Lintel Size Chart
A lintel size chart is only a starting reference. The working calculator checks actual opening width, tributary wall height, line load, bearing and trial section properties.
lintel size chart lintel size calculator by span and load window lintel calculator
Simple-span moment
M = w * L^2 / 8 + P * L / 4
Required section modulus
S_required = M / Fb_allowable
Chart caution
Final lintel and header sizes still need code tables or engineered design for material, bearing, connections, bracing and load combinations.
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