Thursday’s 6pm ET Zoom study session is titled, “Lintels,” hosted by Jordan Truesdell, PE of Truesdell Engineering, Inc. You’ll take the first five minutes of class to answer the question alone, but if you would like to get a preview, here is a sample of the assignment. (All information needed to solve the problem will be provided during the call).
The 18 foot tall wall shown in Figure 5-1 contains an opening that measures 64 inches in length and 48 inches in height. The bottom of the opening is located 40 inches from the base of the wall. The overall length of the wall is sufficient to resist any horizontal thrust induced due to arching action. The specified compressive strength of the assembly is 1,500 psi.
The wall is constructed of 12 inch normal weight concrete masonry units laid in running bond. The lintel is to have 8 inches of bearing on each side of the opening and is assumed to be simply supported at each end. Presume normal weight masonry weighs 125 PCF and all units are laid with face shell bedding.
- Determine the maximum moment (Mmax) and shear (Vmax) within the lintel using Allowable Stress Design Methodology
- Determine the bearing stress at each end, presuming an 8" bearing length
- Select the appropriate lintel design from the NCMA charts on the following page Bonus: Determine the maximum deflection under the wall loading for uncracked masonry
The Zoom call will take place at 6pm ET Thursdays in our Zoom link: https://us02web.zoom.us/j/83922907346
It’s free for everyone, so join us.
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