masonry pilasters. The design of reinforced masonry columns is very similar and will follow the same

procedure except that stability in both directions must be considered in column design.

(1) Truss end reaction (P) = 40 kips

(2) Eccentricity (e) = 2 inches.

(3) Height of pilasters (h) = 16 feet

(4) Spacing of pilasters = 25 feet

(5) Lateral wind load on wall (w) = 20 psf

(6) The wind loading, w, acts both inward and outward.

(7) Masonry:

Type S mortar

f*m = 1350 psi

Fm = 0.33f*m = 450 psi

Em = 1000f*m =1,350,000 psi

(8) Reinforcement:

fy = 60,000 psi

Fs = 24,000 psi

Es= 29,000,000 psi

(9)

lateral wind load. The design must be checked at the top and at the mid-height of the pilaster to determine

the critical section. The design procedure is to select an economical pilaster cross section and check the

selected section for the required loading conditions.

(1) Assumptions.

to the pilasters.

in figure 9-7.

(2) Check the minimum and maximum reinforcement requirements.

As = The area of reinforcement, in2

= 6(1.00 in2) = 6.00 in2

Ag = The gross area of the pilaster, in2

= bt

Where:

b = The actual width of the pilaster = 15.62 in.

t = The actual thickness of the pilaster = 15.62 in.

Ag = (15.62 in)(15.62 in) = 244 in2

Integrated Publishing, Inc. |