Punching shear is a critical failure mode in reinforced concrete slabs, particularly around column connections. It occurs when a concentrated load, such as that from a column, causes the concrete ...

Refer to the ACI Code for specific applications of these formulas. Negative moment at face of all supports for ( a) slabs with spans not exceeding 10 ft (3 m) and ( b) beams and girders where the ...

The elevated tracks present another hazard: falling debris. After a wooden beam fell off a 7 train platform in Queens and ...