LBA  LBS
Threaded nail - Screw with cylindrical head for plates
White galvanized carbon steel
LBA  ANKER NAIL
Threaded annular ring nail for
improved pullout strength
LBS  SCREW FOR PLATES
Screw with cylindrical underhead
ideal for fastening of standard
metal elements
CERTIFICATION
CE marking according to ETA to guarantee correct
parameters for designing structural plates in
accordance with the standard (Eurocode or other
standards)
METAL PLATES
Geometry appositely designed for fastening metal
plates and angle brackets. The underhead provides
a fixed-end constraint that improves the joint static
performance
LBA-LBS - 01
CODES AND DIMENSIONS
LBA - ANKER NAIL
d1
b
L
LBS - SCREW FOR PLATES
d1
b
L
code
PF601440
PF601450
PF601460
PF601475
PF601410
type
LBA440
LBA450
LBA460
LBA475
LBA4100
PF601660
PF601680
PF601610
LBA660
LBA680
LBA6100
code
PF603525
PF603540
PF603550
PF603560
PF603570
type
LBS525
LBS540
LBS550
LBS560
LBS570
d1 [mm]
4
6
d1 [mm]
5
TX20
L [mm]
40
50
60
75
100
b [mm]
30
40
50
60
80
pcs/box
250
250
250
250
250
60
80
100
50
70
80
250
250
250
L [mm]
25
40
50
60
70
b [mm]
21
36
46
56
66
pcs/box
500
500
200
200
200
AISI 316
A4
LBAI - STAINLESS STEEL ANKER NAIL
code
AI4050
AI6060
d1
type
LBAI450
LBAI660
d1 [mm]
4
6
L [mm]
50
60
b [mm]
40
50
pcs/box
250
250
b
L
MATERIAL AND DURABILITY
FIELD OF USE
LBA: galvanized carbon steel.
LBS: galvanized carbon steel.
To be used in Service class 1 and 2 (EN 1995:2008).
Steel to timber joints
Timber to timber joints
OSB to timber joints
LBAI: A4 stainless steel ( V4A).
To be used in Service class 1, 2 and 3 (EN 1995:2008).
EXTERNAL LOADS
LBA
LBS
FV
FV
FV
FV
FAX
FAX
FV
FV
FV
FAX
FAX
FV
LBA-LBS - 02
GEOMETRY AND MECHANICAL PROPERTIES
LBA
LBA
LBS
dk
t1
L
d1
dk
t1
L
b
de
d1
dK
d2
dUK
de
t1
dv
Nominal diameter
Head diameter
Core diameter
Underhead diameter
External diameter
Head thickness
Predrill diameter
duk
b
My,k
fax,k
fhead,k
ftens,k
Characteristic moment of yield
Characteristic value of extraction strength
Characteristic head penetration strength
Characteristic tensile strength
d2
[mm]
[mm]
[mm]
[mm]
[mm]
[mm]
[mm]
[Nmm]
[N/mm2]
[N/mm2]
[kN]
4
8,00
4,40
1,40
3,0
6
12,00
6,50
2,00
4,5
LBS
5
7,80
3,00
4,90
2,40
3,0
6500,0
7,5
6,9
19000,0
7,5
11,4
5417,2
11,7
10,5
7,9
d1
INSTALLATION
MINIMUM DISTANCES FOR NAILS / SCREWS UNDER SHEAR LOADING (STEEL-TO-TIMBER)
SCREWS / NAILS INSERTED WITHOUT PREDRILL
Load angle to the grain α = 0°
a1
a2
a3,t
a3,c
a4,t
a4,c
LBA
4
28
14
60
40
20
20
[mm]
[mm]
[mm]
[mm]
[mm]
[mm]
LBS
5
42
18
75
50
25
25
Load angle to the grain α = 90°
LBA
6
50
21
90
60
30
30
LBA
4
14
14
40
40
28
20
LBS
5
18
18
50
50
50
25
LBA
6
21
21
60
60
60
30
SCREWS / NAILS INSERTED WITH PREDRILL
Load angle to the grain α = 0°
a1
a2
a3,t
a3,c
a4,t
a4,c
LBA
4
14
8
48
28
12
12
[mm]
[mm]
[mm]
[mm]
[mm]
[mm]
grain
direction
connection
element
a2
a2
a1
a1
LBS
5
18
11
60
35
15
15
Load angle to the grain α = 90°
LBA
6
21
13
72
42
18
18
loaded
end
-90° < α < 90°
LBA
4
11
11
28
28
20
12
unloaded
end
90° < α < 270°
a2
a2
a1
a1
LBS
5
14
14
35
35
35
15
loaded
edge
0° < α < 180°
Unloaded
edge
180° < α < 360°
a4,t
a3,t
LBA
6
17
17
42
42
42
18
a4,c
a3,c
NOTES
• Minimum distances consistent with EN 1995:2008 and in accordance with ETA,
• assuming a timber density ρk ≤ 420 kg/m3.
• For timber-to-timber joints, the minimum spacing (a1, a2) have to be multiplied
by a coefficient equal to 1,5.
LBA-LBS - 03
STATIC VALUES
LBA
FV
L
b
Fax
SPLATE
Fax
FV
d1
CHARACTERISTIC VALUES (1)
d1
[mm]
L
[mm]
b
[mm]
4
40
50
60
75
100
6
60
80
100
30
40
50
60
80
SPLATE
1,5 mm
2,02
2,32
2,48
2,64
2,96
SPLATE
2 mm
2,01
2,32
2,48
2,64
2,96
50
70
80
2,56
3,43
4,27
2,53
3,41
4,27
SHEAR STEEL-TO-TIMBER RV,k [kN]
SPLATE
SPLATE
SPLATE
2,5 mm
3 mm
4 mm
2,00
1,98
1,95
2,32
2,32
2,32
2,48
2,48
2,48
2,64
2,64
2,64
2,96
2,96
2,96
3,39
4,19
4,75
4,24
5,00
5,24
4,20
5,00
5,24
ADMISSIBLE VALUES
SPLATE
5 mm
1,93
2,32
2,48
2,64
2,96
SPLATE
6 mm
1,90
2,32
2,48
2,64
2,96
TENSION
Rax,k
[kN]
0,96
1,28
1,60
1,92
2,56
4,16
5,00
5,24
4,13
5,00
5,24
2,40
3,36
3,84
SHEAR
Vadm
[kg]
71
71
71
71
71
TENSION
Nadm
[kg]
38
51
64
77
102
141
141
141
96
134
154
LBS
FV
L
b
Fax
SPLATE
Fax
FV
d1
CHARACTERISTIC VALUES (2)
d1
[mm]
L
[mm]
b
[mm]
5
25
40
50
60
70
21
36
46
56
66
SPLATE
1,5 mm
0,90
1,48
1,86
2,05
2,20
SPLATE
2 mm
0,88
1,46
1,85
2,05
2,20
SHEAR STEEL-TO-TIMBER RV,k [kN]
SPLATE
SPLATE
SPLATE
2,5 mm
3 mm
4 mm
0,87
0,98
1,23
1,44
1,58
1,88
1,83
1,92
2,12
2,05
2,15
2,34
2,20
2,30
2,50
SPLATE
5 mm
1,47
2,15
2,35
2,52
2,68
ADMISSIBLE VALUES
SPLATE
6 mm
1,43
2,11
2,35
2,50
2,66
TENSION
Rax,k
[kN]
1,31
2,25
2,87
3,50
4,12
SHEAR
Vadm
[kg]
53
53
53
53
53
TENSION
Nadm
[kg]
53
90
115
140
165
GENERAL PRINCIPLES
NOTES
• Characteristic values are consistent with EN 1995:2008 and in accordance with ETA.
• Design values can be obtained from characteristic values as follows:
(1) The characteristic shear-strength value for LBA Ø4 nails has been evaluated
Coefficients γm and kmod must be taken according to the current Standard adopted
for the design.
For calculations, a timber density ρk = 380 kg/m3 has been considered.
• Dimensioning and verification of timber elements and metal plates must be carried
out separately.
• Characteristic values of shear strength are evaluated for nails/screws inserted without
predrill; in case of nails/screws inserted with predrill it is possible to obtain higher
strength values.
• Admissible values are obtained according to DIN 1052:1988.
assuming a plate thickness = SPLATE , always considering the case of thick plate
according to ETA (SPLATE ≥ 1,5 mm).
The characteristic shear-strength value for LBA Ø6 screws has been evaluated
assuming a plate thickness = SPLATE , and considering the thin
(SPLATE ≤ 2,0 mm), and thick-plate case scenarios (2,0 < SPLATE < 3,0 mm)
according to ETA (SPLATE ≥ 3,0 mm).
(2) The characteristic shear-strength value for LBS Ø5 screws has been evaluated
assuming a plate thickness = SPLATE , and considering the thin (SPLATE ≤ 0,5 d1),
intermediate (0,5 d1 < SPLATE < d1) and thick-plate case scenarios (SPLATE ≥ d1).
(3) The pullout strength of the threaded part has been determined by considering
an fastener angle to the grain of 90° and a penetration length equal to b.
LBA-LBS - 04