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Metal connector plates are manufactured with varying length, width and thickness (or gauge) and are designed to laterally transmit loads in wood. They are also known as stud ties, metal connector plates, mending plates, or nail plates. However, not all types of nail plates are approved for use in trusses and other structurally critical ...
Gusset plates are used to connect beams and columns together or to connect truss members. They can be either the only way of connecting the beam and columns or they can be used with bolts and welds. Gusset plates are therefore used in most metal weight-bearing structures, but the material and size of the gusset plate varies based on the structure.
Metal plates and correct, period material can be used to repair, although 100% recovery of the material may be hard if the wood truss has deteriorated. MPC (Metal Plate Connected) wood trusses are typically made from dressed wood (lumber), rather than timber (round-wood poles). [23]
The method for calculating the size of a flitch beam to be used in construction is straightforward, using the transformed-section method. The steel plate is treated as an equally stiff piece of wood, with its width modified by the ratio of their moduli of elasticity. This allows the deflection of the entire beam to be calculated as if it were ...
A variation of a plank framed truss with metal plate connectors on a pole barn. Plank framed truss was the name for roof trusses made with planks rather than timber roof trusses. In the 20th century, it was typical for carpenters to make their own trusses by nailing planks together with wood plates at the joints.
A truss can be thought of as a beam where the web consists of a series of separate members instead of a continuous plate. In the truss, the lower horizontal member (the bottom chord) and the upper horizontal member (the top chord) carry tension and compression, fulfilling the same function as the flanges of an I-beam.
It has been supplanted in modern construction with welded or bolted plate girders, which use more material but have lower fabrication and maintenance costs. The term is also sometimes used to refer to a laced strut [ 2 ] or laced tie , structural members commonly made using a combination of structural sections connected with diagonal lacing.
Crown strut: A piece similar to a crown post but not carrying a plate. [27] Ashlar – or ashlar piece: Short post from a tie beam to a rafter near a masonry wall. [28] Purlin – A post supporting a purlin plate, may be plumb or leaning (canted). Hammer – An upright in a hammer beam truss supported on the hammer beam in a hammerbeam roof. [29]
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