.291
0.233
0.174
7.3
9.9
14.2
17.6
22.8
31.5
21.1
27.1
37.1
45.1
57.1
77.5
21.0
17.2
13.2
11.1
8.96
6.76
478
402
317
271
222
170
68.2
57.4
45.3
38.7
31.7
24.3
4.77
4.84
4.91
4.94
4.98
5.01
88.7
73.6
57.3
48.6
39.6
30.1
14
x
4
x 5/8
1/2
3/8
5/16
1/4
3/16
67.82
55.66
42.79
36.10
29.23
22.18
0.581
0.465
0.349
0.291
0.233
0.174
3.9
5.6
8.5
10.7
14.2
20.0
21.1
27.1
37.1
45.1
57.1
77.5
18.7
15.3
11.8
9.92
8.03
6.06
373
317
252
216
178
137
53.3
45.3
36.0
30.9
25.4
19.5
4.47
4.55
4.63
4.67
4.71
4.74
73.1
61.0
47.8
40.6
33.2
25 3
* This size produced by the submerged arc weld (SAW) process
4
Torsional
Shear
Surface
Constant
Area
C
Per Foot
in.3
ft.2
215
166
127
107
4.34
4.53
4.57
4.58
681
563
436
369
132
108
83.4
70.4
3.83
3.87
3.90
3.92
27.4
21.7
18.5
150
120
103
50.7
39.7
33.8
3.20
3.23
3.25
4.73
4.80
104
81.2
990
762
154
118
4.12
4.17
81.5
68.1
53.4
45.5
37.2
3.98
4.04
4.09
4.12
4.14
95.1
78.5
60.7
51.4
41.8
832
685
528
446
362
146
120
91.8
77.4
62.6
3.83
3.87
3.90
3.92
3.93
124
105
84.1
72.3
59.6
45.9
41.2
35.1
28.0
24.1
19.9
15.3
2.43
2.48
2.53
2.55
2.58
2.61
48.4
40.4
31.6
26.9
22.0
16.7
334
279
219
186
152
116
83.7
69.3
53.7
45.5
36.9
28.0
3.17
3.20
3.23
3.25
3.27
3.28
47.1
41.1
33.6
29.2
24.4
19.0
23.6
20.6
16.8
14.6
12.2
9.48
1.59
1.64
1.69
1.72
1.74
1.77
28.5
24.1
19.1
16.4
13.5
10.3
148
127
102
87.7
72.4
55.8
52.6
44.1
34.6
29.5
24.1
18.4
2.83
2.87
2.90
2.92
2.93
2.95
47.0
38.3
33.2
Y
DIMENSIONS AND SECTION
PROPERTIES OF RECTANGULAR HSS
X
X
Y
Nominal Size
in.
in.
in.
Weight
per
Foot
Wall
Thickness
t
Ib.
in.
b/t
h/t
Cross
Sectional
Area
Ix
Sx
rx
Zx
Iy
Sy
ry
Zy
Torsional
Stiffness
Constant
J
in.2
in.4
in.3
in.
in.3
in.4
in.3
in.
in.3
in.4
in.3
ft.2
X-X Axis
Y-Y Axis
Torsional
Shear
Surface
Constant
Area
C
Per Foot
12
x
10 x 1/2
3/8
5/16
1/4
69.27
53.00
44.60
36.03
0.465
0.349
0.291
0.233
18.5
25.7
31.4
39.9
22.8
31.4
38.2
48.5
19.0
14.6
12.2
9.90
395
310
264
216
65.9
51.6
44.0
36.0
4.56
4.61
4.64
4.67
78.8
61.1
51.7
42.1
298
234
200
164
59.7
46.9
40.0
32.7
3.96
4.01
4.04
4.07
69.6
54.0
45.7
37.2
545
421
356
289
102
78.3
66.1
53.5
3.53
3.57
3.58
3.60
12
x
8
x 5/8
1/2
3/8
5/16
1/4
3/16
76.33
62.46
47.90
40.35
32.63
24.73
0.581
0.465
0.349
0.291
0.233
0.174
10.8
14.2
19.9
24.5
31.3
43.0
17.7
22.8
31.4
38.2
48.5
66.0
21.0
17.2
13.2
11.1
8.96
6.76
396
333
262
224
184
140
66.1
55.5
43.7
37.4
30.6
23.4
4.34
4.40
4.47
4.50
4.53
4.56
82 1
68.1
53.0
44.9
36.6
27.8
210
177
140
120
98.8
75.7
52.5
44.4
35.1
30.1
24.7
18.9
3.16
3.21
3.27
3.29
3.32
3.35
61.9
51.5
40.1
34.1
27.8
21.1
454
377
293
248
202
153
97.7
80.4
62.1
52.4
42.5
32.2
3.17
3.20
3.23
3.25
3.27
3.28
12
x
6
x 5/8
1/2
3/8
5/16
1/4
3/16
67.82
55.66
42.79
36.10
29.23
22.18
0.581
0.465
0.349
0.291
0.233
0.174
7.3
9.9
14.2
17.6
22.8
31.5
17.7
22.8
31.4
38.2
48.5
66.0
18.7
15.3
11.8
9.92
8.03
6.06
321
271
215
184
151
116
53.4
45.2
35.8
30.7
25.2
19.4
4.14
4.21
4.28
4.31
4.34
4.38
68.8
57.4
44.8
38.1
31.1
23.7
106
91.1
72.9
62.8
51.9
40.0
35.5
30.4
24.3
20.9
17.3
13.3
2.39
2.44
2.49
2.52
2.54
2.57
42.1
35.2
27.7
23.6
19.3
14.7
271
227
178
152
124
94.6
71.1
59.0
45.8
38.8
31.6
24.0
2.83
2.87
2.90
2.92
2.93
2.95
12
x
4
x 5/8
1/2
3/8
5/16
1/4
3/16
59.32
48.85
37.69
31.84
25.82
19.63
0.581
0.465
0.349
0.291
0.233
0.174
3.9
5.6
8.5
10.7
14.2
20.0
17.7
22.8
31.4
38.2
48.5
66.0
16.4
13.5
10.4
8.76
7.10
5.37
245
209
168
144
119
91.8
40.8
34.9
28.0
24.0
19.9
15.3
3.87
3.95
4.02
4.06
4.10
4.13
55.5
46.7
36.7
31.3
25.6
19.6
40.3
35.3
28.9
25.2
21.0
16.4
20.1
17.6
14.5
12.6
10.5
8.20
1.57
1.62
1.67
1.70
1.72
1.75
24.5
20.9
16.6
14.2
11.7
9.00
122
105
84.1
72.4
59.8
46.1
44.6
37.5
29.5
25.2
20.6
15.7
2.50
2.53
2.57
2.58
2.60
2.62
12
x 3 1/2 x 3/8
5/16
36.41
24.97
0.349
0.291
7.0
9.0
31.4
38.2
10.0
8.46
156
134
26.0
22.4
3.94
3.98
34.7
29.6
21.3
18.6
12.2
10.6
1.46
1.48
14.0
12.1
64.7
56.0
25.5
21.8
2.48
2.50
12
x
3
x 5/16
1/4
3/16
29.72
24.12
18.35
0.291
0.233
0.174
7.3
9.9
14.2
38.2
48.5
66.0
8.17
6.63
5.02
124
103
79.6
20.7
17.2
13.3
3.90
3.94
3.98
27.9
22.9
17.5
13.1
11.1
8.72
8.73 1.27
7.38 1.29
5.81 1.32
10.0
8.28
6.40
41.3
34.5
26.8
18.4
15.1
11.6
2.42
2.43
2.45
12
x
2
x 1/4
3/16
22.42
17.08
0.233
0.174
5.6
8.5
48.5
66.0
6.17
4.67
86.9
67.4
14.5
11.2
3.75
3.80
20.1
15.5
4.40
3.55
4.40 0.845
3.55 0.872
5.08
3.97
15.1
12.0
5
9.64
7.49
2.27
2.28
Y
DIMENSIONS AND SECTION
PROPERTIES OF RECTANGULAR HSS
X
X
Y
Nominal Size
in.
in.
in.
Weight
per
Foot
Wall
Thickness
t
Ib.
in.
b/t
h/t
Cross
Sectional
Area
Ix
Sx
rx
Zx
Iy
Sy
ry
Zy
Torsional
Stiffness
Constant
J
in.2
in.4
in.3
in.
in.3
in.4
in.3
in.
in.3
in.4
X-X Axis
Y-Y Axis
Torsional
Shear
Surface
Constant
Area
C
Per Foot
in.3
ft.2
10
x
8
x 1/2
3/8
5/16
1/4
3/16
55.66
42.79
36.10
29.23
22.18
0.465
0.349
0.291
0.233
0.174
14.2
19.9
24.5
31.3
43.0
18.5
25.7
31.4
39.9
54.5
15.3
11.8
9.92
8.03
6.06
214
169
145
119
91.4
42.7
33.9
29.0
23.8
18.3
3.73
3.79
3.82
3.85
3.88
51.9
40.5
34.4
28.1
21.4
151
120
103
84.7
65.1
37.8
30.0
25.7
21.2
16.3
3.14
3.19
3.22
3.25
3.28
44.5
34.8
29 6
24.2
18.4
288
224
190
155
118
66.4
51.4
43.5
35.3
26.7
2.87
2.90
2.92
2.93
2.95
10
x
6
x 5/8
1/2
3/8
5/16
1/4
3/16
59.32
48.85
37.69
31.84
25.82
19.63
0.581
0.465
0.349
0.291
0.233
0.174
7.3
9.9
14.2
17.6
22.8
31.5
14.2
18.5
25.7
31.4
39.9
54.5
16.4
13.5
10.4
8.76
7.10
5.37
201
171
137
118
96.9
74.6
40.2
34.3
27.3
23.5
19.4
14.9
3.50
3.57
3.63
3.66
3.69
3.73
51.3
43.0
33.8
28.8
23.6
18.0
89.4
76.8
61.8
53.3
44.1
34.1
29.8
25.6
20.6
17.8
14.7
11.4
2.34
2.39
2.44
2.47
2.49
2.52
35.8
30.1
23.7
20.2
16.6
12.7
209
176
139
118
96.7
73.8
58.6
48.7
37.9
32.2
26.2
19.9
2.50
2.53
2.57
2.58
2.60
2.62
10
x
5
x 3/8
5/16
1/4
3/16
35.13
29.72
24.12
18.35
0.349
0.291
0.233
0.174
11.3
14.2
18.5
25.7
25.7
31.4
39.9
54.5
9.67
8.17
6.63
5.02
120
104
85.8
66.2
24.1
20.8
17.2
13.2
3.53
3.56
3.60
3.63
30.4
26.0
21.3
16.3
40.6 16.2
35.2 14.1
29.3 11.7
22.7 9.09
2.05
2.07
2.10
2.13
18.7
16.0
13.2
10.1
100
86.0
70.7
54.1
31.2
26.5
21.6
16.5
2.40
2.42
2.43
2.45
10
x
4
x 5/8
1/2
3/8
5/16
1/4
3/16
50.81
42.05
32.58
27.59
22.42
17.08
0.581
0.465
0.349
0.291
0.233
0.174
3.9
5.6
8.5
10.7
14.2
20.0
14.2
18.5
25.7
31.4
39.9
54.5
14.0
11.6
8.97
7.59
6.17
4.67
149
129
104
90.1
74.7
57.8
29.9
25.8
20.8
18.0
14.9
11.6
3.26
3.34
3.41
3.44
3.48
3.52
40.3
34.1
27.0
23.1
19.0
14.6
33.4
29.4
24.3
21.2
17.7
13.9
16.7
14.7
12.1
10.6
8.87
6.93
1.54
1.59
1.64
1.67
1.70
1.72
20.6
17.6
14.0
12.1
9.96
7.66
95.7
82.6
66.5
57.3
47.4
36.5
36.7
31.0
24.4
20.9
17.1
13.1
2.17
2.20
2.23
2.25
2.27
2.28
10
x 3 1/2 x 3/16
16.44
0.174
17.1
54.5
4.50
53.6
10.7
3.45
13.7
10.3
5.89
1.51
6.52
28.6
11.4
2.20
10
x
3
x 3/8
5/16
1/4
3/16
1/8
30.03
25.46
20.72
15.80
10.71
0.349
0.291
0.233
0.174
0.116
5.6
7.3
9.9
14.2
22.9
25.7
31.4
39.9
54.5
83.2
8.27
7.01
5.70
4.32
2.93
88.0
76.3
63.6
49.4
34.2
17.6
15.3
12.7
9.87
6.83
3.26
3.30
3.34
3.38
3.42
23.7
20.3
16.7
12.8
8.80
12.4
11.0
9.28
7.33
5.16
8.27
7.30
6.18
4.89
3.44
1.22
1.25
1.28
1.30
1.33
9.73
8.42
6.99
5.41
3.74
37.8
33.0
27.6
21.5
14.9
17.7
15.2
12.5
9.64
6.61
2.07
2.08
2.10
2.12
2.13
10
x
2
x 3/8
5/16
1/4
3/16
27.48
23.34
19.02
14.53
0.349
0.291
0.233
0.174
2.7
3.9
5.6
8.5
25.7
31.4
39.9
54.5
7.58
6.43
5.24
3.98
71.7
62.6
52.5
41.0
14.3
12.5
10.5
8.19
3.08
3.12
3.17
3.21
20.3
17.5
14.4
11.1
4.69
4.24
3.67
2.97
4.69
4.24
3.67
2.97
0.786
0.812
0.837
0.864
5.76
5.06
4.26
3.34
15.9
14.2
12.2
9.74
11.0
9.56
7.99
6.22
1.90
1.92
1.93
1.95
6
Y
DIMENSIONS AND SECTION
PROPERTIES OF RECTANGULAR HSS
X
X
Y
Nominal Size
in.
in.
in.
Weight
per
Foot
Wall
Thickness
t
Ib.
in.
b/t
h/t
Cross
Sectional
Area
Ix
Sx
rx
Zx
Iy
Sy
ry
Zy
Torsional
Stiffness
Constant
J
in.2
in.4
in.3
in.
in.3
in.4
in.3
in.
in.3
in.4
in.3
ft.2
X-X Axis
Y-Y Axis
Torsional
Shear
Surface
Constant
Area
C
Per Foot
9
x
7
x 5/8
1/2
3/8
5/16
1/4
3/16
59.32
48.85
37.69
31.84
25.82
19.63
0.581
0.465
0.349
0.291
0.233
0.174
9.0
12.1
17.1
21.1
27.0
37.2
12.5
16.4
22.8
27.9
35.6
48.7
16.4
13.5
10.4
8.76
7.10
5.37
174
149
119
102
84.1
64.7
38.7
33.0
26.4
22.6
18.7
14.4
3.26
3.32
3.38
3.41
3.44
3.47
48.3
40.5
31.8
27.1
22.2
16.9
117
100
80.4
69.2
57.2
44.1
33.5
28.7
23.0
19.8
16.3
12.6
2.68
2.73
2.78
2.81
2.84
2.87
40.5
34.0
26.7
22.8
18.7
14.3
235
197
154
131
107
81.7
62.0
51.5
40.0
33.9
27.6
20.9
2.50
2.53
2.57
2.58
2.60
2.62
9
x
5
x 5/8
1/2
3/8
5/16
1/4
3/16
50.81
42.05
32.58
27.59
22.42
17.08
0.581
0.465
0.349
0.291
0.233
0.174
5.6
7.8
11.3
14.2
18.5
25.7
12.5
16.4
22.8
27.9
35.6
48.7
14.0
11.6
8.97
7.59
6.17
4.67
133
115
92.5
79.8
66.1
51.1
29.6
25.5
20.5
17.7
14.7
11.4
3.08
3.14
3.21
3.24
3.27
3.31
38.5
32.5
25.7
22.0
18.1
13.8
51.9
45.2
36.8
32.0
26.6
20.7
20.8
18.1
14.7
12.8
10.6
8.28
1.92
1.97
2.03
2.05
2.08
2.10
25.3
21.5
17.1
14.6
12.0
9.25
128
109
86.9
74.4
61.2
46.9
42.5
35.6
27.9
23.8
19.4
14.8
2.17
2.20
2.23
2.25
2.27
2.28
9
x
3
x 1/2
3/8
5/16
1/4
3/16
35.24
27.48
23.34
19.02
14.53
0.465
0.349
0.291
0.233
0.174
3.5
5.6
7.3
9.9
14.2
16.4
22.8
27.9
35.6
48.7
9.74
7.58
6.43
5.24
3.98
80.8
66.3
57.7
48.2
37.6
17.9
14.7
12.8
10.7
8.35
2.88
2.96
3.00
3.04
3.07
24.6
19.7
16.9
14.0
10.8
13.2
11.2
9.88
8.38
6.63
8.79
7.45
6.59
5.59
4.42
1.16
1.21
1.24
1.27
1.29
10.8
8.80
7.63
6.35
4.92
40.0
33.1
28.9
24.2
18.9
19.7
15.8
13.6
11.3
8.66
1.87
1.90
1.92
1.93
1.95
7
Y
DIMENSIONS AND SECTION
PROPERTIES OF RECTANGULAR HSS
X
X
Y
Nominal Size
in.
in.
in.
Weight
per
Foot
Wall
Thickness
t
Ib.
in.
b/t
h/t
Cross
Sectional
Area
Ix
Sx
rx
Zx
Iy
Sy
ry
Zy
Torsional
Stiffness
Constant
J
in.2
in.4
in.3
in.
in.3
in.4
in.3
in.
in.3
in.4
in.3
ft.2
X-X Axis
Y-Y Axis
Torsional
Shear
Surface
Constant
Area
C
Per Foot
8
x
6
x 5/8
1/2
3/8
5/16
1/4
3/16
50.81
42.05
32.58
27.59
22.42
17.08
0.581
0.465
0.349
0.291
0.233
0.174
7.3
9.9
14.2
17.6
22.8
31.5
10.8
14.2
19.9
24.5
31.3
43.0
14.0
11.6
8.97
7.59
6.17
4.67
114
98.2
79.1
68.3
56.6
43.7
28.5
24.5
19.8
17.1
14.1
10.9
2.85
2.91
2.97
3.00
3.03
3.06
36.1
30.5
24.1
20.6
16.9
13.0
72.2
62.5
50.6
43.8
36.4
28.2
24.1
20.8
16.9
14.6
12.1
9.39
2.27
2.32
2.38
2.40
2.43
2.46
29.5
24.9
19.8
16.9
13.9
10.7
150
127
100
85.8
70.3
53.7
46.0
38.4
30.0
25.5
20.8
15.8
2.17
2.20
2.23
2.25
2.27
2.28
8
x
4
x 5/8
1/2
3/8
5/16
1/4
3/16
1/8
42.30
35.24
27.48
23.34
19.02
14.53
9.86
0.581
0.465
0.349
0.291
0.233
0.174
0.116
3.9
5.6
8.5
10.7
14.2
20.0
31.5
10.8
14.2
19.9
24.5
31.3
43.0
66.0
11.7
9.74
7.58
6.43
5.24
3.98
2.70
81.9
71.7
58.7
51.0
42.5
33.1
22.9
20.5
17.9
14.7
12.8
10.6
8.27
5.73
2.64
2.71
2.78
2.82
2.85
2.88
2.92
27.4
23.5
18.8
16.1
13.3
10.2
7.02
26.6 13.3
23.6 11.8
19.6
9.79
17.2
8.58
14.4
7.21
11.3
5.65
7.90 3.95
1.51
1.56
1.61
1.63
1.66
1.69
1.71
16.6
14.3
11.5
9.91
8.20
6.33
4.36
70.3
61.1
49.3
42.6
35.3
27.2
18.7
28.7
24.4
19.3
16.5
13.6
10.4
7.10
1.83
1.87
1.90
1.92
1.93
1.95
1.97
8
x
3
x 1/2
3/8
5/16
1/4
3/16
1/8
31.84
24.93
21.21
17.32
13.25
9.01
0.465
0.349
0.291
0.233
0.174
0.116
3.5
5.6
7.3
9.9
14.2
22.9
14.2
19.9
24.5
31.3
43.0
66.0
8.81
6.88
5.85
4.77
3.63
2.46
58.5
48.5
42.4
35.5
27.8
19.3
14.6
12.1
10.6
8.88
6.94
4.83
2.58
2.65
2.69
2.73
2.77
2.80
20.0 11.7
16.1
9.94
13.9
8.81
11.5
7.49
8.87 5.94
6.11 4.20
7.78
6.62
5.87
4.99
3.96
2.80
1.15
1.20
1.23
1.25
1.28
1.31
9.64
7.88
6.84
5.70
4.43
3.07
34.3
28.5
24.9
20.8
16.2
11.3
17.4
14.0
12.1
9.97
7.68
5.27
1.70
1.73
1.75
1.77
1.78
1.80
8
x
2
x 3/8
5/16
1/4
3/16
1/8
22.37
19.08
15.62
11.97
8.16
0.349
0.291
0.233
0.174
0.116
2.7
3.9
5.6
8.5
14.2
19.9
24.5
31.3
43.0
66.0
6.18
5.26
4.30
3.28
2.23
38.2
33.7
28.5
22.4
15.7
9.56
8.43
7.12
5.61
3.93
2.49
2.53
2.57
2.61
2.65
13.4
11.6
9.68
7.51
5.19
3.72
3.38
2.94
2.39
1.72
0.776
0.801
0.827
0.853
0.879
4.61
4.06
3.43
2.70
1.90
12.1
10.9
9.36
7.48
5.30
8.65
7.57
6.35
4.95
3.44
1.57
1.58
1.60
1.62
1.63
8
3.72
3.38
2.94
2.39
1.72
Y
DIMENSIONS AND SECTION
PROPERTIES OF RECTANGULAR HSS
X
X
Y
Nominal Size
in.
in.
in.
Weight
per
Foot
Wall
Thickness
t
Ib.
in.
b/t
h/t
Cross
Sectional
Area
Ix
Sx
rx
Zx
Iy
Sy
ry
Zy
Torsional
Stiffness
Constant
J
in.2
in.4
in.3
in.
in.3
in.4
in.3
in.
in.3
in.4
in.3
ft.2
X-X Axis
Y-Y Axis
Torsional
Shear
Surface
Constant
Area
C
Per Foot
7
x
5
x 5/8
1/2
3/8
5/16
1/4
3/16
1/8
42.30
35.24
27.48
23.34
19.02
14.53
9.86
0.581
0.465
0.349
0.291
0.233
0.174
0.116
5.6
7.8
11.3
14.2
18.5
25.7
40.1
9.0
12.1
17.1
21.1
27.0
37.2
57.3
11.7
9.74
7.58
6.43
5.24
3.98
2.70
69.3
60.6
49.5
43.0
35.8
27.9
19.3
19.8
17.3
14.1
12.3
10.2
7.96
5.52
2.43
2.49
2.56
2.59
2.62
2.65
2.68
25.6
21.9
17.5
15.0
12.4
9.52
6.53
40.5
35.6
29.2
25.5
21.3
16.6
11.6
16.2
14.2
11.7
10.2
8.53
6.65
4.63
1.86
1.91
1.96
1.99
2.02
2.05
2.07
20.2
17.3
13.8
11.9
9.83
7.57
5.20
88.5
75.8
60.6
52.1
42.9
32.9
22.5
32.2
27.2
21.4
18.3
15.0
11.4
7.79
1.83
1.87
1.90
1.92
1.93
1.95
1.97
7
x
4
x 1/2
3/8
5/16
1/4
3/16
1/8
31.84
24.93
21.21
17.32
13.25
9.01
0.465
0.349
0.291
0.233
0.174
0.116
5.6
8.5
10.7
14.2
20.0
31.5
12.1
17.1
21.1
27.0
37.2
57.3
8.81
6.88
5.85
4.77
3.63
2.46
50.6
41.8
36.4
30.5
23.8
16.6
14.5
11.9
10.4
8.72
6.80
4.73
2.40
2.46
2.50
2.53
2.56
2.59
18.8
15.1
13.1
10.8
8.33
5.73
20.7 10.3
17.3
8.63
15.2
7.58
12.8
6.38
10.0
5.02
7.03 3.51
1.53
1.58
1.61
1.64
1.66
1.69
12.6
10.2
8.83
7.33
5.67
3.91
50.5
41.0
35.4
29.3
22.7
15.6
21.1
16.8
14.4
11.8
9.07
6.20
1.70
1.73
1.75
1.77
1.78
1.80
7
x
3
x 1/2
3/8
5/16
1/4
3/16
1/8
28.43
22.37
19.08
15.62
11.97
8.16
0.465
0.349
0.291
0.233
0.174
0.116
3.5
5.6
7.3
9.9
14.2
22.9
12.1
17.1
21.1
27.0
37.2
57.3
7.88
6.18
5.26
4.30
3.28
2.23
40.7
34.0
29.9
25.2
19.8
13.8
11.6
9.73
8.54
7.19
5.65
3.95
2.27
2.35
2.38
2.42
2.45
2.49
15.8
12.8
11.1
9.22
7.14
4.93
10.2
8.70
7.74
6.59
5.24
3.71
1.14
1.19
1.21
1.24
1.26
1.29
8.46
6.95
6.05
5.06
3.94
2.73
28.6
23.9
20.9
17.5
13.7
9.48
15.0
12.1
10.5
8.68
6.69
4.60
1.53
1.57
1.58
1.60
1.62
1.63
9
6.78
5.80
5.16
4.40
3.50
2.48
Y
DIMENSIONS AND SECTION
PROPERTIES OF RECTANGULAR HSS
X
X
Y
Nominal Size
in.
in.
in.
Weight
per
Foot
Wall
Thickness
t
Ib.
in.
b/t
h/t
Cross
Sectional
Area
Ix
Sx
rx
Zx
Iy
Sy
ry
Zy
Torsional
Stiffness
Constant
J
in.2
in.4
in.3
in.
in.3
in.4
in.3
in.
in.3
in.4
in.3
ft.2
X-X Axis
Y-Y Axis
Torsional
Shear
Surface
Constant
Area
C
Per Foot
6
x
5
x 3/8
5/16
1/4
3/16
24.93
21.21
17.32
13.25
0.349
0.291
0.233
0.174
11.3
14.2
18.5
25.7
14.2
17.6
22.8
31.5
6.88
5.85
4.77
3.63
33.9
29.6
24.7
19.3
11.3
9.85
8.25
6.44
2.22
2.25
2.28
2.31
13.8
11.9
9.87
7.62
25.5
22.3
18.7
14.6
10.2
8.91
7.47
5.84
1.92
1.95
1.98
2.01
12.2
10.5
8.72
6.73
48.1
41.4
34.2
26.3
18.2
15.6
12.8
9.76
1.73
1.75
1.77
1.78
6
x
4
x 1/2
3/8
5/16
1/4
3/16
1/8
28.43
22.37
19.08
15.62
11.97
8.16
0.465
0.349
0.291
0.233
0.174
0.116
5.6
8.5
10.7
14.2
20.0
31.5
9.9
14.2
17.6
22.8
31.5
48.7
7.88
6.18
5.26
4.30
3.28
2.23
33.9
28.3
24.8
20.9
16.4
11.4
11.3
9.43
8.27
6.96
5.46
3.81
2.08
2.14
2.17
2.20
2.23
2.26
14.6
11.9
10.3
8.53
6.60
4.56
17.7
14.9
13.1
11.1
8.76
6.15
8.87
7.46
6.57
5.56
4.38
3.08
1.50
1.55
1.58
1.61
1.63
1.66
11.0
8.94
7.75
6.45
5.00
3.46
40.3
32.8
28.4
23.6
18.2
12.6
17.8
14.2
12.2
10.1
7.74
5.30
1.53
1.57
1.58
1.60
1.62
1.63
6
x
3
x 1/2
3/8
5/16
1/4
3/16
1/8
25.03
19.82
16.96
13.91
10.70
7.31
0.465
0.349
0.291
0.233
0.174
0.116
3.5
5.6
7.3
9.9
14.2
22.9
9.9
14.2
17.6
22.8
31.5
48.7
6.95
5.48
4.68
3.84
2.93
2.00
26.8
22.7
20.1
17.0
13.4
9.43
8.94
7.57
6.69
5.66
4.47
3.14
1.96
2.04
2.07
2.10
2.14
2.17
12.1
9.90
8.61
7.19
5.59
3.87
8.65
7.47
6.66
5.70
4.55
3.23
5.77
4.98
4.44
3.80
3.03
2.15
1.12
1.17
1.19
1.22
1.25
1.27
7.28
6.03
5.27
4.41
3.45
2.40
23.1
19.3
16.9
14.2
11.1
7.73
12.7
10.3
8.91
7.39
5.71
3.93
1.37
1.40
1.42
1.43
1.45
1.47
6
x
2
x 3/8
5/16
1/4
3/16
1/8
17.27
14.83
12.21
9.42
6.46
0.349
0.291
0.233
0.174
0.116
2.7
3.9
5.6
8.5
14.2
14.2
17.6
22.8
31.5
48.7
4.78
4.10
3.37
2.58
1.77
17.1
15.3
13.1
10.5
7.42
5.71
5.11
4.37
3.49
2.47
1.89
1.93
1.97
2.01
2.05
7.93
6.95
5.84
4.58
3.19
2.75
2.52
2.21
1.80
1.31
2.75
2.52
2.21
1.80
1.31
0.759
0.784
0.809
0.835
0.861
3.46
3.07
2.61
2.07
1.46
8.42
7.60
6.55
5.24
3.72
6.35
5.58
4.70
3.68
2.57
1.23
1.25
1.27
1.28
1.30
10
Y
DIMENSIONS AND SECTION
PROPERTIES OF RECTANGULAR HSS
X
X
Y
Nominal Size
in.
in.
in.
Weight
per
Foot
Wall
Thickness
t
Ib.
in.
b/t
h/t
Cross
Sectional
Area
Ix
Sx
rx
Zx
Iy
Sy
ry
Zy
Torsional
Stiffness
Constant
J
in.2
in.4
in.3
in.
in.3
in.4
in.3
in.
in.3
in.4
in.3
ft.2
14.8
12.6
11.1
9.46
7.48
7.41
6.29
5.57
4.73
3.74
1.46
1.52
1.54
1.57
1.60
9.35
7.67
6.67
5.57
4.34
30.3
24.9
21.7
18.0
14.0
14.5
11.7
10.1
8.32
6.41
1.37
1.40
1.42
1.43
1.45
4.76
4.16
3.73
3.20
2.57
1.83
1.09
1.14
1.17
1.19
1.22
1.25
6.10
5.10
4.48
3.77
2.96
2.07
17.6
14.9
13.1
11.0
8.64
6.02
10.3
8.44
7.33
6.10
4.73
3.26
1.20
1.23
1.25
1.27
1.28
1.30
X-X Axis
Y-Y Axis
Torsional
Shear
Surface
Constant
Area
C
Per Foot
5
x
4
x 1/2
3/8
5/16
1/4
3/16
25.03
19.82
16.96
13.91
10.70
0.465
0.349
0.291
0.233
0.174
5.6
8.5
10.7
14.2
20.0
7.8
11.3
14.2
18.5
25.7
6.95
5.48
4.68
3.84
2.93
21.2
17.9
15.8
13.4
10.6
8.48
7.16
6.32
5.35
4.22
1.75 10.9
1.81 8.96
1.84 7.79
1.87 6.49
1.90 5.05
5
x
3
x 1/2
3/8
5/16
1/4
3/16
1/8
21.63
17.27
14.83
12.21
9.42
6.46
0.465
0.349
0.291
0.233
0.174
0.116
3.5
5.6
7.3
9.9
14.2
22.9
7.8
11.3
14.2
18.5
25.7
40.1
6.02
4.78
4.10
3.37
2.58
1.77
16.4
14.1
12.6
10.7
8.53
6.03
6.56
5.65
5.03
4.29
3.41
2.41
1.65
1.72
1.75
1.78
1.82
1.85
8.83
7.34
6.42
5.38
4.21
2.93
7.14
6.23
5.59
4.81
3.85
2.75
5
x 2 1/2 x 1/4
3/16
1/8
11.36
8.78
6.03
0.233
0.174
0.116
7.7
11.4
18.6
18.5
25.7
40.1
3.14
2.41
1.65
9.40
7.51
5.34
3.76
3.01
2.14
1.73
1.77
1.80
4.83
3.79
2.65
3.13 2.50
2.53 2.03
1.82 1.46
0.998
1.02
1.05
2.95
2.33
1.64
7.93
6.26
4.40
4.99
3.89
2.70
1.18
1.20
1.22
5
x
14.72
12.70
10.51
8.15
5.61
0.349
0.291
0.233
0.174
0.116
2.7
3.9
5.6
8.5
14.2
11.3
14.2
18.5
25.7
40.1
4.09
3.52
2.91
2.24
1.54
10.3
9.34
8.08
6.50
4.65
4.14
3.74
3.23
2.60
1.86
1.59
1.63
1.67
1.70
1.74
5.71
5.05
4.27
3.37
2.37
2.27
2.09
1.84
1.51
1.10
0.746
0.771
0.796
0.822
0.848
2.88
2.57
2.20
1.75
1.24
6.61
5.99
5.17
4.15
2.95
5.20
4.59
3.88
3.05
2.13
1.07
1.08
1.10
1.12
1.13
2
x 3/8
5/16
1/4
3/16
1/8
11
2.27
2.09
1.84
1.51
1.10
Y
DIMENSIONS AND SECTION
PROPERTIES OF RECTANGULAR HSS
X
X
Y
Nominal Size
in.
in.
3
in.
Weight
per
Foot
Wall
Thickness
t
Ib.
in.
b/t
h/t
Cross
Sectional
Area
Ix
Sx
rx
Zx
Iy
Sy
ry
Zy
Torsional
Stiffness
Constant
J
in.2
in.4
in.3
in.
in.3
in.4
in.3
in.
in.3
in.4
in.3
ft.2
X-X Axis
Y-Y Axis
Torsional
Shear
Surface
Constant
Area
C
Per Foot
4
x
x 3/8
5/16
1/4
3/16
1/8
14.72
12.70
10.51
8.15
5.61
0.349
0.291
0.233
0.174
0.116
5.6
7.3
9.9
14.2
22.9
8.5
10.7
14.2
20.0
31.5
4.09
3.52
2.91
2.24
1.54
7.92
7.13
6.15
4.93
3.52
3.96
3.57
3.07
2.47
1.76
1.39
1.42
1.45
1.49
1.51
5.12
4.51
3.81
3.00
2.11
5.00
4.52
3.91
3.16
2.27
3.33
3.01
2.61
2.10
1.51
1.11
1.13
1.16
1.19
1.21
4.18
3.69
3.12
2.46
1.73
10.6
9.41
7.96
6.26
4.38
6.59
5.75
4.81
3.74
2.59
1.07
1.08
1.10
1.12
1.13
4
x 2 1/2 x 5/16
1/4
3/16
11.64
9.66
7.51
0.291
0.233
0.174
5.6
7.7
11.4
10.7
14.2
20.0
3.23
2.67
2.06
6.13
5.32
4.30
3.06
2.66
2.15
1.38
1.41
1.44
3.97
3.38
2.67
2.89
2.53
2.06
2.31
2.02
1.65
0.946 2.85
0.973 2.43
0.999 1.93
6.77
5.78
4.59
4.67
3.93
3.08
1.00
1.02
1.03
4
x
12.17
10.58
8.81
6.87
4.75
0.349
0.291
0.233
0.174
0.116
2.7
3.9
5.6
8.5
14.2
8.5
10.7
14.2
20.0
31.5
3.39
2.94
2.44
1.89
1.30
5.59
5.12
4.49
3.66
2.65
2.80
2.56
2.25
1.83
1.32
1.28
1.32
1.36
1.39
1.43
3.84
3.43
2.94
2.34
1.66
1.79
1.66
1.48
1.22
0.898
1.79
1.66
1.48
1.22
0.898
0.727
0.752
0.778
0.804
0.830
4.83
4.40
3.82
3.08
2.20
4.04
3.59
3.05
2.41
1.69
0.90
0.92
0.93
0.95
0.97
2
x 3/8
5/16
1/4
3/16
1/8
12
2.31
2.08
1.79
1.43
1.02
Y
DIMENSIONS AND SECTION
PROPERTIES OF RECTANGULAR HSS
X
X
Y
Nominal Size
in.
in.
in.
3 1/2 x 2 1/2 x 3/8
5/16
1/4
3/16
1/8
Weight
per
Foot
Wall
Thickness
t
Ib.
in.
12.17
10.58
8.81
6.87
4.75
0.349
0.291
0.233
0.174
0.116
4.2
5.6
7.7
11.4
18.6
b/t
Cross
Sectional
Area
Ix
Sx
rx
Zx
Iy
Sy
ry
Zy
Torsional
Stiffness
Constant
J
in.2
in.4
in.3
in.
in.3
in.4
in.3
in.
in.3
in.4
in.3
ft.2
7.0
9.0
12.0
17.1
27.2
3.39
2.94
2.44
1.89
1.30
4.74
4.34
3.79
3.09
2.23
2.71
2.48
2.17
1.76
1.28
1.18
1.22
1.25
1.28
1.31
3.59
3.20
2.74
2.18
1.54
2.75
2.53
2.23
1.82
1.33
2.20
2.03
1.78
1.46
1.06
0.902
0.929
0.956
0.983
1.01
2.82
2.52
2.16
1.72
1.22
6.16
5.53
4.75
3.78
2.67
4.57
4.03
3.40
2.67
1.87
0.90
0.92
0.93
0.95
0.97
h/t
X-X Axis
Y-Y Axis
Torsional
Shear
Surface
Constant
Area
C
Per Foot
3
x 2 1/2 x 5/16
1/4
3/16
1/8
9.51
7.96
6.23
4.33
0.291
0.233
0.174
0.116
5.6
7.7
11.4
18.6
7.3
9.9
14.2
22.9
2.64
2.21
1.71
1.19
2.91
2.57
2.11
1.54
1.94
1.71
1.41
1.03
1.05
1.08
1.11
1.14
2.51
2.16
1.73
1.23
2.17
1.93
1.59
1.16
1.74
1.54
1.27
0.930
0.907
0.935
0.962
0.990
2.20
1.90
1.52
1.09
4.34
3.74
3.00
2.13
3.39
2.87
2.27
1.59
0.83
0.85
0.87
0.88
3
x
x 5/16
1/4
3/16
1/8
8.45
7.11
5.59
3.90
0.291
0.233
0.174
0.116
3.9
5.6
8.5
14.2
7.3
9.9
14.2
22.9
2.35
1.97
1.54
1.07
2.38
2.12
1.76
1.30
1.58
1.42
1.18
0.866
1.00
1.04
1.07
1.10
2.11
1.83
1.48
1.06
1.23
1.11
0.931
0.692
1.23
1.11
0.931
0.692
0.724
0.750
0.777
0.804
1.58
1.38
1.12
0.803
2.87
2.52
2.05
1.47
2.60
2.23
1.78
1.25
0.75
0.77
0.78
0.80
3
x 1 1/2 x 1/4
3/16
1/8
6.26
4.96
3.48
0.233
0.174
0.116
3.4
5.6
9.9
9.9
14.2
22.9
1.74
1.37
0.96
1.68
1.42
1.06
1.12
0.945
0.706
0.982 1.51
1.02 1.24
1.05 0.895
0.541 0.722 0.558 0.911
0.466 0.621 0.584 0.752
0.355 0.474 0.610 0.550
1.44
1.21
0.886
1.58
1.28
0.920
0.68
0.70
0.72
3
x
x 3/16
1/8
6.32
3.05
0.174
0.116
2.7
5.6
14.2
22.9
1.19
0.84
1.07 0.713
0.817 0.545
0.947 0.989
0.987 0.728
0.172 0.344 0.380 0.432
0.138 0.275 0.405 0.325
0.526
0.408
0.792
0.585
0.62
0.63
2 1/2 x 1 1/2 x 1/4
3/16
1/8
5.41
4.32
3.05
0.233
0.174
0.116
3.4
5.6
9.9
7.7
11.4
18.6
1.51
1.19
0.84
1.03 0.820
0.881 0.705
0.668 0.535
0.825 1.11
0.859 0.915
0.892 0.671
0.447 0.596 0.544 0.764
0.389 0.519 0.571 0.636
0.299 0.399 0.597 0.469
1.10
0.929
0.687
1.29
1.05
0.759
0.60
0.62
0.63
2
x 1 1/2 x 3/16
1/8
3.68
2.63
0.174
0.116
5.6
9.9
8.5
14.2
1.02
0.72
0.494 0.494
0.383 0.383
0.697 0.639
0.727 0.475
0.312 0.416 0.553 0.521
0.244 0.325 0.580 0.389
0.664
0.496
0.822
0.599
0.53
0.55
2
x
3.04
2.20
0.174
0.116
2.7
5.6
8.5
14.2
0.84
0.61
0.349 0.349
0.280 0.280
0.643 0.480
0.679 0.366
0.112 0.223 0.364 0.288
0.092 0.184 0.389 0.223
0.301
0.238
0.505
0.380
0.45
0.47
2
1
1
x 3/16
1/8
13
DIMENSIONS AND SECTION
PROPERTIES OF SQUARE HSS
Nominal Size
in.
Weight
per
Foot
Wall
Thickness
t
in.
in.
Ib.
in.
b/t
h/t
Torsional Torsional
Stiffness
Shear
Constant Constant
J
C
Cross
Sectional
Area
Surface
Area
Per Foot
I
S
r
Z
in.2
in.4
in.3
in.
in.3
in.4
in.3
ft.2
32
x
32 x
5/8*
1/2*
3/8*
259.83
210.72
159.37
0.625
0.500
0.375
48.2
61.0
82.3
48.2
61.0
82.3
76.4
61.9
46.8
12300
10100
7750
771
634
485
12.7
12.8
12.9
890
727
553
19700
15900
12000
1230
991
750
10.34
10.45
10.51
30
x
30 x
5/8*
1/2*
3/8*
242.82
197.11
149.16
0.625
0.500
0.375
45.0
57.0
77.0
45.0
57.0
77.0
71.4
57.9
43.8
10100
8320
6370
673
555
424
11.9
12.0
12.1
778
637
485
16200
13000
9870
1070
869
658
9.68
9.79
9.84
28
x
28 x
5/8*
1/2*
3/8*
225.80
183.50
138.95
0.625
0.500
0.375
41.8
53.0
71.7
41.8
53.0
71.7
66.4
53.9
40.8
8140
6730
5150
582
480
368
11.1
11.2
11.2
674
552
421
13100
10600
8010
933
755
572
9.01
9.12
9.17
26
x
26 x
5/8*
1/2*
3/8*
208.79
169.89
128.74
0.625
0.500
0.375
38.6
49.0
66.3
38.6
49.0
66.3
61.4
49.9
37.8
6460
5350
4110
497
411
316
10.3
10.4
10.4
577
474
362
10500
8430
6400
801
649
492
8.34
8.45
8.51
24
x
24 x
5/8*
1/2*
3/8*
191.78
156.28
118.53
0.625
0.500
0.375
35.4
45.0
61.0
35.4
45.0
61.0
56.4
45.9
34.8
5030
4170
3210
419
348
268
9.44
9.53
9.60
487
401
307
8180
6610
5020
679
551
418
7.68
7.79
7.84
22
x
22 x
5/8*
1/2*
3/8*
174.76
142.67
108.32
0.625
0.500
0.375
32.2
41.0
55.7
32.2
41.0
55.7
51.4
41.9
31.8
3820
3190
2460
347
290
223
8.62
8.72
8.78
406
335
256
6260
5070
3850
567
461
350
7.01
7.12
7.17
20
x
20 x
5/8*
1/2*
3/8*
157.75
129.06
98.12
0.625
0.500
0.375
29.0
37.0
50.3
29.0
37.0
50.3
46.4
37.9
28.8
2830
2370
1830
283
237
183
7.81
7.90
7.97
331
275
211
4670
3790
2880
465
379
288
6.34
6.45
6.51
18
x
18 x
5/8*
1/2*
3/8*
140.73
115.45
87.91
0.625
0.500
0.375
25.8
33.0
45.0
25.8
33.0
45.0
41.4
33.9
25.8
2020
1700
1320
224
189
147
6.99
7.08
7.15
264
220
169
3370
2740
2090
373
305
232
5.68
5.79
5.84
16
x
16 x
5/8
1/2
3/8
5/16
127.37
103.30
78.52
65.87
0.581
0.465
0.349
0.291
24.5
31.4
42.8
52.0
24.5
31.4
42.8
52.0
35.0
28.3
21.5
18.1
1370
1130
873
739
171
141
109
92.3
6.25
6.31
6.37
6.39
200
164
126
106
2170
1770
1350
1140
276
224
171
144
5.17
5.20
5.23
5.25
* This size produced by the submerged arc weld (SAW) process
14
DIMENSIONS AND SECTION
PROPERTIES OF SQUARE HSS
Nominal Size
in.
in.
in.
Weight
per
Foot
Wall
Thickness
t
Ib.
in.
b/t
h/t
Torsional Torsional
Stiffness
Shear
Constant Constant
J
C
Cross
Sectional
Area
I
S
r
Z
in.2
in.4
in.3
in.
in.3
in.4
14
x
14 x
5/8
1/2
3/8
5/16
110.36
89.68
68.31
57.36
0.581
0.465
0.349
0.291
21.1
27.1
37.1
45.1
21.1
27.1
37.1
45.1
30.3
24.6
18.7
15.7
896
743
577
490
128
106
82.5
69.9
5.44
5.49
5.55
5.58
151
124
95.4
80.5
1430
1170
900
759
12
x
12 x
5/8
1/2
3/8
5/16
1/4
93.34
76.07
58.10
48.86
39.43
0.581
0.465
0.349
0.291
0.233
17.7
22.8
31.4
38.2
48.5
17.7
22.8
31.4
38.2
48.5
25.7
20.9
16.0
13.4
10.8
548
457
357
304
248
91.3
76.2
59.5
50.7
41.4
4.62
4.68
4.73
4.76
4.79
109
89.6
69.2
58.6
47.6
10
x
10 x
5/8
1/2
3/8
5/16
1/4
3/16
76.33
62.46
47.90
40.35
32.63
24.73
0.581
0.465
0.349
0.291
0.233
0.174
14.2
18.5
25.7
31.4
39.9
54.5
14.2
18.5
25.7
31.4
39.9
54.5
21.0
17.2
13.2
11.1
8.96
6.76
304
256
202
172
141
108
60.8
51.2
40.4
34.5
28.3
21.6
3.80
3.86
3.92
3.94
3.97
4.00
9
x
9
x
1/2
3/8
5/16
1/4
3/16
55.66
42.79
36.10
29.23
22.18
0.465
0.349
0.291
0.233
0.174
16.4
22.8
27.9
35.6
48.7
16.4
22.8
27.9
35.6
48.7
15.3
11.8
9.92
8.03
6.06
182
145
124
102
78.2
40.6
32.2
27.6
22.7
17.4
8
x
8
x
5/8
1/2
3/8
5/16
1/4
3/16
59.32
48.85
37.69
31.84
25.82
19.63
0.581
0.465
0.349
0.291
0.233
0.174
10.8
14.2
19.9
24.5
31.3
43.0
10.8
14.2
19.9
24.5
31.3
43.0
16.4
13.5
10.4
8.76
7.10
5.37
146
125
99.6
85.6
70.7
54.4
7
x
7
x
5/8
1/2
3/8
5/16
1/4
3/16
50.81
42.05
32.58
27.59
22.42
17.08
0.581
0.465
0.349
0.291
0.233
0.174
9.0
12.1
17.1
21.1
27.0
37.2
9.0
12.1
17.1
21.1
27.0
37.2
14.0
11.6
8.97
7.59
6.17
4.67
93.3
80.5
64.9
56.1
46.5
36.0
15
in.3
Surface
Area
Per Foot
ft.2
208
170
130
109
4.50
4.53
4.57
4.58
885
728
561
474
384
151
123
94.6
79.7
64.5
3.83
3.87
3.90
3.92
3.93
73.2
60.7
47.2
40.1
32.7
24.8
498
412
320
271
220
167
102
84.2
64.8
54.8
44.4
33.6
3.17
3.20
3.23
3.25
3.27
3.28
3.45
3.51
3.54
3.56
3.59
48.4
37.8
32.1
26.2
20.0
296
231
196
159
121
67.4
52.1
44.0
35.8
27.1
2.87
2.90
2.92
2.93
2.95
36.5
31.2
24.9
21.4
17.7
13.6
2.99
3.04
3.10
3.13
3.15
3.18
44.7
37.5
29.4
25.1
20.5
15.7
244
204
160
136
111
84.5
63.2
52.4
40.7
34.5
28.1
21.3
2.50
2.53
2.57
2.58
2.60
2.62
26.7
23.0
18.6
16.0
13.3
10.3
2.58
2.63
2.69
2.72
2.75
2.77
33.1
27.9
22.1
18.9
15.5
11.9
158
133
105
89.7
73.5
56.1
47.1
39.3
30.7
26.1
21.3
16.2
2.17
2.20
2.23
2.25
2.27
2.28
DIMENSIONS AND SECTION
PROPERTIES OF SQUARE HSS
Weight
per
Foot
Wall
Thickness
t
in.
Ib.
in.
5/8
1/2
3/8
5/16
1/4
3/16
1/8
42.30
35.24
27.48
23.34
19.02
14.53
9.86
0.581
0.465
0.349
0.291
0.233
0.174
0.116
7.3
9.9
14.2
17.6
22.8
31.5
48.7
5 1/2 x 5 1/2 x
3/8
5/16
1/4
3/16
1/8
24.93
21.21
17.32
13.25
9.01
0.349
0.291
0.233
0.174
0.116
5
1/2
3/8
5/16
1/4
3/16
1/8
28.43
22.37
19.08
15.62
11.97
8.16
4 1/2 x 4 1/2 x
1/2
3/8
5/16
1/4
3/16
1/8
4
1/2
3/8
5/16
1/4
3/16
1/8
Nominal Size
in.
6
in.
x
x
x
6
5
4
x
x
x
Torsional Torsional
Stiffness
Shear
Constant Constant
J
C
Cross
Sectional
Area
I
S
r
Z
in.2
in.4
in.3
in.
in.3
in.4
in.3
ft.2
7.3
9.9
14.2
17.6
22.8
31.5
48.7
11.7
9.74
7.58
6.43
5.24
3.98
2.70
55.1
48.2
39.4
34.3
28.6
22.3
15.5
18.4
16.1
13.1
11.4
9.54
7.42
5.15
2.17
2.23
2.28
2.31
2.34
2.37
2.39
23.2
19.8
15.8
13.6
11.2
8.63
5.92
94.9
81.1
64.6
55.4
45.6
35.0
23.9
33.4
28.1
22.1
18.9
15.4
11.8
8.03
1.83
1.87
1.90
1.92
1.93
1.95
1.97
12.8
15.9
20.6
28.6
44.4
12.8
15.9
20.6
28.6
44.4
6.88
5.85
4.77
3.63
2.46
29.7
25.9
21.7
17.0
11.8
10.8
9.43
7.90
6.17
4.30
2.08
2.11
2.13
2.16
2.19
13.1
11.3
9.32
7.19
4.95
49.0
42.2
34.8
26.7
18.3
18.4
15.7
12.9
9.85
6.72
1.73
1.75
1.77
1.78
1.80
0.465
0.349
0.291
0.233
0.174
0.116
7.8
11.3
14.2
18.5
25.7
40.1
7.8
11.3
14.2
18.5
25.7
40.1
7.88
6.18
5.26
4.30
3.28
2.23
26.0
21.7
19.0
16.0
12.6
8.80
10.4
8.67
7.61
6.41
5.03
3.52
1.82
1.87
1.90
1.93
1.96
1.99
13.1
10.6
9.16
7.61
5.89
4.07
44.6
36.1
31.2
25.8
19.9
13.7
18.7
14.9
12.8
10.5
8.08
5.53
1.53
1.57
1.58
1.60
1.62
1.63
25.03
19.82
16.96
13.91
10.70
7.31
0.465
0.349
0.291
0.233
0.174
0.116
6.7
9.9
12.5
16.3
22.9
35.8
6.7
9.9
12.5
16.3
22.9
35.8
6.95
5.48
4.68
3.84
2.93
2.00
18.0
15.3
13.5
11.4
9.02
6.35
8.02
6.78
5.99
5.08
4.01
2.82
1.61
1.67
1.70
1.73
1.75
1.78
10.2
8.36
7.27
6.06
4.71
3.27
31.3
25.7
22.3
18.5
14.4
9.92
14.8
11.9
10.2
8.44
6.49
4.45
1.37
1.40
1.42
1.43
1.45
1.47
21.63
17.27
14.83
12.21
9.42
6.46
0.465
0.349
0.291
0.233
0.174
0.116
5.6
8.5
10.7
14.2
20.0
31.5
5.6
8.5
10.7
14.2
20.0
31.5
6.02
4.78
4.10
3.37
2.58
1.77
11.9
10.3
9.14
7.80
6.21
4.40
5.95
5.13
4.57
3.90
3.10
2.20
1.41
1.46
1.49
1.52
1.55
1.58
7.70
6.39
5.59
4.69
3.67
2.56
21.0
17.5
15.3
12.8
9.96
6.91
11.2
9.14
7.91
6.56
5.07
3.49
1.20
1.23
1.25
1.27
1.28
1.30
b/t
h/t
16
Surface
Area
Per Foot
DIMENSIONS AND SECTION
PROPERTIES OF SQUARE HSS
Weight
per
Foot
Wall
Thickness
t
Ib.
in.
3 1/2 x 3 1/2 x 3/8
5/16
1/4
3/16
1/8
14.72
12.70
10.51
8.15
5.61
0.349
0.291
0.233
0.174
0.116
7.0
9.0
12.0
17.1
27.2
3
Nominal Size
in.
in.
x
I
S
r
Z
in.2
in.4
in.3
in.
in.3
in.4
in.3
ft.2
7.0
9.0
12.0
17.1
27.2
4.09
3.52
2.91
2.24
1.54
6.48
5.84
5.04
4.05
2.90
3.70
3.34
2.88
2.31
1.66
1.26
1.29
1.32
1.35
1.37
4.69
4.14
3.50
2.76
1.93
11.2
9.89
8.35
6.56
4.58
6.77
5.90
4.92
3.83
2.65
1.07
1.08
1.10
1.12
1.13
h/t
Surface
Area
Per Foot
x
3/8
5/16
1/4
3/16
1/8
12.17
10.58
8.81
6.87
4.75
0.349
0.291
0.233
0.174
0.116
5.6
7.3
9.9
14.2
22.9
5.6
7.3
9.9
14.2
22.9
3.39
2.94
2.44
1.89
1.30
3.77
3.45
3.02
2.46
1.78
2.51
2.30
2.01
1.64
1.19
1.05
1.08
1.11
1.14
1.17
3.25
2.90
2.48
1.97
1.40
6.64
5.94
5.08
4.03
2.84
4.74
4.18
3.52
2.76
1.92
0.90
0.92
0.93
0.95
0.97
2 1/2 x 2 1/2 x
5/16
1/4
3/16
1/8
8.45
7.11
5.59
3.90
0.291
0.233
0.174
0.116
5.6
7.7
11.4
18.6
5.6
7.7
11.4
18.6
2.35
1.97
1.54
1.07
1.82
1.63
1.35
0.998
1.45
1.30
1.08
0.798
0.879
0.908
0.937
0.965
1.88
1.63
1.32
0.947
3.20
2.79
2.25
1.61
2.74
2.35
1.86
1.31
0.75
0.77
0.78
0.80
2 1/4 x 2 1/4 x
1/4
3/16
1/8
6.26
4.96
3.48
0.233
0.174
0.116
6.7
9.9
16.4
6.7
9.9
16.4
1.74
1.37
0.96
1.13
0.952
0.712
1.00
0.847
0.633
0.805
0.835
0.863
1.28
1.04
0.755
1.96
1.60
1.15
1.85
1.48
1.05
0.68
0.70
0.72
2
1/4
3/16
1/8
5.41
4.32
3.05
0.233
0.174
0.116
5.6
8.5
14.2
5.6
8.5
14.2
1.51
1.19
0.84
0.745
0.640
0.486
0.745
0.640
0.486
0.703
0.732
0.761
0.964
0.797
0.584
1.31
1.09
0.796
1.41
1.14
0.817
0.60
0.62
0.63
1 3/4 x 1 3/4 x 3/16
3.68
0.174
7.1
7.1
1.02
0.405
0.462
0.630
0.585
0.699
0.844
0.53
1 5/8 x 1 5/8 x 3/16
1/8
3.36
2.42
0.174
0.116
6.3
11.0
6.3
11.0
0.93
0.67
0.312
0.246
0.384
0.302
0.579
0.608
0.491
0.370
0.544
0.410
0.712
0.522
0.49
0.51
1 1/2 x 1 1/2 x 3/16
1/8
3.04
2.20
0.174
0.116
5.6
9.9
5.6
9.9
0.84
0.61
0.235
0.188
0.314
0.251
0.528
0.556
0.406
0.309
0.414
0.316
0.592
0.438
0.45
0.47
1 1/4 x 1 1/4 x 3/16
1/8
2.40
1.78
0.174
0.116
4.2
7.8
4.2
7.8
0.67
0.49
0.121
0.101
0.194
0.162
0.425
0.454
0.259
0.204
0.218
0.174
0.383
0.292
0.37
0.38
x
3
in.
b/t
Torsional Torsional
Stiffness
Shear
Constant Constant
J
C
Cross
Sectional
Area
2
x
17
DIMENSIONS AND SECTION
PROPERTIES OF ROUND HSS
Nominal Size
Weight
per
Foot
Wall
Thickness
t
Outside
Diameter
Wall
in.
in.
Ib.
in.
D/t
Cross
Sectional
Area
I
S
r
in.2
in.4
in.3
in.
20.000
x
0.500
0.375
104.23
78.67
0.465
0.349
43.0
57.3
28.5
21.5
1360
1040
18.000
x
0.500
0.375
93.54
70.65
0.465
0.349
38.7
51.6
25.6
19.4
16.000
x
0.500
0.438
0.375
0.312
82.85
72.86
62.64
52.32
0.465
0.407
0.349
0.291
34.4
39.3
45.8
55.0
14.000
x
0.500
0.375
0.312
72.16
54.62
45.65
0.465
0.349
0.291
12.750
x
0.500
0.375
0.250
65.48
49.61
33.41
12.500
x
0.625
0.500
0.375
0.312
0.250
0.188
12.313
x
12.250
x
Z
Torsional
Stiffness
Constant
J
Torsional
Shear
Constant
C
Surface
Area
Per Foot
in.3
in.4
in.3
ft.2
136
104
6.91
6.95
177
135
2720
2080
272
208
5.24
5.24
985
754
109
83.8
6.20
6.24
143
109
1970
1510
219
168
4.71
4.71
22.7
19.9
17.2
14.4
685
606
526
443
85.7
75.8
65.7
55.4
5.49
5.51
5.53
5.55
112
99.0
85.5
71.8
1370
1210
1050
886
171
152
131
111
4.19
4.19
4.19
4.19
30.1
40.1
48.1
19.8
15.0
12.5
453
349
295
64.8
49.8
42.1
4.79
4.83
4.85
85.2
65.1
54.7
907
698
589
130
99.7
84.2
3.67
3.67
3.67
0.465
0.349
0.233
27.4
36.5
54.7
17.9
13.6
9.16
339
262
180
53.2
41.0
28.2
4.35
4.39
4.43
70.2
53.7
36.5
678
523
359
106
82.1
56.3
3.34
3.34
3.34
79.34
64.14
48.61
40.65
32.74
24.74
0.581
0.465
0.349
0.291
0.233
0.174
21.5
26.9
35.8
43.0
53.6
71.8
21.8
17.6
13.3
11.2
8.98
6.74
387
319
246
208
169
128
62.0
51.0
39.4
33.3
27.0
20.5
4.22
4.26
4.30
4.32
4.34
4.36
82.6
67.4
51.5
43.4
35.1
26.4
774
638
492
416
338
256
124
102
78.7
66.6
54.1
41.0
3.27
3.27
3.27
3.27
3.27
3.27
0.625
0.500
0.375
0.312
0.250
0.188
78.09
63.14
47.86
40.03
32.24
24.37
0.581
0.465
0.349
0.291
0.233
0.174
21.2
26.5
35.3
42.3
52.8
70.8
21.4
17.3
13.1
11.0
8.84
6.64
369
304
235
199
161
122
60.0
49.4
38.2
32.3
26.2
19.9
4.15
4.19
4.23
4.25
4.27
4.29
80.0
65.3
50.0
42.1
34.0
25.6
739
608
470
397
323
244
120
98.8
76.3
64.5
52.4
39.7
3.22
3.22
3.22
3.22
3.22
3.22
0.625
0.500
0.375
0.312
0.250
0.188
77.67
62.80
47.60
39.82
32.07
24.24
0.581
0.465
0.349
0.291
0.233
0.174
21.1
26.3
35.1
42.1
52.6
70.4
21.3
17.2
13.0
10.9
8.80
6.60
363
299
231
196
159
120
59.3
48.9
37.7
31.9
25.9
19.6
4.13
4.17
4.21
4.23
4.25
4.27
79.2
64.6
49.4
41.6
33.7
25.4
727
599
462
391
318
241
119
97.7
75.5
63.9
51.9
39.3
3.21
3.21
3.21
3.21
3.21
3.21
18
DIMENSIONS AND SECTION
PROPERTIES OF ROUND HSS
Nominal Size
Weight
per
Foot
Wall
Thickness
t
Outside
Diameter
Wall
in.
in.
Ib.
in.
D/t
Z
Torsional
Stiffness
Constant
J
Torsional
Shear
Constant
C
Surface
Area
Per Foot
in.
in.3
in.4
in.3
ft.2
Cross
Sectional
Area
I
S
r
in.2
in.4
in.3
11.250
x
0.625
0.500
0.375
0.312
0.250
0.188
70.99
57.46
43.60
36.48
29.40
22.23
0.581
0.465
0.349
0.291
0.233
0.174
19.4
24.2
32.2
38.7
48.3
64.7
19.5
15.8
12.0
10.0
8.06
6.05
278
229
178
151
122
92.9
49.4
40.8
31.6
26.8
21.8
16.5
3.78
3.82
3.86
3.88
3.90
3.92
66.2
54.1
41.5
35.0
28.3
21.3
556
459
355
301
245
186
98.8
81.6
63.2
53.5
43.5
33.0
2.95
2.95
2.95
2.95
2.95
2.95
10.750
x
0.500
0.365
0.250
54.79
40.52
28.06
0.465
0.340
0.233
23.1
31.6
46.1
15.0
11.1
7.70
199
151
106
37.0
28.1
19.8
3.64
3.68
3.72
49.2
36.9
25.8
398
302
213
74.1
56.1
39.6
2.81
2.81
2.81
10.000
x
0.625
0.500
0.375
0.312
0.250
0.188
62.64
50.78
38.58
32.31
26.06
19.72
0.581
0.465
0.349
0.291
0.233
0.174
17.2
21.5
28.7
34.4
42.9
57.5
17.2
13.9
10.6
8.88
7.15
5.37
191
159
123
105
85.3
64.8
38.3
31.7
24.7
20.9
17.1
13.0
3.34
3.38
3.41
3.43
3.45
3.47
51.6
42.3
32.5
27.4
22.2
16.8
383
317
247
209
171
130
76.6
63.5
49.3
41.9
34.1
25.9
2.62
2.62
2.62
2.62
2.62
2.62
9.625
x
0.500
0.375
0.312
0.250
0.188
48.77
37.08
31.06
25.05
18.97
0.465
0.349
0.291
0.233
0.174
20.7
27.6
33.1
41.3
55.3
13.4
10.2
8.53
6.87
5.17
141
110
93.0
75.9
57.7
29.2
22.8
19.3
15.8
12.0
3.24
3.28
3.30
3.32
3.34
39.0
30.0
25.4
20.6
15.5
281
219
186
152
115
58.5
45.5
38.7
31.5
24.0
2.52
2.52
2.52
2.52
2.52
8.750
x
0.500
0.375
0.312
0.250
0.188
44.10
33.57
28.14
22.72
17.21
0.465
0.349
0.291
0.233
0.174
18.8
25.1
30.1
37.6
50.3
12.1
9.21
7.73
6.23
4.69
104
81.4
69.3
56.6
43.1
23.8
18.6
15.8
12.9
9.86
2.93
2.97
2.99
3.01
3.03
32.0
24.6
20.8
16.9
12.8
208
163
139
113
86.2
47.6
37.2
31.7
25.9
19.7
2.29
2.29
2.29
2.29
2.29
8.625
x
0.500
0.375
0.322
0.250
0.188
43.43
33.07
28.58
22.38
16.96
0.465
0.349
0.300
0.233
0.174
18.5
24.7
28.7
37.0
49.6
11.9
9.07
7.85
6.14
4.62
99.5
77.8
68.1
54.1
41.3
23.1
18.0
15.8
12.5
9.57
2.89
2.93
2.95
2.97
2.99
31.0
23.9
20.8
16.4
12.4
199
156
136
108
82.5
46.2
36.1
31.6
25.1
19.1
2.26
2.26
2.26
2.26
2.26
19
DIMENSIONS AND SECTION
PROPERTIES OF ROUND HSS
Nominal Size
Weight
per
Foot
Wall
Thickness
t
Outside
Diameter
Wall
in.
in.
Ib.
in.
D/t
Z
Torsional
Stiffness
Constant
J
Torsional
Shear
Constant
C
Surface
Area
Per Foot
in.
in.3
in.4
in.3
ft.2
Cross
Sectional
Area
I
S
r
in.2
in.4
in.3
7.625
x
0.375
0.328
0.125
29.06
25.59
10.02
0.349
0.305
0.116
21.8
25.0
65.7
7.98
7.01
2.74
52.9
47.1
19.3
13.9
12.3
5.06
2.58
2.59
2.66
18.5
16.4
6.54
106
94.1
38.6
27.8
24.7
10.1
2.00
2.00
2.00
7.500
x
0.500
0.375
0.312
0.250
0.188
37.42
28.56
23.97
19.38
14.70
0.465
0.349
0.291
0.233
0.174
16.1
21.5
25.8
32.2
43.1
10.3
7.84
6.59
5.32
4.00
63.9
50.2
42.9
35.2
26.9
17.0
13.4
11.4
9.37
7.17
2.49
2.53
2.55
2.57
2.59
23.0
17.9
15.1
12.3
9.34
128
100
85.8
70.3
53.8
34.1
26.8
22.9
18.7
14.3
1.96
1.96
1.96
1.96
1.96
7.000
x
0.500
0.375
0.312
0.250
0.188
0.125
34.74
26.56
22.31
18.04
13.69
9.19
0.465
0.349
0.291
0.233
0.174
0.116
15.1
20.1
24.1
30.0
40.2
60.3
9.55
7.29
6.13
4.95
3.73
2.51
51.2
40.4
34.6
28.4
21.7
14.9
14.6
11.6
9.88
8.11
6.21
4.25
2.32
2.35
2.37
2.39
2.41
2.43
19.9
15.5
13.1
10.7
8.11
5.50
102
80.9
69.1
56.8
43.5
29.7
29.3
23.1
19.8
16.2
12.4
8.49
1.83
1.83
1.83
1.83
1.83
1.83
20
DIMENSIONS AND SECTION
PROPERTIES OF ROUND HSS
Nominal Size
Weight
per
Foot
Wall
Thickness
t
Outside
Diameter
Wall
in.
in.
Ib.
in.
D/t
Z
Torsional
Stiffness
Constant
J
Torsional
Shear
Constant
C
Surface
Area
Per Foot
in.
in.3
in.4
in.3
ft.2
Cross
Sectional
Area
I
S
r
in.2
in.4
in.3
6.875
x
0.500
0.375
0.312
0.250
0.188
34.07
26.06
21.89
17.71
13.44
0.465
0.349
0.291
0.233
0.174
14.8
19.7
23.6
29.5
39.5
9.36
7.16
6.02
4.86
3.66
48.3
38.2
32.7
26.8
20.6
14.1
11.1
9.51
7.81
5.99
2.27
2.31
2.33
2.35
2.37
19.1
14.9
12.6
10.3
7.81
96.7
76.4
65.4
53.7
41.1
28.1
22.2
19.0
15.6
12.0
1.80
1.80
1.80
1.80
1.80
6.625
x
0.500
0.432
0.375
0.312
0.280
0.250
0.188
0.125
32.74
28.60
25.05
21.06
18.99
17.04
12.94
8.69
0.465
0.403
0.349
0.291
0.261
0.233
0.174
0.116
14.2
16.4
19.0
22.8
25.4
28.4
38.1
57.1
9.00
7.88
6.88
5.79
5.22
4.68
3.53
2.37
42.9
38.3
34.0
29.1
26.5
23.9
18.4
12.6
13.0
11.6
10.3
8.79
7.99
7.22
5.54
3.79
2.18
2.20
2.22
2.24
2.25
2.26
2.28
2.30
17.7
15.6
13.8
11.7
10.6
9.52
7.24
4.92
85.9
76.6
68.0
58.2
52.9
47.9
36.7
25.1
25.9
23.1
20.5
17.6
16.0
14.4
11.1
7.59
1.73
1.73
1.73
1.73
1.73
1.73
1.73
1.73
6.125
x
0.500
0.375
0.312
0.250
0.188
30.07
23.05
19.39
15.70
11.93
0.465
0.349
0.291
0.233
0.174
13.2
17.6
21.0
26.3
35.2
8.27
6.33
5.33
4.31
3.25
33.3
26.5
22.7
18.7
14.4
10.9
8.66
7.43
6.12
4.71
2.01
2.05
2.07
2.08
2.10
14.9
11.7
9.91
8.09
6.16
66.7
53.0
45.5
37.5
28.8
21.8
17.3
14.9
12.2
9.41
1.60
1.60
1.60
1.60
1.60
6.000
x
0.500
0.375
0.312
0.280
0.250
0.188
0.125
29.40
22.55
18.97
17.12
15.37
11.68
7.85
0.465
0.349
0.291
0.261
0.233
0.174
0.116
12.9
17.2
20.6
23.0
25.8
34.5
51.7
8.09
6.20
5.22
4.71
4.22
3.18
2.14
31.2
24.8
21.3
19.4
17.6
13.5
9.28
10.4
8.28
7.11
6.47
5.86
4.51
3.09
1.96
2.00
2.02
2.03
2.04
2.06
2.08
14.3
11.2
9.49
8.60
7.75
5.91
4.02
62.4
49.7
42.6
38.8
35.2
27.0
18.6
20.8
16.6
14.2
12.9
11.7
9.02
6.19
1.57
1.57
1.57
1.57
1.57
1.57
1.57
21
DIMENSIONS AND SECTION
PROPERTIES OF ROUND HSS
Nominal Size
Weight
per
Foot
Wall
Thickness
t
Outside
Diameter
Wall
in.
in.
Ib.
in.
D/t
Z
Torsional
Stiffness
Constant
J
Torsional
Shear
Constant
C
Surface
Area
Per Foot
in.
in.3
in.4
in.3
ft.2
Cross
Sectional
Area
I
S
r
in.2
in.4
in.3
5.563
x
0.375
0.258
0.188
0.134
20.80
14.63
10.80
7.78
0.349
0.241
0.174
0.125
15.9
23.1
32.0
44.5
5.72
4.03
2.95
2.14
19.5
14.3
10.7
7.90
7.02
5.14
3.85
2.84
1.85
1.88
1.91
1.92
9.50
6.83
5.05
3.70
39.0
28.6
21.4
15.8
14.0
10.3
7.70
5.68
1.46
1.46
1.46
1.46
5.500
x
0.500
0.375
0.258
26.73
20.54
14.46
0.465
0.349
0.241
11.8
15.8
22.8
7.36
5.65
3.98
23.5
18.8
13.8
8.55
6.84
5.02
1.79
1.83
1.86
11.8
9.27
6.67
47.0
37.6
27.6
17.1
13.7
10.0
1.44
1.44
1.44
5.000
x
0.500
0.375
0.312
0.258
0.250
0.188
0.125
24.05
18.54
15.64
13.08
12.69
9.67
6.51
0.465
0.349
0.291
0.241
0.233
0.174
0.116
10.8
14.3
17.2
20.7
21.5
28.7
43.1
6.62
5.10
4.30
3.60
3.49
2.64
1.78
17.2
13.9
12.0
10.2
9.94
7.69
5.31
6.88
5.55
4.79
4.09
3.97
3.08
2.12
1.61
1.65
1.67
1.68
1.69
1.71
1.73
9.60
7.56
6.46
5.46
5.30
4.05
2.77
34.4
27.7
24.0
20.5
19.9
15.4
10.6
13.8
11.1
9.58
8.18
7.95
6.15
4.25
1.31
1.31
1.31
1.31
1.31
1.31
1.31
4.500
x
0.337
0.237
0.188
0.125
15.00
10.80
8.67
5.85
0.315
0.221
0.174
0.116
14.3
20.4
25.9
38.8
4.14
2.97
2.36
1.60
9.12
6.82
5.54
3.84
4.05
3.03
2.46
1.71
1.48
1.51
1.53
1.55
5.53
4.05
3.26
2.23
18.2
13.6
11.1
7.68
8.11
6.06
4.93
3.41
1.18
1.18
1.18
1.18
4.000
x
0.337
0.313
0.250
0.237
0.226
0.220
0.188
0.125
13.20
12.34
10.02
9.53
9.12
8.89
7.66
5.18
0.315
0.291
0.233
0.221
0.211
0.205
0.174
0.116
12.7
13.7
17.2
18.1
19.0
19.5
23.0
34.5
3.65
3.39
2.76
2.62
2.51
2.44
2.09
1.42
6.24
5.87
4.91
4.70
4.52
4.41
3.83
2.67
3.12
2.93
2.45
2.35
2.26
2.21
1.92
1.34
1.31
1.32
1.33
1.34
1.34
1.34
1.35
1.37
4.29
4.01
3.31
3.16
3.03
2.96
2.55
1.75
12.5
11.7
9.82
9.40
9.04
8.83
7.67
5.34
6.24
5.87
4.91
4.70
4.52
4.41
3.83
2.67
1.05
1.05
1.05
1.05
1.05
1.05
1.05
1.05
22
DIMENSIONS AND SECTION
PROPERTIES OF ROUND HSS
Nominal Size
Weight
per
Foot
Wall
Thickness
t
Outside
Diameter
Wall
in.
in.
Ib.
in.
D/t
Z
Torsional
Stiffness
Constant
J
Torsional
Shear
Constant
C
Surface
Area
Per Foot
in.
in.3
in.4
in.3
ft.2
Cross
Sectional
Area
I
S
r
in.2
in.4
in.3
3.500
x
0.313
0.300
0.250
0.216
0.203
0.188
0.125
10.66
10.26
8.69
7.58
7.15
6.66
4.51
0.291
0.280
0.233
0.201
0.189
0.174
0.116
12.0
12.5
15.0
17.4
18.5
20.1
30.2
2.93
2.83
2.39
2.08
1.97
1.82
1.23
3.81
3.70
3.21
2.84
2.70
2.52
1.77
2.18
2.11
1.83
1.63
1.54
1.44
1.01
1.14
1.14
1.16
1.17
1.17
1.18
1.20
3.00
2.91
2.49
2.19
2.07
1.93
1.33
7.61
7.40
6.41
5.69
5.41
5.04
3.53
4.35
4.23
3.66
3.25
3.09
2.88
2.02
0.92
0.92
0.92
0.92
0.92
0.92
0.92
3.000
x
0.300
0.250
0.216
0.203
0.188
0.152
0.134
0.120
8.66
7.35
6.43
6.07
5.65
4.63
4.11
3.69
0.280
0.233
0.201
0.189
0.174
0.142
0.125
0.112
10.7
12.9
14.9
15.9
17.2
21.1
24.0
26.8
2.39
2.03
1.77
1.67
1.54
1.27
1.13
1.02
2.24
1.95
1.74
1.66
1.55
1.30
1.17
1.06
1.49
1.30
1.16
1.10
1.03
0.870
0.779
0.707
0.967
0.982
0.992
0.996
1.00
1.01
1.02
1.02
2.08
1.79
1.58
1.50
1.39
1.16
1.03
0.935
4.47
3.90
3.48
3.31
3.10
2.61
2.34
2.12
2.98
2.60
2.32
2.21
2.06
1.74
1.56
1.41
0.79
0.79
0.79
0.79
0.79
0.79
0.79
0.79
2.875
x
0.250
0.203
0.188
0.125
7.02
5.80
5.40
3.67
0.233
0.189
0.174
0.116
12.3
15.2
16.5
24.8
1.93
1.59
1.48
1.01
1.70
1.45
1.35
0.958
1.18
1.01
0.941
0.667
0.938
0.952
0.957
0.976
1.63
1.37
1.27
0.884
3.40
2.89
2.70
1.92
2.37
2.01
1.88
1.33
0.75
0.75
0.75
0.75
2.500
x
0.250
0.188
0.125
6.01
4.65
3.17
0.233
0.174
0.116
10.7
14.4
21.6
1.66
1.27
0.87
1.08
0.865
0.619
0.862
0.692
0.495
0.806
0.825
0.844
1.20
0.943
0.660
2.15
1.73
1.24
1.72
1.38
0.990
0.65
0.65
0.65
2.375
x
0.250
0.218
0.188
0.154
0.125
5.68
5.03
4.40
3.66
3.01
0.233
0.204
0.174
0.143
0.116
10.2
11.6
13.6
16.6
20.5
1.57
1.39
1.20
1.00
0.82
0.910
0.827
0.733
0.627
0.527
0.766
0.696
0.617
0.528
0.443
0.762
0.771
0.781
0.791
0.800
1.07
0.964
0.845
0.713
0.592
1.82
1.65
1.47
1.25
1.05
1.53
1.39
1.23
1.06
0.887
0.62
0.62
0.62
0.62
0.62
1.900
x
0.145
2.72
0.135
14.1
0.75
0.293
0.309
0.626
0.421
0.586
0.617
0.50
1.660
x
0.140
2.27
0.130
12.8
0.62
0.184
0.222
0.543
0.305
0.368
0.444
0.43
23
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