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[1] [2] It consisted of single-insulated copper conductors run within wall or ceiling cavities, passing through joist and stud drill-holes via protective porcelain insulating tubes, and supported along their length on nailed-down porcelain knob insulators.
In light-frame construction, a trimmer is a timber or metal beam (joist) used to create an opening around a stairwell, skylight, chimney, and the like. Trimmers are installed parallel to the primary floor or ceiling joists and support headers, which run perpendicular to the primary joists.
The term binding joist is sometimes used to describe beams at floor level running perpendicular to the ridge of a gable roof and joined to the intermediate posts. Joists which land on a binding joist are called bridging joists. [4] [5] A large beam in the ceiling of a room carrying joists is a summer beam. A ceiling joist may be installed flush ...
I-joists, I-beams engineered from wood with fiberboard or laminated veneer lumber, or both, are also becoming increasingly popular in construction, especially residential, as they are both lighter and less prone to warping than solid wooden joists. However, there has been some concern as to their rapid loss of strength in a fire if unprotected.
The CJ-Series Joists are capable of supporting larger floor or roof loadings due to the attachment of the concrete slab to the top chord of the composite joist. Shear connection between the concrete slab and steel joist is typically made by the welding of shear studs through the steel deck to the underlying CJ-Series Composite Steel Joist. [2]
The "ant capping", typically a 0.5mm to 0.8mm thick galvanised steel sheet, must be placed between the post and the bearer overlapping the perimeter of the post by approximately 20mm to 40mm or more. The cranked eye bolt is fastened to the post using a bolt through the eye, the crank in the shaft allowing the shaft to be positioned so that it ...
Eaves of a house in Northern Australia.The white underside would be referred to as a soffit. In this example the soffit is fixed to the slope of the rafters.The dark grey fascia boards form the outer edge and have a groove to receive the soffit lining sheets which cover the rafter tails.
Astronomical ceiling decoration in its earliest form can be traced to the tomb of Senenmut (Theban tomb no. 353), located at the site of Deir el-Bahri, discovered in Thebes, Upper Egypt. The tomb and the ceiling decorations date back to the XVIII Dynasty of ancient Egypt (circa 1479–1458 BCE). It is closed to the public. [2]