Tie (engineering)

Tie (engineering)
A hurricane tie used to fasten a rafter to a stud

A tie, structural tie, connector, or structural connector is a structural component designed to resist tension.[1] It is the opposite of a strut, which is designed to resist compression. Ties are generally made of galvanized steel[2] Most ties have holes allowing them to be fastened to wood by nails. There are certain nails for certain ties.[citation needed] Screws, which usually have a lower shear strength than nails, are generally avoided.[3] Among the most common of these is the hurricane tie or seismic tie used in the framing of wooden structures.

Contents

Types

Hanger

A joist hanger

A hanger has a seat that a board, specifically a joist or girder, rests on. Hangers are most commonly used in floors, decks, and porches. If hangers are used the 'bowing' down[jargon] of floor joists and girders is less likely to occur. They also give added strength to the connection.

Hurricane tie

A hurricane tie is used to help make a structure (specifically wooden structures) more resistant to high winds, resisting uplift, racking, overturning, and sliding.[4] Each of the crucial connections in a structure, that would otherwise fail under the pressures of high winds, have a corresponding type of tie, generally made of galvanized or stainless steel, and intended to resist hurricane-force and other strong winds.

See also

Notes

  1. ^ Trautwine, John Cresson (1919) [1871] (Google books). The Civil Engineer's Pocket-Book (20th ed.). Wallingford, Pennsylvania: Trautwine Company. p. 359. http://books.google.com/books?id=iKgNAAAAYAAJ. Retrieved February 12, 2010. "A long slender piece sustaining tension is called a tie. One sustaining tension is called a strut or post." 
  2. ^ "Different coatings available". strong-tie.com. http://www.strong-tie.com/productuse/coatings.html. 
  3. ^ "FAQ. Can I use nails other than what is specified? Can screws be used?". strong-tie.com. http://www.strong-tie.com/productuse/faq-general.html#tech. 
  4. ^ "How wind affects your home". safestronghome.com. http://www.safestronghome.com/highwind/01.asp.  (A Simpson Strong-Tie website)



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