Steel Deck Fastening Systems
1.1 Steel Deck Fastener Design and Selection
Table 11 – Conversion factors for Allowable Stress Design ( ASD ), Load Resistance Factor Design ( LRFD ) and Limit States Design ( LSD )
Design method
ASD
LRFD
LSD
For
Diaphragms mechanically connected to the structure subjected to earthquake loads or load combinations which include earthquake loads
Diaphragms mechanically connected to the structure subjected to wind loads or load combinations which include wind loads
Diaphragms mechanically connected to the structure subject to all other load combinations
Diaphragms mechanically connected to the structure subjected to earthquake loads or load combinations which include earthquake loads
Diaphragms mechanically connected to the structure subjected to wind loads or load combinations which include wind loads
Diaphragms mechanically connected to the structure subject to all other load combinations
Diaphragms mechanically connected to the structure subjected to earthquake loads or load combinations which include earthquake loads
Diaphragms mechanically connected to the structure subjected to wind loads or load combinations which include wind loads
Diaphragms mechanically connected to the structure subject to all other load combinations
Multiply calculated diaphragm shear strength by 1 , 2
0.400
0.426
0.400
0.650
0.700
0.650
0.600
0.650
0.600
1 Conversion factors determined from Table D5 , of AISI S100 . 2 Diaphragm capacities should be limited to the respective ASD , LRFD and LSD buckling diaphragm shear capacities found in Table 12 .
Table 12- ASD and LRFD diaphragm shears ( plf ) and LSD diaphragm shears ( N / mm ) for buckling , S buckling
1,2
Steel Deck type
Standard 1-1 / 2- inch deep flutes , 6-inches centerto-center
Standard 1-1 / 2- inch deep flutes , 6-inches centerto-center
Steel deck type
Standard 1-1 / 2- inch deep flutes , 6-inches centerto-center
Deck gauge
Moment of inertia , I mm 4 / mm
Span , < v
( ft-in .) 3 ' -0 " 4 ' -0 " 5 ' -0 " 6 ' -0 " 7 ' -0 " 8 ' -0 " 9 ' -0 " 10 ' -0 " 11 ' -0 " 12 ' -0 "
ASD ( plf ) |
22 |
0.152 |
8444 |
4750 |
3040 |
2111 |
1551 |
1188 |
938 |
760 |
628 |
528 |
20 |
0.198 |
11000 |
6188 |
3960 |
2750 |
2020 |
1547 |
1222 |
990 |
818 |
688 |
18 |
0.284 |
15778 |
8875 |
5680 |
3944 |
2898 |
2219 |
1753 |
1420 |
1174 |
986 |
16 |
0.355 |
19720 |
11094 |
7100 |
4931 |
3622 |
2773 |
2191 |
1775 |
1467 |
1233 |
LRFD ( plf ) |
22 |
0.152 |
13511 |
7600 |
4864 |
3378 |
2482 |
1900 |
1501 |
1216 |
1005 |
844 |
20 |
0.198 |
17600 |
9900 |
6336 |
4400 |
3233 |
2475 |
1956 |
1584 |
1309 |
1100 |
18 |
0.284 |
25244 |
14200 |
9088 |
6311 |
4637 |
3550 |
2805 |
2272 |
1878 |
1578 |
16 |
0.355 |
31556 |
17750 |
11360 |
7889 |
5796 |
4438 |
3506 |
2840 |
2347 |
1972 |
Deck gauge |
Moment of inertia , I mm 4 / mm |
900 |
1200 |
1500 |
1800 |
Span , < v ( mm )
2100
2400
|
2700 |
3000 |
3300 |
3600 |
LSD ( N / mm ) |
22 |
208 |
192.6 |
108.3 |
69.3 |
48.1 |
35.4 |
27.1 |
21.4 |
17.3 |
14.3 |
12.0 |
20 |
270 |
250.0 |
140.6 |
90.0 |
62.5 |
45.9 |
35.2 |
27.8 |
22.5 |
18.6 |
15.6 |
18 |
388 |
359.3 |
202.1 |
129.3 |
89.8 |
66.0 |
50.5 |
39.9 |
32.3 |
26.7 |
22.5 |
16 |
485 |
449.1 |
252.6 |
161.7 |
112.3 |
82.5 |
63.2 |
49.9 |
40.4 |
33.4 |
28.1 |
1 Load values based upon a safety factor ( Ω ) of 2.00 for ASD , a phi factor ( Φ ) of 0.80 for LRFD or a phi factor ( Φ ) of 0.75 for LSD .
2 Diaphragm shears in this table are for steel deck buckling failure mode only and are to be used as prescribed in Section 1.1.8 . If design condition is not tabulated , diaphragm shears for buckling may be calculated using the following equations :
For ASD , S buckling
= ( I x 10 6 /(< v ) 2 ) / 2.0 , plf
For LRFD , S buckling
= ( I x 10 6 /(< v ) 2 ) x 0.8 , plf
For LSD , S buckling
= ( I x 10 6 /(< v ) 2 ) x 0.75 , N / mm
20 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