An example of the uniform equivalent apex load calculation follows. Hollow masonry block weights for determining uniform equivalent apex load on lintel: 6" block weight = 32 psf (Hollow) 12" block weight = 50 psf (Hollow) Equivalent load of apex area = .33 WL Effective span "L" of lintel (centerline of bearing to centerline of bearing).
Lintel Spec Guide York Building Products
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