RCC Structures Design
If l₁ and l₂ are the lengths of long and short spans of a two way slab simply supported on four edges and carrying a load w per unit area, the ratio of the loads split into w₁ and w₂ acting on strips parallel to l₂ and l₁ is

w₁/w₂ = (l₂/l₁)⁴
w₁/w₂ = (l₂/l₁)³
w₁/w₂ = (l₂/l₁)²
w₁/w₂ = l₂/l₁

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RCC Structures Design
An R.C.C. lintel is spanning an opening of 2 m span in a brick wall. The height of the roof is 2.9 m above the floor level and that of the opening is 2.1 m above the floor level. The lintel is to be designed for self weight plus

Triangular load + load from the roof
UDL of wall
UDL of wall + load from the roof
Triangular load of the wall

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