AMPLE-
Find the load carrying capacity of ISHB 350 @ 661.19 N/m.
The effective length of the column is 3.6 m with respect to
x-axis and 2.8 m with respect to y-axis. The properties of I-Section
= 149.3 mm and ryy
= 53.4 mm, fy = 300 N/mm2.
Answers
Answer:
batten column consist of two ISMC 300 @ 351.2 N/mm placed back-to-back, is carrying a
factored load of 1000 kN. The built-up column is restrained in position but not in direction at
both ends. The minimum spacing of the channels should be 4
(a) 183.1 mm
Sol: Relevant properties of ISMC 300 [ Table II SP 6 (1): 1964]
= 4564 mm2
, = 118.1 mm, = 26.1mm
= 90 mm, = 23.6mm = 13.6 mm
= 6362.6 × 104 mm4
= 310.8 × 104 mm4
2 = 2 [ + (
2
+ )
2
]
or 2 × 6362.6 × 104 = 2 × [310.8 × 104 + 4564 (
2
+ 23.6)
2
]
⇒ = 183.1 mm
Q.2 A batten column consist of two ISMC 300 @ 351.2 N/mm placed back-to-back, is carrying a
factored load of 1000 kN. The built-up column is restrained in position but not in direction at
both ends. If the length of the column is 9-m, the battens can be provided with