Steel Deck Fastening Systems
1.1 Steel Deck Fastener Design and Selection
Steel deck diaphragm stiffness and flexibility factor design equations :
E x t G ' =
3.78 + 0.9 x D , kips / in . ( Eq . 3.3-3 ) n
+ C
F = 1000 , micro-inches / lb G '
E = modulus of elasticity for steel = 29,500 ksi Table 7 – Diaphragm strength ( S ) and stiffness factor ( G ') equation variable values
Deck type
1-1 / 2 " Wide Rib B- Deck or BI- Deck
Fastener pattern α 1
– end distribution factor α 2
– purlin distribution factor
Sx e2
, in . 2
Sx 2 p
, in . 2
With :
C = 29,500 x t ( Eq . 3.3-1 ) α 1
+ α 2 + n s x S f w x S x x < x 12 f S s
D
D n
= ( Eq . 3.3-2 )
< x 12
Reference Tables 7 and 9 for description and values of other variables for common conditions .
A
(
1
)
D-Warping constant , in .
N , ft -1 22 GA 20 GA 18 GA 16 GA
36 / 11 |
3.667 |
3.667 |
1944 |
1944 |
2 |
3.000 |
1548 |
1164 |
756 |
540 |
36 / 9 |
3.000 |
3.000 |
1656 |
1656 |
2 |
2.333 |
1548 |
1164 |
756 |
540 |
36 / 7 |
2.000 |
2.000 |
1008 |
1008 |
1 |
2.000 |
1548 |
1164 |
756 |
540 |
36 / 5 |
1.667 |
1.667 |
936 |
936 |
1 |
1.333 |
9096 |
6804 |
4464 |
3144 |
36 / 4 |
1.333 |
1.333 |
720 |
720 |
1 |
1.000 |
12864 |
9624 |
6312 |
4452 |
36 / 3 |
1.000 |
1.000 |
648 |
648 |
1 |
0.667 |
26508 |
19824 |
13008 |
9180 |
Table 8 – Diaphragm strength ( S ) equation variable values
Deck type
B
Min . deck tensile ( yield ) strength , ksi
45 ( 33 )
92 ( 80 )
BI 45 ( 33 )
B or BI
45 or 92 ( 33 or 80 )
Configuration
Frame fastener base material thickness , in .
X-HSN 24 1 / 8 ≤ t f
< 3 / 16
X-HSN 24 3 / 16 ≤ t f
≤ 3 / 8 X-ENP-19 t f
≥ 1 / 4
S-MD 12-24x1-5 / 8 M HWH5 0.0598 ≤ t f
≤ 1 / 4
X-HSN 24 1 / 8 ≤ t f
< 3 / 16
X-HSN 24 3 / 16 ≤ t f
≤ 3 / 8 X-ENP-19 t f
≥ 1 / 4
S-MD 12-24x1-5 / 8 M HWH5 0.0598 ≤ t f
≤ 1 / 4
X-HSN 24 1 / 8 ≤ t f
< 3 / 16
X-HSN 24 3 / 16 ≤ t f
≤ 3 / 8
S-MD 12-24x1-5 / 8 M HWH5 0.0598 ≤ t f
≤ 1 / 4
X-HSN 24 1 / 8 ≤ t f
≤ 3 / 8 X-ENP-19 t f
≥ 1 / 4
S-MD 12-24x1-5 / 8 M HWH5 0.0598 ≤ t f
≤ 1 / 4
22 ( 0.0295 )
Deck gauge ( inches )
20 ( 0.0358 )
18 ( 0.0474 )
16 ( 0.0598 )
Q
Sidelap f
, lb Q s , lb Q f
, lb Q s
, lb Q f , lb Q s
, lb Q f , lb Q s
, lb connector 1 , 2 Correlation Correlation Correlation Correlation factor , c factor , c factor , c factor , c
Hilti SLC
Hilti SLC
Hilti SLC
Hilti SLC
Hilti SLC
Hilti SLC
Hilti SLC
Hilti SLC
Hilti SLC
Hilti SLC
Hilti SLC
Hilti # 10 HWH Screw
Hilti # 10 HWH Screw
Hilti # 10 HWH Screw
1 Sidelap connector spacing must meet the requirements of Table 10 . 2 Reference Table 3 and Section 1.5 for more information on the proper selection of Hilti Sidelap Connectors ( SLC ).
1357 844 1824 1260 1865 1701 – – 1.155 1.172 1.203 – 1590 844 2107 1260 2663 1701 3035 2024 1.121 1.102 1.066 1.028 1597 844 2112 1260 2764 1701 3079 2024 1.257 1.205 1.106 1.000 1193 717 1661 870 1860 1152 1860 1453 1.000 1.000 1.000 1.000 1357 844 1824 1260 1865 1701 – – 1.155 1.172 1.203 – 1941 954 2208 1341 2698 1859 3095 2343 1.052 1.054 1.058 1.062 1964 954 2165 1341 3022 1859 3577 2343 1.197 1.166 1.108 1.046 1193 717 1661 870 1860 1152 1860 1453 1.000 1.000 1.000 1.000 1357 844 1712 1111 1865 1591 – – 1.155 1.172 1.203 – 1516 882 1712 1111 2450 1591 2553 2051 1.284 1.233 1.140 1.040 1193 717 1661 870 1860 1152 1860 1453 1.000 1.000 1.000 1.000 1489 633 1795 769 2348 1018 2924 1284 1.000 1.000 1.000 1.000 1603 633 1933 769 2529 1018 3149 1284 1.000 1.000 1.000 1.000 1193 633 1661 769 1860 1018 1860 1284 1.000 1.000 1.000 1.000
18 Hilti , Inc . ( US ) 1-800-879-8000 | www . us . hilti . com I en español 1-800-879-5000 I Hilti ( Canada ) Corp . 1-800-363-4458 I www . hilti . ca I PTG Decking Supplement 2014