To Roadway
SELECTION PROCEDURE
Pole Cap (see
Top of Cap
STEEL STRAIN POLE NOTES
1. Determine the required pole height and bending moment at the pole
Pole Top Details)
base using a design wind speed in conformance with the "Plans
(Min.)
Catenary Wire Clamp
(see Details)
Preparation Manual", Chapter 29.
ASTM A572 Grade 50, 55, 60, or 65 ( 1/4 " and over) or
Pole Type and wall thickness.
ASTM A595 Grade A (55 ksi yield) or Grade B (60 ksi yield)
3. Enter the Pole Type and height designation in the signalization Plans
for each strain pole.
Example: From design: required height = 23’-6",
4. Refer to the Table of Variables for the required pole diameter,
1’-0"
r
’D’
0.14"
NS-IV NS-V
NS-VI
NS-VII
NS-VIII
NS-IX
NS-X
20
33.0
106.0
152.0
210.0
266.0
330.0
390.0
22
36.8
111.2
158.7
218.0
274.9
340.3
401.7
24
40.6
116.4
165.3
226.0
283.9
350.7
413.3
26
44.4
121.6
172.0
ASTM A36
Weld Metal
->
E70XX
234.0
292.8
361.0
425.0
28
48.2
126.8
178.7
242.0
301.7
371.3
436.7
30
52.0
132.0
185.3
250.0
310.7
381.7
448.3
32
55.8
137.2
192.0
258.0
319.6
392.0
460.0
34
59.6
142.4
198.7
266.0
328.5
402.3
471.7
36
63.4
147.6
205.3
274.0
337.5
412.7
483.3
38
67.2
152.8
212.0
282.0
346.4
423.0
495.0
40
71.0
158.0
218.7
290.0
355.3
433.3
506.7
42
74.8
163.2
225.3
298.0
364.3
443.7
518.3
44
78.6
168.4
232.0
306.0
373.2
454.0
530.0
46
82.4
173.6
238.7
314.0
382.1
464.3
541.7
48
86.2
178.8
245.3
322.0
391.1
474.7
553.3
50
90.0
184.0
252.0
330.0
400.0
ASTM A325, Type 1
Anchor Bolts
->
ASTM F1554 Grade 55
Nuts for Anchor Bolts
->
ASTM A563 Grade A Heavy Hex
ASTM F436 Type 1
Handhole Frame
->
ASTM A709 Grade 36 or ASTM A36
Handhole Cover
->
ASTM A1011 Grade 50, 55, 60, or 65
Aluminum Caps and Covers ->
Stainless Steel Screws
->
ASTM B26 (319-F)
AISI Type 316
2. All Steel items shall be Galvanized as follows:
All Nuts, Bolts and Washers->
All other Steel Items
->
ASTM A153 Class C or D depending on size
ASTM A123
3. Concrete shall be Class ?! (Drilled Shaft) with a minimum 28-day Compressive Strength
(f’c) of 4,000 psi for all environmental classifications.
4. Reinforcing Steel shall be ASTM A615 Grade 60.
5. Grout shall have a mininum 28-day Compressive Strength of 5,000 psi and shall meet the
requirements of Section 934. Grout after pole is set and properly plumbed.
6. A design wind speed of 100 mph with a 30% gust factor for wind loading on the pole was
included in the design.
Wall Thickness
D (ft.)
0.313 inch
Wire Entrance
(see Detail)
Wall Thickness
TYPE OF POLE
2" Pipe For
0.239 inch
MINIMUM REQUIRED MOMENT CAPACITY (kip-ft)
(see Details)
->
Washers for Anchor Bolts ->
base plate and drillled shaft dimensions.
Messenger Wire Clamp
Steel Plates
Bolts (except Anchor Bolts) ->
base moment = 198.0 kip-ft
From table: use NS-VII-24
9"
Tape
--> ASTM A1011 Grade 50, 55, 60, or 65 (less than 1/4 ") or
Poles
2. Enter the Pole Moment Capacity Table, and determine the required
Plans)
As required
1’-0"
(see Signalization
Hook
(see Detail)
1. Signal Structure Materials shall be as follows:
7. The Pole shall be tapered with the diameter changing at a rate of 0.14 inch per foot.
8. Except for anchor bolts, all bolt hole diameters shall be equal to the bolt
diameter plus 1/16 ", prior to galvanizing. Hole diameters for anchor bolts shall
not exceed the bolt diameter plus 1/2 ".
9.
The pole shall be free of transverse welds except at the base.
10.
Poles constructed out of two or more sections with overlapping splices are not permitted.
11.
No field welding on any part of the pole is permitted.
12. For clamp spacing, cable sizes and forces, signal and sign mounting locations and details
see the Signalization Plans.
13. All welding shall conform to American Welding Society Structural Welding Code (Steel) ANSI/AWS
D1.1 (current edition).
14. See Standard Index No. 17727 for grounding detail and span wire installation details.
485.0
565.0
15. Locate handhole 180^ from 2 inch wire entrance pipe.
16. Manufacturers seeking approval of a steel strain pole assembly for inclusion on the Qualified
Products List must submit a QPL Product Evaluation Application along with design documentation
and drawings showing the product meets all specified requirements of this Index.
Handhole
17. If a grout pad is not installed, baseplates shall be secured with double nuts both above and
(See Details)
below the baseplate. The locking nuts shall be half-height nuts. The standoff distance (the
distance between the bottom of the full-height leveling nut and the top of the foundation)
Top of Sidewalk
Bottom of
Base Plate
shall not exceed one anchor bolt diameter. In rural areas, the top of the foundation should be
or Finished
greater than 12" above finished grade. A vertically placed wire cloth screen between the
Grade
baseplate and the top of the foundation shall be wrapped horizontally around the baseplate
with a 3" min. lap. The wire cloth shall be galvanized steel standard grade plain weave 2x2
Grout
mesh 0.063" dia. wire. The screen shall be attached to the baseplate with stainless steel
2’-6"
self-tapping 1/4 " screws with stainless steel washers spaced at 9" centers.
Aluminum Identification Tag Not to Exceed 2" x 4". Secure to Shaft by 0.125"
Stainless Steel rivets or screws. Fabricators to provide details for approval.
Identification Tag Located on inside of Pole visible from handhole. Tag to
be stamped with the following information :
Wire Entry Conduit
Financial Project ID
Pole Type
Pole Height
Manufacturer’s Name
Certification No.
Drilled Shaft
(See Details)
ELEVATION AND NOTES
ELEVATION
2006 FDOT Design Standards
STEEL STRAIN POLE
Last
Revision
Sheet No.
07/01/05
1 of 3
Index No.
17723
3/4 " Dia. Weep Hole One per Pole
placed between Bolts or 3/8 " \
all-cotton sash cord wick attached
to interior of pole, extended beyond
| Drilled
’BA’
Shaft
Base Plate Dia.
grout pad, and installed prior to grouting.
’BC’ Dia. Anchor
2x’BC’ 2x’BC’
Bolt Threaded
’BA’-4x’BC’
1" x 1"
8" min. each end
Chamfer
’BD’
| ’BC’ \
6"
| Pole
Double Nuts, top Nut may
Minimum break radius
Anchor Bolt
= 0.25 x (inside radius)
be half-height ’Jam’ Nut
Center of Drilled Shaft,
(Cast Aluminum Nut
Base Plate and Pole
’K’ Base \
Cover not shown)
1/4 " Plate
A
A
Washer
Center
1/2 "
’BC’ \ Anchor Bolts
’BB’
equally spaced
Edge of
Inside radius
measured
of Pole
center to flat
Grout
1.5x’BC’
Base Plate
’J’ Wall
45^
Pad
Thickness
VIEW B-B
Double
Nuts (Typ.)
Leveling
NOTE: Number of bolts shown for illustration purposes only.
Nut
’BE’
(See Tabel for actual quantity)
0.6 x ’J’
Seam weld (Typ.)
#5 Tie Bars @ 1’-6"
’DB’
’DB’
NOTE: Longitudinal seam welds
Shaft Diameter
DETAIL C
’BA’
within 6" of circumferential
welds shall be complete
penetration welds.
Center of Handhole,
see Handhole Details
TABLE OF STRAIN POLE VARIABLES
POLE
POLE
B
B
TYPE
#9 Bars
Equally Spaced
BASE CONNECTION
SHAFT
J
K
No. of
BA
BB
BC
BD
BE
BF
DA
DB
No. of
(in.)
(in.)
Bolts
(in.)
(in.)
(in.)
(in.)
(in.)
(in.)
(ft)
(ft)
#9 bars
Top of grade
or sidewalk
1" x 1"
NS-IV
14
6
25
2.125
1.375
0.313
0.188
36
10
3.5
14
NS-V
16
8
27
2.250
1.375
0.375
0.188
47
12.5
3.5
14
0.438
0.188
54
14
3.5
14
15
4
19
19
Grout
See Detail C
J = 0.239
Chamfer
18
8
30
2.375
1.500
21
10
33
2.250
1.500
0.375
0.188
49
NS-VIII
23
12
34
2.250
1.375
0.375
0.188
52
16
4
NS-IX
25
12
37
2.250
1.500
0.375
0.188
50
16
4.5
23
NS-X
27
12
39
2.375
1.500
0.375
0.188
52
17
4.5
23
NS-V
16
8
28
2.375
1.500
0.438
0.250
47
12.5
3.5
14
18
10
30
2.375
1.500
0.500
0.250
54
14
3.5
14
2.375
1.500
0.500
0.250
49
15
4
19
16
4
NS-VI
NS-VII
PARTIAL ELEVATION
(Showing Base Plate, Anchor bolts and Handhole)
6"
’DB’
Shaft Diameter
DRILLED SHAFT ELEVATION
NS-VI
(See Table for number of #9 bars.)
"
2
’-
2
ap
FOUNDATION NOTES:
21
12
33
23
12
35
2.500
1.500
0.500
0.250
52
NS-IX
25
12
39
2.625
1.750
0.500
0.250
50
16
4.5
23
NS-X
27
12
41
2.750
1.750
0.500
0.250
52
17
4.5
23
NS-VII
.)
in
Center of
(M
NS-VIII
Drilled Shaft
J = 0.313
6"
’DA’
Shaft Length
(see Note)
POLE SECTION
19
L
The foundations for Steel Strain Poles are pre-designed and are
based upon the following conservative soil criteria which covers
the great majority of soil types found in Florida:
Classification
=
Cohesionless (Fine Sand)
Friction Angle
=
30 Degrees (30^)
Unit Weight
=
50 lbs./cu. ft. (assumed saturated)
Note:
6" C
l.
(Min
.)
Only in cases where the Designer considers the soil types at the
specific site location to be of lesser strength properties should an
at relatively uniform sites, a single boring or sounding may cover
12 sides and round sections are permitted, provided
the outside diameter and well thickness are not reduced.
analysis be required. Auger borings, SPT borings or CPT soundings
may be utilized as needed to verify the assumed soil properties, and
Details shown on this sheet are for 12 sided
pole sections. However, sections with more than
#9 Bars
#5 Tie Bars
equally spaced
@ 1’-6"
several foundations. Furthermore, borings in the area that were
performed for other purposes may be used to confirm the
assumed soil properties.
SECTION A-A
BASE DETAILS AND TABLE OF VARIABLES
2006 FDOT Design Standards
STEEL STRAIN POLE
Last
Revision
Sheet No.
07/01/05
2 of 3
Index No.
17723
3/8 " \ Bolt
NOTE: A properly sized Service Head (Weather Head),
Flat Washer
1/2 " Bent Plate with
shall be installed and fastened securely on to the
standard pipe for each pole location. At locations
Pole Cap Plate
Cable
Hole and Slot for
1/2 " \ Bolt
Cable
Diameter
Plate
Load Thickness
Bolt
Diameter
other than service entrance, the service head face
3/16 " thick
is to be left closed to outside atmosphere. Service
(in.)
(kip)
1/2
25
1
1/2
7/16
18
7/8
1/2
3/8
11.5
3/4
1/2
1/4
3.15
3/8
1/2
3"
entrance installation per Index No. 17727.
1/2 " \ Bolt with Nut, Lock
(Typ.)
Nut and Flat Washers
45^
2"
1 1/2 " (Typ.)
(in.)
(in.)
1 1/4 " (Typ.)
2"
Pole
3/16 "
2"
2 " NPS,
2 ~ 1/4 " \ Holes for
Sch. 40 Pipe
2 ~ 3/16 " x 2" Steel
Passivated Cotter Pins
1/4 "
3"
1/4 "
V
ar
ie
s
3/4 "
WIRE ENTRANCE DETAILS
TOP VIEW
1/4 " x 2" Lifting Bar with 5/16 " \ hole and
3/8 " Nut tack welded to underside of bar
1"
1/4 "
Clevis,
Steel Clamp, ASTM A709
1/4 " thick
ASTM A709 Grade 50
Grade 50, see Table
for thickness
Min.
1/4 "
4"
1"
5/16 " \ Hole for
1/4 " \ Stainless
5 3/4 "
5"
D
3/16 "
Typ.
Steel Hex Head
11 Gage
Screws (Typ.)
Hand Hole
Cover
Threaded hole in
POLE TOP CUT-AWAY
(Option ’a’)
E
Typ.
1/4 "
tack welded cover
’J’ Hook for wiring,
1/4 "
E
clip (Typ.)
1/2 " \ commercial grade
CATENARY AND MESSENGER WIRE CLAMPS
10"
inside of pole.
10 3/4 "
D
hot rolled bar welded to
4" x 3/8 " Hand Hole Frame
NOTE: Clamps have been sized for Design Cable Loads
shown in the Table, and a Maximum Pole Diameter
made continuous with a
at the Clamp location of 2’-1".
Full Penetration Weld
Cast Aluminum Pole top
5"
6"
COVER
5"
3"
2"
2
=
HAND HOLE
FRAME
10"
1"
Weld
ASTM A500 Grade B
R
Penetration
R
1"
=
2
Full
HAND HOLE
1"
2" Pipe 2 1/4 " Long
7/
1/
3 stainless steel screws
8
"
2
"
2 1/2 " \ Hole for
cap held in place with
2"
1"
Min.
4"
Pole wall
3/16 "
Hand Hole Frame
(Option ’b’)
’C’ Hook for wiring and
lifting,
3"
1"
Partial Penetration Weld
3/8 "
POLE TOP CUT-AWAY
2 1/2 "
VIEW E-E
1/2 " \ commercial
grade hot rolled bar welded
1/4 " \ Stainless Steel
to inside of pole.
Hex Head Screw
Tack welded
cover clip (Typ.)
11 Gage
Hand Hole Cover
POLE TOP NOTE:
Any combination of the above two options may be used,
SECTION D-D
provided both lifting and wiring is accommodated.
(thru Hand Hole)
ATTACHMENT DETAILS
2006 FDOT Design Standards
STEEL STRAIN POLE
Last
Revision
Sheet No.
04
3 of 3
Index No.
17723