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For example, 8-inch (200 mm) loft blocks are typically used with 0.25-inch (6.4 mm) GAC, but 12-inch (300 mm) blocks may be used to facilitate flying heavier line sets (e.g., electrics). Loft blocks may be equipped with idler pulleys or sag bars to limit the sag of horizontally running lift lines on under-hung systems.
Historically 1.5 inch hose was the primary initial attack line but has been supplanted in most of the US by 1.75-inch-diameter (44 mm) hose that carries 175 gallons per minute. Two-inch hose is available as an option. Attic ladder
These pipe clamps are similar to hose clamps, but are heavier-duty and ideally are made completely of stainless steel (including the screw) to provide maximum service life. [ 22 ] : 149 [ 19 ] : 71 Optionally, the entire rubber sleeve may be jacketed with thin sheet metal, to provide extra stiffness, durability, and resistance to accidental ...
A chuck is a specialized type of clamp used to hold an object with radial symmetry, especially a cylinder. In a drill, a mill and a transmission, a chuck holds the rotating tool; in a lathe, it holds the rotating workpiece. [1] Chucks commonly use jaws to hold the tool or workpiece.
Screw clamps are normally used for hoses 1/2 inch diameter and up, with other clamps used for smaller hoses. The first patent for a worm-drive hose clamp was granted to Swedish inventor Knut Edwin Bergström [ se ] in 1896 [ 1 ] Bergström founded “Allmänna Brandredskapsaffären E. Bergström & Co.” in 1896 (ABA) to manufacture these worm ...
In 2005, Bridges to Prosperity received a long term donation of free 7/8 inch to 1.25 inch wire rope from the ports of Portsmouth and Norfolk, Virginia. [9] The wire rope donated was American manufactured high tensile steel wire rope used on gantry cranes for unloading container ships. Later, the port of Baltimore was added, as were Texas and ...
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