Product Technical Guides : US-EN Steel Deck Fastening Systems | Page 22

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