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 Multiply calculated diaphragm
shear strength by 1,2
Diaphragms mechanically connected to the structure subjected to
earthquake loads or load combinations which include earthquake loads 0.400
Diaphragms mechanically connected to the structure subjected
to wind loads or load combinations which include wind loads 0.426
Diaphragms mechanically connected to the
structure subject to all other load combinations 0.400
Diaphragms mechanically connected to the structure subjected to
earthquake loads or load combinations which include earthquake loads 0.650
Diaphragms mechanically connected to the structure subjected to
wind loads or load combinations which include wind loads 0.700
Diaphragms mechanically connected to the
structure subject to all other load combinations 0.650
Diaphragms mechanically connected to the structure subjected to
earthquake loads or load combinations which include earthquake loads 0.600
Diaphragms mechanically connected to the structure subjected
to wind loads or load combinations which include wind loads 0.650
Diaphragms mechanically connected to the
structure subject to all other load combinations 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 buckling1,2
Steel Deck
type
Deck
gauge
Standard 1-1/2-
inch deep flutes,
6-inches center-
to-center 22
20
18
16
Standard 1-1/2-
inch deep flutes,
6-inches center-
to-center 22
20
18
16
Steel deck
type
Standard 1-1/2-
inch deep flutes,
6-inches center-
to-center
Moment of
inertia, I
mm 4 /mm 3'-0" 0.152
0.198
0.284
0.355 8444
11000
15778
19720 4750
6188
8875
11094
13511
17600
25244
31556 7600
9900
14200
17750
0.152
0.198
0.284
0.355
Moment of
Deck
inertia, I
gauge
mm 4 /mm
22
20
18
16
208
270
388
485
Span, < v (ft-in.)
4'-0"
5'-0"
6'-0"
ASD (plf)
3040
2111
3960
2750
5680
3944
7100
4931
LRFD (plf)
4864
3378
6336
4400
9088
6311
11360
7889
7'-0" 8'-0" 9'-0" 10'-0" 11'-0" 12'-0"
1551
2020
2898
3622 1188
1547
2219
2773 938
1222
1753
2191 760
990
1420
1775 628
818
1174
1467 528
688
986
1233
2482
3233
4637
5796 1900
2475
3550
4438 1501
1956
2805
3506 1216
1584
2272
2840 1005
1309
1878
2347 844
1100
1578
1972
Span, < v (mm)
900
192.6
250.0
359.3
449.1
1200 1500 1800 2100 2400 2700 3000 3300 3600
108.3
140.6
202.1
252.6 LSD (N/mm)
69.3
48.1
90.0
62.5
129.3
89.8
161.7
112.3 35.4
45.9
66.0
82.5 27.1
35.2
50.5
63.2 21.4
27.8
39.9
49.9 17.3
22.5
32.3
40.4 14.3
18.6
26.7
33.4 12.0
15.6
22.5
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