Steel bar joists bear across a central steel beam with a 6x wood nailer matching the beam flange width between the bar joists. The wood nailer is fastened with 7/8 inch diameter wood screws at 12 inches on center, staggered, with a 1 inch maximum dap. Steel bar joists feature angle braces measuring 4x4x1/4 at each joist typically, welded with 3/16 inch fillet welds and field weld symbols. The angle braces connect to the steel beam and joist web members, with additional notes specifying that angle braces must be welded to the beam after the roof is installed, coordinated with sprinkler pipes, and located within 6 inches of the top chord panel point unless an auxiliary web is installed.
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