A ridge board doesn't support rafters of the bridge whereas a ridge beam does.
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An inverted beam is a beam whose bottom is the same as the slab. A drop beam is a beam that is put under the structural member it supports.
Rcc beam is supported between two support to carry the structure
When steel bars are placed on both sides of a concrete beam, one side resists tensile forces and the other side resists compressive forces. The presence of tension or compression on top or bottom depends on the type of structure.
cross beam, crossbeam1. A large beam between two walls.2. A girder that holds the sides of a building together.3. Any beam that crosses another.4. A strut between the walings on opposite sides of an excavation.5. A beam which runs transversely to the center line of a structure.6. Any transverse beam in a structure, such as a joist.AdvertisementAbove retrieved from Answers.comViper1
cross beam, crossbeam1. A large beam between two walls.2. A girder that holds the sides of a building together.3. Any beam that crosses another.4. A strut between the walings on opposite sides of an excavation.5. A beam which runs transversely to the center line of a structure.6. Any transverse beam in a structure, such as a joist.AdvertisementAbove retrieved from Answers.comViper1