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Tutor profile: Christopher W.

Inactive
Christopher W.
Structural Engineer
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Questions

Subject: Civil Engineering

TutorMe
Question:

For a simply supported 20'-0" long steel beam, find the design bending moment (allowable stress design) given the following loading criteria: dead load = 20 plf snow load = 30 plf

Inactive
Christopher W.
Answer:

M = wl^2/8 for simply supported beams where w = uniform loading where l = design span M = (20plf + 30plf) x (20feet)^2 / 8 M = 2,500 ft-lbs

Subject: Construction

TutorMe
Question:

How many cubic yards of concrete will be required to construct an 8" thick X 20'-0" wide X 50'-0" long concrete slab-on-grade?

Inactive
Christopher W.
Answer:

An yard of concrete is equivalent to 27 cubic feet. Therefore, the solution is as follows: 8" x 1ft/12" = 0.67 ft Volume of concrete = 0.67 feet x 20 feet x 50 feet = 666.67 cubic feet 666.67 cubic feet X 1 yard/27 cubic feet = 24.70 cubic yards

Subject: Algebra

TutorMe
Question:

Solve for X: 2x-10+7x+5=0

Inactive
Christopher W.
Answer:

2x+7x=10-5 9x = 5 x = 5/9

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