Authorization of dayworks
Some extra work ordered may be paid for at dayworks rates. This is adopted when no unit rates seem applicable, […]
Axial-Force Members
In an axial-force member, the stresses and strains are uniformly distributed over the cross section. Typically examples of this type
Axial Tension
L = length of connection in the direction of loading, in Larger values of U are permitted when justified by tests
Basic Allowable Stresses for Bridges
Table 11.16 lists the basic allowable stresses for highway bridges recommended in AASHTO Standard Specifications for Highway Bridges for ASD.
Basic Allowable Stresses
Table 11.29 lists the allowable stresses for railroad bridges recommended in the AREMA Manual. The stresses, ksi, are related to the
Bases for ASD and LRFD
ASD is based on elastic theory. Design limits the maximum unit stress a member is permitted to bear under service loads
Bar Supports
Bar supports are commercially available in three general types of material: wire, precast concrete, and all-plastic. Descriptions of the various types
Automatic Sprinklers
In the past fifteen years the variety of sprinklers available has grown tremendously. Years ago an engineer would simply specify
Background Thaumasite form of sulfate attack
Although thaumasite had been known as a rare calcium carbonate-silicate- sulfate hydrate of the composition CaCO3.CaSiO3.CaSO4.15H2O since 1878, it was