A column with a horizontal member attached at the top subjected to a vertical lo

Question

A column with a horizontal member attached at the top subjected to a vertical load. Column is braced along y-y axis and there are no lateral loads. The moment connection is at the top. Picture is listed below

Data:

footing reinforcement, fy: 60ksi

footing concrete: 5,000 psi

allowable soil bearing pressure, q: 6,000psf

structural shapes: A992

Base plate steel: A36

Ignor the self-weight of the W14 column in calculations

Determine:

a. determine the max tension in anchor bolts due to service loads

b. determine the lightest W14 column for the given loads

(please show the process on how this was done so I can learn from it. Thank you in advance)

4-0100 kips 4.4"-- 4'-0" 100 kips (LIVE LOAD) W14 x 20'-0" 50 kips (DEAD LOAD) GROUND LINE 1-6" 1 BASE // 2" NONSHRINK GROUT PLATE 8-4" ELEVATION ÇBOLTS BOLTS 3" 3" 30" L = 26" BASE PLATE

Explanation / Answer

1) Why eccentricity of Load is Important sometimes----In practice, columns invariably transmit axial load and moment to the footing. In such cases the soil reaction below the footing will not be uniform if the column is placed cetrally on the footing. the moment may be replaced by an axial load P acting at an eccentricity e= M/P , Hence a column may be placed at an eccentricity e so that the soil pressure becomes uniform.

2) Solution ---

will upload soon..

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