PLAN Square Base Plate, A1, in2 Finding Size of Plate ( in x in) FINDING THICKNESS OF PLATE (__in) Square Concrete Pedestal, A2, in2 Basic Sizing of.

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Presentation transcript:

PLAN Square Base Plate, A1, in2 Finding Size of Plate ( __in x __in) FINDING THICKNESS OF PLATE (__in) Square Concrete Pedestal, A2, in2 Basic Sizing of Square Base Plate on a Square Column Pedestal

STRESS X AREA= LOAD KNOWNS Fc’ = Concrete Ultimate Strength, ksi. Pu = Factored Load on Base Plate from Column, kips

L ARGEST OF THREE CANTILEVERS FOR THICKNESS CALCULATIONS SECTION X-X PLAN

Design a base plate for a W12 x 87 column supporting a service dead load of 65 kips and a service live load of 195 kips. The support will be a 16-inch x 16-inch concrete pier. Use A36 steel and = 3.5ksi. Use LRFD. W12 x 87 = 390k = 16x16= 256 = 36ksi = 3.5ksi CONCRETE PEDESTAL, (16” x 16”) PLATE W12 X 87 m n

USE 14” X 14” PLATE

PLATE (14” x 14”) 0.8 b = 0.8x12.1= 9.68 f 0.95d = 0.95x12.5 = m=1.063” n= 2.16”

t is available in increments upto 2.5” t is available in increments from 2.5”- 5”, OK USE 14” x 14” x PLATE