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[BS] A113.9 Truss and Beam Supports
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Where trusses and beams other than rafters or joists are supported on masonry, independent secondary columns shall be installed to support vertical loads of the roof or floor members.
Exception: Secondary supports are not required where SD1 is less than 0.3g.
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Los Angeles Existing Building Code > A Guidelines for the Seismic Retrofit of Existing Buildings > A113 Detailed System Design Requirements > A113.9 Truss and Beam Supports
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