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Steel Designers' Manual - 6th Edition (2003)
The
Steel Construction
Institute
Silwood Park, Ascot, Berks SL5 7QN
Problem
Worked examples 425
Subject
COLUMN EXAMPLE 1
Chapter ref.
ROLLED UNIVERSAL
COLUMN
15
Design code Made by DAN Sheet no.
BS 5950: Part 1 Checked by GWO
Check the ability of a 203 ¥ 203 ¥ 52 UC in S275 steel to withstand
an axial compressive load of 1250 kN over an unsupported height of
3.6 m assuming that both ends are held in position but are provided
with no restraint in direction. Design to BS 5950: Part 1.
The problem is as shown in the sketch.
3.6m
II
Take effective length LE = 1.0 L Table 22
\ L E = 1.0 ¥ 3.6 ¥ 10 3
= 3600 mm
On the assumption that weak axis flexural buckling will govern Table 23
determine compressive strength p c from Table 24 curve c
A = 66.4 cm 2 b/T = 8.16 Steelwork
Design Guide
ry = 5.16 cm d/t = 20.1 Vol 1
Since T < 16 mm take p y = 275 N/mm 2 Table 9
Check section classification for pure compression. 3.5
Need only check section is not slender; Table 11
for outstand b/T £ 15e
1