Fbrg = 0.25(f'm) = 0.25(1350 lb/in2) = 337 lb/in2

Fbrg = 337 lb/in2 > fbrg(max) = 176 lb/in2

...Bearing O.K.

(4) *Summary. *The 8-inch 24-inch CMU lintel reinforced with 2-#14 bars is sufficient.

(1) *Given.*

fy = 60,000 psi

Fs = 24,000 psi

Es = 29,000,000

(2) *Problem. *Design the lintel over the doors.

(3) *Solution. *The three masonry courses above the opening will be solidly grouted and used as the

lintel. The masonry lintel will be analyzed as a braced frame member. The ACI 318 moment and shear

coefficients will be used to determine the approximate design moments and shears.

approximate method. Determine the maximum moment envelope using the ACT 318 moment coefficients.

Where:

wtot = w+ wDL + wLL

And;

w = The lintel weight, lb/ft

= (92 psf)(2 ft) = 184 lb/ft

wtot = 184 + 150 + 600 = 934 plf

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