The allowable range for web openings is defined relative to the total length of the beam span denoted as L. The outer quarters of the span length at each end, measuring one-fourth of the length, must remain solid with no openings. The central half of the span length is designated as the area available for web openings.
L = LENGTH OF BEAM NO OPNG L/4 OPENINGS L/2 NO OPNG L/4 AREA AVAILABLE FOR OPENINGS RANGE OF WEB OPENINGS ALONG LENGTH OF BEAM
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