Secondary framing, Channel, 3/4" sub-girt – Metal Sales Secondary Framing User Manual
Page 25
PSF-25
Secondary Framing
© Metal Sales Manufacturing Corporation/ Subject to change without notice/ Effective Date 9/11
800.406.7387 (Corporate Office) • www.metalsales.us.com
d
imensions
, s
eCTion
P
roPerTies
,
and
l
ive
l
oads
SecTion ProPerTieS For cHanneLS
1
1
/
2
" x 1
7
/
16
"
Size
Section Properties
Thickness
ga
in
Weight
plf
Ix-x
in
4
Sx
in
3
ma
K-in
18 0.050 0.762 0.0821 0.1042 3.12 0.0821 0.1042 3.12
Ix-x
in
4
Sx
in
3
ma
K-in
Top in Compression Bottom in Compression
2
Span
in Feet
Allowable Uniform Axial Loads in Pounds
0.2241
3.0178
0.260
ae
Axial Load (lbs)
M (k-ft)
3
4
5
6
0.2241
1.6500
0.250
0.2241
1.0770
0.231
0.2241
0.8000
0.204
0.2241
0.6470
0.170
1
/
8
" R (Typ.)
1
/
4
"
1
7
/
16
"
1
1
/
2
"
1
1
/
2
" Channel
1. Channels must be attached adequately to the underlying support members (purlins or joists) so that the panels remain substan-
tial in their original roll formed shape as they are being subjected to load.
2. The allowable axial loads are calculated for strength only. The Channel was not checked to determine if bearing controlled the
allowable load.
3. Channels are fully braced as per AISI Cold Formed Steel Design (2001 Edition with supplement 1) Manual requirements.
4. Section properties of the Channels are based on the requirements of the AISI Cold Formed Steel Design (2001 Edition) Manual.
5. Self weight of the Channels has to be deducted from the allowable inward load to arrive at the actual "live load" carrying
capacity.
SecTion ProPerTieS For SUB-girTS
1. Sub-Girts must be attached adequately to the underlying support members (purlins or joists) so that the panels remain substan-
tial in their original roll formed shape as they are being subjected to load.
2. The allowable spans are calculated for strength only. The Sub-Girt was not checked to determine if bearing controlled the
allowable load.
3. Sub-Girts are fully braced as per AISI Cold Formed Steel Design (2001 Edition with supplement 1) Manual requirements.
4. Section properties of the 3/4" Sub-Girts are based on the requirements of the AISI Cold Formed Steel Design (2001 Edition)
Manual.
5. Self weight of the Sub-Girts has to be deducted from the allowable inward load to arrive at the actual "live load" carrying
capacity.
6. Deflection consideration is limited by a maximum deflection ratio of l/180 of span.
99.5°
3"
1"
7
/
8
"
1
/
16
" R (Typ.)
3/4" Sub-Girt
2
Span
in Feet
Allowable Uniform (Gravity/Deflection) Loads in Pounds Per Linear Foot
140/135
132
154
Single Span
Two Span
Three or More Spans
3
4
5
6
2
3
4
5
6
62/40
59
68
35/17
33
38/33
22/9
21/20
25/17
16/5
15/11
17/10
201/194
197
230
89/57
88
102
50/24
49
58/48
32/12
32/30
37/25
22/7
22/17
26/14
22
18
ga
3
/
4
" x 3"
Size
Section Properties
Thickness
ga
in
Weight
plf
Ix-x
in
4
Sx
in
3
ma
K-in
22 0.033 0.454 0.1238 0.0281 0.843 0.0100 0.0264 0.800
Ix-x
in
4
Sx
in
3
ma
K-in
Top in Compression Bottom in Compression
3
/
4
" x 3"
18 0.050 0.677 0.0177 0.0402 1.204 0.0168 0.0400 1.185
Fy = 50 Ksi
Fy = 50 Ksi
3
/
4
"