Page 233 - ICC IEBC 2018

RESOURCE A

TABLE 1.3.1
WOOD FRAME WALLS
0″ TO LESS THAN 4″ THICK
PERFORMANCE REFERENCE NUMBER REC.
ITEM CODE THICKNESS CONSTRUCTION DETAILS NOTES
LOAD TIME PRE-BMS-92 BMS-92 POST-BMS-92 HOURS
Solid wall: 2 / ″ wood-wool slab core; / ″
3
1
3
4
W-3-W-1 3 / ″ gypsum plaster each side. 4 N/A 2 hrs. 7 1, 6 2
4
3
7
16
W-3-W-2 3 / ″ 2 × 4 stud wall; / ″ thick cement asbestos 360 psi 10 1 2-5 1 / 6
8
net area min.
board on both sides of wall.
40
7
W-3-W-3 3 / ″ Same as W-3-W-2 but stud cavities filled 360 psi min. 1 2-5 2 / 3
2
8
net area
with 1 lb./ft. mineral wool batts.
For SI: 1 inch = 25.4 mm, 1 pound per square inch = 0.00689 MPa.
Notes:
1. Achieved “Grade C” fire resistance (British).
2. Nominal 2 × 4 wood studs of No. 1 common or better lumber set edgewise, 2 × 4 plates at top and bottom and blocking at mid height of wall.
3. All horizontal joints in facing material backed by 2 × 4 blocking in wall.
4. Load: 360 psi of net stud cross sectional area.
5. Facings secured with 6d casing nails. Nail holes predrilled and 0.02 inch to 0.03 inch smaller than nail diameter.
6. The wood-wool core is a pressed excelsior slab which possesses insulating properties similar to cellulosic insulation.

214 2018 INTERNATIONAL EXISTING BUILDING CODE ®
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