Page 112 - ICC IEBC 2018

APPENDIX A

[BS] TABLE A108.1(1)
STRENGTH VALUES FOR EXISTING MATERIALS
STRENGTH VALUES
a
EXISTING MATERIALS OR CONFIGURATION OF MATERIALS
x 14.594 for N/m
Roofs with straight sheathing and roofing applied directly to the 300 lbs. per ft. for seismic shear
sheathing.
Roofs with diagonal sheathing and roofing applied directly to the 750 lbs. per ft. for seismic shear
sheathing.
Floors with straight tongue-and-groove sheathing. 300 lbs. per ft. for seismic shear
Horizontal
diaphragms Floors with straight sheathing and finished wood flooring with board 1,500 lbs. per ft. for seismic shear
edges offset or perpendicular.
Floors with diagonal sheathing and finished wood flooring. 1,800 lbs. per ft. for seismic shear
Metal deck welded with minimal welding. c 1,800 lbs, per ft. for seismic shear
d
Metal deck welded for seismic resistance. 3,000 lbs. per ft. for seismic shear
Plaster on wood or metal lath. 600 lbs. per ft. for seismic shear
Plaster on gypsum lath. 550 lbs. per ft. for seismic shear
Crosswalls b
Gypsum wallboard, unblocked edges. 200 lbs. per ft. for seismic shear
Gypsum wallboard, blocked edges. 400 lbs. per ft. for seismic shear
f' = 1,500 psi unless otherwise
Plain concrete footings. c
Existing footing, wood shown by tests
framing, structural Douglas fir wood. Same as D.F. No. 1
steel, reinforcing
steel Reinforcing steel. F = 40,000 psi maximum
y
Structural steel. F = 33,000 psi maximum
y
2
2
For SI: 1 inch = 25.4 mm, 1 square inch = 645.16 mm , 1 pound = 4.4 N, 1 pound per square inch = 6894.75 N/m , 1 pound per foot = 14.43 N/m.
a. Material must be sound and in good condition.
b. Shear values of these materials may be combined, except the total combined value should not exceed 900 pounds per foot.
c. Minimum 22-gage steel deck with welds to supports satisfying the standards of the Steel Deck Institute.
3
d. Minimum 22-gage steel deck with / -inch diameter plug welds at an average spacing not exceeding 8 inches and with sidelap welds appropriate for the deck
4
span.

2018 INTERNATIONAL EXISTING BUILDING CODE ® 93
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