tie beam

In roof framing, a horizontal timber connecting two opposite rafters at their lower ends to prevent them from spreading. See also: Beam

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.

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 It might be outdated or ideologically biased.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.

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References in periodicals archive

The end of each tie beam was reinforced with either one or two cross bolts (Fig.

Exploratory study of truss heel joints constructed with round mortise and tenon joints

The load-carrying capacities of these connections are unknown, but they are expected to be limited by their location near the end of the tie beam. Related work with through bolt and dowel nut joints (Eckelman 2004) indicates that joint capacity can be increased either by locating the mortise farther from the end of the beam or by reinforcing the end-wall of the mortise with a cross bolt.

Parallel-to-grain end-load capacity of round mortises in round and rectangular timbers

For this bridge, with its box section tension tie beam fabricated from two flange and two web plates, the web and flange plates are connected by structural angles in each interior corner of the box through rows of stitch bolts.

Twin Bridge Replacement

The axial force acting on the ends of the tie beam amounted to 806 pounds.

Performance tests of small barn frame constructed with round mortise and tenon joints

The front and back top plates along with the tie beam provide resistance to lateral forces applied to the walls by the side rafter plates and also locate the position of the tops of the corner posts spatially in a side-to-side direction.

Demonstration building constructed with round mortise and tenon joints and salvage material from small-diameter tree stems. (Wood Engineering)

Columns, footing tie beams, backfilling and concrete slabs were constructed for nine buildings, while only columns and footing tie beams could be seen for the other three buildings,' the COA said in the report.

COA questions P414 million housing project on hazardous land