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Shoring is commonly used when installing the foundation of a building. A shoring system such as piles and lagging or shotcrete will support the surrounding loads until the underground levels of the building are constructed. Commonly used shoring equipment includes post shores, shoring beams, and timber jacks.
Cribbing is usually accomplished with blocks of wood, often 4×4 (3 + 1 ⁄ 2 in or 89 mm) or 6×6 (5 + 1 ⁄ 2 in or 140 mm) and 18–24 in (460–610 mm) long.Soft woods, like spruce and pine, are often preferred because they crack slowly and make loud noises before completely failing, whereas stiffer woods may fail explosively and without warning.
Hydraulic shoring is the use of hydraulic pistons that can be pumped outward until they press up against the trench walls. This is typically combined with steel plate or a special heavy plywood called Finform. Another method is called beam and plate, in which steel I-beams are driven into the ground and steel plates are slid in amongst them. A ...
Jack posts are mostly used for shoring: temporary supports during building repair or alteration work, rather than scaffolding: access platforms for workers. A typical use is to support an existing horizontal beam while its original masonry supports are removed or repaired.
An axlebox, also known as a journal box in North America, is the mechanical subassembly on each end of the axles under a railway wagon, coach or locomotive; it contains bearings and thus transfers the wagon, coach or locomotive weight to the wheels and rails; the bearing design is typically oil-bathed plain bearings on older rolling stock, or roller bearings on newer rolling stock.
“Since the beam shoring has been installed, the structural condition of the subject beams are such that the building can be reoccupied,” Calderone wrote Friday in a letter to Miami Beach ...
The pile driving machine positioned over the pile with an excavator or crane, and is fastened to the pile by a clamp and/or bolts. Vibratory hammers can drive or extract a pile. Extraction is commonly used to recover steel I-beams used in temporary foundation shoring.
Toby Fischer lets his 20-year-old truck warm up in the dark. Frost has stuck to the windows — “like concrete,” he says. The ice melts slowly, revealing cracks that span the length of the windshield. He shifts into reverse, and the truck skids over a slick patch before the tires grip the road again.
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