Product Technical Guides : US-EN Direct Fastening - Volume 1 Edition 22 | Page 162

3.5.1.5 FASTENER QUANTITY ESTIMATION
Table 4 — Frame fasteners per square of roof 1 , 2 , 3
Fastener pattern
Fastener spacing
Support spacing , ft 4.0 4.5 5.0 5.5 6.0 6.5 7.0 8.0 9.0 10.0
36 / 14
6 "
107
95
87
79
73
68
64
57
51
47
36 / 11
6 "
81
72
66
60
56
52
48
43
39
36
36 / 9
6 "
63
57
52
47
44
41
38
34
31
28
36 / 7
6 "
55
49
45
41
38
35
33
30
27
25
36 / 5
6-12-12-6
37
33
31
28
26
24
23
21
19
17
36 / 4
12 "
29
26
24
22
20
19
18
16
15
14
32 / 5
8 "
42
37
34
31
29
27
25
23
21
19
32 / 3
16 "
22
20
18
17
16
15
14
13
12
11
30 / 4
6-18-6
34
30
28
26
24
22
21
19
17
16
30 / 3
12-18
23
21
19
18
17
16
15
13
12
11
24 / 5
6 "
55
49
45
41
38
35
33
30
27
25
24 / 3
6 "
29
26
24
22
20
19
18
16
15
14
24 / 4
8 "
42
37
34
31
29
27
25
23
21
19
1 Hilti Profis DF Diaphragm software also estimates fastener quantities . 2 Estimated quantities are for one square of decking . A square of roof decking is an area of 100 ft 2 . No provision is made for waste .
Perimeter fastening spacing is based on 12 " on-center assumption . 3 For interlocking sidelaps , add 15 % to quantities in table .
Sidelap fastener estimation
To estimate the number of sidelap screws on a steel roof or floor deck project , multiply the total deck area in square feet times the number of required stitch screws per span and then divide by the sheet width times the joist spacing ( both in feet ). A 5 % contingency is also recommended for waste and loss .
Example :
Total area : ........ 50,000 square feet
Sheet width : ....... 36 " = 3 ft Joist spacing : ...... 5 ft No . of sidelap fasteners per span : 5
# of screws needed = 50,000 ft 2 x 5 x 1 . 05 = 17 , 500 3 ft x 5 ft
3.5.1.6 COMMON STEEL DECK DIMENSIONS
Table 5 — Common steel deck types and dimensions 1 , 3
Deck type
B
Common thickness
16-24 GA
2.5 "
Standard dimensions
6 "
1.5 "
Table 6 — Steel deck gauge ( GA ) inch and millimeter equivalent 2 , 3
Gauge ( GA )
Nominal sheet steel thickness , t mils ( mm )
1.75 "
36 "
16 54 ( 1.52 )
6 "
1.75 "
2.5 " 3.5 "
18 43 ( 1.21 )
BI
N
16-24 GA
16-22 GA
2.75 "
1.75 "
3-7 / 8 "
36 "
8 "
24 "
4-1 / 8 "
8 "
0.75 " 1.5 "
3 "
20 33 ( 0.91 )
22 27 ( 0.76 )
1 Dimensions shown are typical . However , the Structural Engineer should always consult with the steel deck manufacturer on the dimensions for the specific product as they can vary depending on the manufacturer .
2 Deck gauge inch equivalents taken from SDI Diaphragm Design Manual . Millimeter equivalents taken from CSSBI Design of Steel Deck Diaphragms .
3 Calculations to produce diaphragm shear values with the deck profiles and gauges shown are possible with Hilti Profis DF Diaphragm software .
N-32 16-22 GA
3 "
THE ABOVE FOOTNOTES APPLY TO TABLES 5 AND 6 .
2-1 / 8 "
32 "
F
18-22 GA
1.75 "
6 "
1.5 "
0.5 "
36 "
Composite Deck
16-22 GA
1 "
7.25 "
12 "
3 "
0.75 "
4.75 "
36 "
Form Deck
24-28 GA
1.5 " 2.5 "
1 "
30 "
9 / 16 "
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