USG Exterior Ceiling Applications Systems Guide - Manual (Page 34)

33 USG Exterior Ceiling Applications
Wind Uplift Resistance for Exterior Soffitts
USG Drywall Suspension System
compression
post
cross tee
main tee
C
D
B
A
hanger wire
Component Spacing
Max Spacing (in.)
Test
Record UL
Class Max
Uplift Load
(PSF) Equivalent
Wind Speed,
(MPH) (A)
Main
Runner (B)
Cross Tee (C)
12 Gauge
Hanger Wire (D)
Compression
Post Exterior soffit
Panels Plenum
Height¹
(in) Max
compression
post load (lbs) Test
Standard
UL526
page 36 15 15 77 48 24 24 24 Single layer 5/89
gypsum panels 141 183.2 UL 580
UL526A, B
page 37 15 15 77 48 16 (526A)
24 (526B) 48 30 single layer 1/29
gypsum panels 128 229 UL 580
UL526C
page 38 30 30 108 24 24 48 30 single layer 1/29
gypsum panels 130 225 UL 580
UL526D
page 39 60 60 188 24 24 48 42 double layer 5/89
gypsum panels 76 525 UL 580
UL526E
page 40 90 90 188 24 24 48 30 double layer 5/89
gypsum panels 76 525 UL 580
UL526F
page 41 90 90 188 24 16 48 24 Single layer 5/89
gypsum panels,
single layer 3/89
plywood 76 525 UL 580
NOA No. 12-
0924.03
page 42 N/A +75, -75 171 24 16 24 24 single layer 1/29
or 5/89 glass mat
sheathing w/ direct
applied EFIS 24 300 TAS 202,
TAS 203
1 Larger plenum heights require compression post size and gauge to be determined by a quaified structural engineer.