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Precast concrete is employed in both interior and exterior applications, from highway, bridge, and high-rise projects to parking structures, K-12 schools, warehouses, mixed-use, and industrial building construction. By producing precast concrete in a controlled environment (typically referred to as a precast plant), the precast concrete is ...
Manhole closings are protected by a grating or manhole cover, a flat plug designed to prevent accidental or unauthorized access to the manhole. These covers are traditionally made of metal, [ 2 ] but may be constructed from precast concrete , glass reinforced plastic or other composite materials (especially where cover theft is of concern).
A manhole cover designed by artist Antony Gormley was stolen in 2013, ten years after its installation. [23] In the city of Kolkata, India more than 10,000 manhole covers were taken in two months in 2004. These were replaced with concrete covers, but these were also stolen, this time for the rebar inside them. [24]
Sanitary manhole. A sanitary manhole (sewer manhole, [ 1 ]sanitary sewer manhole[ 2 ] or sewer maintenance hole[ 3 ]) is a manhole that is used as an access point for maintenance and inspection of an underground sanitary sewer system. Sanitary manholes are sometimes used as vents to prevent the buildup of pressurized sewage gas. [ 4 ]
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 ...
Cast-in-place concrete. Animation depicting construction of multi-story building using aluminum handset formwork. Cast-in-place concrete or Cast-in-situ concrete is a technology of construction of buildings where walls and slabs of the buildings are cast at the site in formwork. [1] This differs from precast concrete technology where slabs are ...