Cross bracing

From Wikipedia, the free encyclopedia
Jump to navigation Jump to search
Cross bracing between joists or rafters strengthens the members by preventing sideways deflection. This bracing is known by many names such as herringbone strutting, blocking, bridging, and dwanging.
Cross bracing on a bridge tower

In construction, cross bracing is a system utilized to reinforce building structures in which diagonal supports intersect. Cross bracing is usually seen with two diagonal supports placed in an X-shaped manner. Under lateral force (such as wind or seismic activity) one brace will be under tension while the other is being compressed. In steel construction, steel cables may be used due to their great resistance to tension (although they cannot take any load in compression). The common uses for cross bracing include bridge (side) supports, along with structural foundations. This method of construction maximizes the weight of the load a structure is able to support. It is a usual application when constructing earthquake-safe buildings.[1]

Cross bracing can be applied to any rectangular frame structure, such as chairs and bookshelves.

Cross bracing may employ full diagonals, or corner bracing[2] or knee bracing.[3]

References[edit]

  1. ^ Reinforce Building With Cross Bracing, Earthquake Handbook, FEMA Hazard Mitigation Handbook Series, Federal Emergency Management Agency, 2002.
  2. ^ TUOMI, ROGER L.; GROMALA, DAVID S. (1977). RACKING STRENGTH OF WALLS: LET-IN CORNER BRACING, SHEET MATERIALS, AND EFFECT OF LOADING RATE (PDF) (Report). USDA FOREST SERVICE RESEARCH PAPER.
  3. ^ Jackson, Bob (19 December 2014). "How to Install Deck Post Knee Braces". HandymanHowto.com.