Tie Beam

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tie beam

In roof framing, a horizontal timber connecting two opposite rafters at their lower ends to prevent them from spreading. See also: Beam
Illustrated Dictionary of Architecture Copyright © 2012, 2002, 1998 by The McGraw-Hill Companies, Inc. All rights reserved
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Tie Beam

 

(in construction), a bar or rod, usually horizontal, that is under tension and connects the end joints of a building structure, which are subject to horizontal thrust forces. By tightening the ends of the structures, the tie beam absorbs the thrust, relieving the supports of the horizontal force. Tie beams may be made of metal or reinforced concrete (less frequently, wood); they are used in arches (arch trusses), vaults, bridge structures, and building roofs when a thrust-bearing support system is not suitable for economic or other reasons.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.

tie beam

1. On individual pile caps or spread footings which are eccentrically loaded, a beam (usually of reinforced concrete) used to distribute horizontal forces to other pile caps or footings; a strap, 2.
2. In roof framing, a horizontal timber connecting two opposite rafters at their lower ends to prevent them from spreading; also see collar beam.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.
References in periodicals archive ?
Comparing with the process to calculate these two indexes, more detailed information of masonry buildings are required for index [I.sub.sd], including mainly the detailed information of tie columns, tie beams, and floor slab.
(2) [[gamma].sub.hi] is the enhancement ratio of RC tie beam to masonry wall:
The analysis indicated that the application of anchored tie beams caused the roof to initially move towards the working while later it was subject to compression.
Test results indicate that load capacity of mortise end-walls in tie beams is related both to the wood strength perpendicular to the grain and to the wood shear strength parallel to the grain.
by 12 in.) adjacent to the tie beams and knee braces.
Also of interest was the effect of intermediate tie beams on deflections along with the effect of reinforcement of the wall plates with 3.5-inch-square beams (clamped at the ends and center to the inside faces of the wall plates) on ridge and wall plate deflections.
Fascinating architectural features are everywhere - some magnificent oak timber framing, a plaster relief ceiling in the Queen Anne dining room and the wonderful 14th century great hall, mentioned by Pevsner for "its splendid original open roof incorporating cambered tie beams and king posts with foiled four way struts making pointed trefoil shapes with the foiled principals".
Four tie beams span the room's width, connecting the beefed-up exterior wall to interior bearing walls.
Likewise, the sills are linked together at the mid-length points by the tenons of the wall studs supporting the tie beam. If the sills are not fastened to a secure foundation, the floor joist tenons that frame into the sills on either side of the intermediate sill joint are pinned to the sills in order to provide resistance to lateral loading.