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Lifting inserts: used for lifting operations of plain or prestressed RC beams. The insert can be a threaded rod. See also bolt (climbing). Anchor channels: used in precast concrete connections. [8] The channel can be a hot-rolled or a cold-formed steel shape in which a T-shape screw is placed in order to transfer the load to the base material.
The anchor selection, together with additional reinforcement, and rigging arrangements is influenced by: - The dead weight of the element - The number of anchors in the element and the configuration of the anchor - Capacity of the anchor at the specific concrete compressive strengths at time of lift - The dynamic loads applied during lifting ...
The channels are supplied with foam filler to prevent concrete from leaking into the channel when the concrete is poured. The system includes T-shaped bolts which are called T-bolts or channel bolts in the regulations. They are also called hammer head bolts, serrated bolts or hook-headed bolts based on their shape and function.
A component that securely connects separate segments of post tensioning ducting, commonly used when joining precast concrete segments in a prestressed structure. dummy strand A short length of prestressing strand pre-installed into ducting during concreting to maintain duct integrity. Occasionally used at some jointing arrangements.
A hold-down may also refer to clamping device used to anchor a pipe to a structural steel element or concrete floor or allow movement of the pipe in an axial direction. [1] At the bottom, the hold down is connected to the concrete foundation or structural slab by an embedded or epoxied anchor bolt. At the top, the hold down is connected to a ...
TIME-SERT insert. A threaded insert, also known as a threaded bushing, is a fastener element that is inserted into an object to add a threaded hole. [1] They may be used to repair a stripped threaded hole, provide a durable threaded hole in a soft material, place a thread on a material too thin to accept it, mold or cast threads into a work piece thereby eliminating a machining operation, or ...