Hybrid Bridge Girders
Hybrid Bridge Girders Computation of bending stresses and allowable stresses is generally the same as that for girders with uniform yield strength. The bending stress in the web, however, may…
Roof Snow Load
Roof Snow Load Some building codes and ASCE 7-95 specify an equation that takes into account the consequences of a structural failure in view of the end use of the…
Over pressure
Over pressure Air concussion is also referred to as “overpressure,” that is, the air pressure over and above normal air pressure. The difference between noise and concus- sion is the…
Langefors’ Formula
Langefors’ Formula Langefors suggested that the burden determination was based on more factors, including diameter of hole, weight strength of explosives, degree of packing, a rock constant, and the degree…
Anderson Formula
Anderson Formula Anderson Formula One of the first of the modern blasting formulas was developed by O. Andersen. He developed his formula on the premise that burden is a function…
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