Roof joists are spaced at 1.5m and span 6m between supporting girders, and joist depth of 500mm. The allowable deflection limits for OWSJ are L/360 under snow load. The OWSJS are subjected to a dead load of 1.75kPa which includes the estimate joist weight of 0.1kPa, an occupancy load of 2.4kPa, and the following: SULS = 2.30kPa SSLS = 1.65kP

a. Select a suitable OWSJ which satisfies the limit states design.

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