NCMA TEK

Sized to provide sufficient design strength. Further informa-tion on determining design loads for lintels is included inAllowable Stress Design of Concrete Masonry Lintels, TEK17-1A (ref. 3).Nominal lintel strength is determined based on thestrength design provisions of ACI 318 and then reduced bystrength reduction factors, called phi ( ) factors. Thesefactors account for any variability in materials and construc-tion practices. The resulting capacity needs to equal or exceedthe factored loads. Precast concrete strength reduction factorsare and for flexure and shear, respectively (ref. 2).

sized to provide sufficient design strength. Further informa-tion on determining design loads for lintels is included in Allowable Stress Design of Concrete Masonry Lintels, TEK 17-1A (ref. 3).

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  Ncma tek, Ncma, Tek 17

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