Structural steel estimation 02

Exercise 02 :

Find out the weight of the ladder shown in the above sketch.

Data :

ladder Height : 6 M.

Rungs of the ladder @ 300 mm c/c.

Width of the ladder : 550 mm.

Angles used for main rafters : ISA 50 X 50 X 6 @ 4.5 Kg/M.

Angles used for rungs : ISA 40 X 40 X 5 @ 3.0 Kg/M.

Solution :

1. Main angles : ISA 50 X 50 X 6 @ 4.5 Kg/M ; 2 X 6 = 12 M @ 4.5  kg/M = 54 Kg.

2. Rungs ISA 40 X 40 X 5 @ 3.0 Kg/M.

: No of rungs = ( 6000/300)  +1 = 20+1 = 21 Nos.

Weight : 21 x 0.55 M X 3 = 34.65 Kg.

Total weight : 54 + 34.65 = 88.65 Kg.

Picture3

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