Base Plate Design Example

In this case the base plate may be designed as follows.

Base plate design example.

Base plate material is a36 steel and concrete compressive strength is 3 ksi. 3 1 2 on page 16. M n 0 95d 2 n b 0 80bf 2 3. Determine plate cantilever dimension m or n in direc tion of applied moment.

K min sqrt a 2 a 1 2 1 50. L 0 244. A 1 b x n 2 6e 05 mm 2 pedestal area. Tw design examples have been presented.

Typical column bases as shown below consist of a single plate fillet welded to the end of the column and attached to the foundation with four holding down bolts. Example 11 design of a column base plate. A 2 b c x d c 5 9e 05 mm 2 csa a23 3 14. L n l sqrt d x b f 4 18 7 mm.

A w10 x 49 column is supported by a concrete pier whose top surface is 19 inches x 19 inches. B 4 1 design procedure for a small moment base 1. 10 equati ns f static equilibrium and the lrfd specifi 11 0 in. I divide the factored column load by the design bearing strength of concrete and find the area of the base plate.

Design a base plate given that the column dead load is 100 kips and live load is 150 kips. N d 2 3 in b bf 2 3 in 2. Design of column base plates. Design of the base plate thickness critical section location s mm stress at the critical section location s sc s c y s y mpa design critical moment at critical section m ed plate s sc s 2 s 3 s c s 2 s 2 3 b kn m m ed plate s c y 2 s y 3 b kn m.

Select a convenient width of the base plate. Gusseted welded base plate. 2 2 base plate design for fabrication typically except for very large columns with very heavy base plates such as for high rise buildings base plates are shop welded to the column. X 0 058.

Width of base plate depth of the column section 2 thickness of gusset plate 80 mm to 100 mm. Design f beam c lumn base plates and anch r r ds using fact red l ads directly in a manner c nsistent with the 0 51 3 ksi 14 in 4 42 8 k in. F c p n f c 0 85 f c a 1 k 7717 0 kn 10 8 1 ratio 0 06 p u. The bolts are cast into the concrete base in location tubes or cones and are fitted with anchor plates to prevent pull out.

Design of column base plates.