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A trench box in use with chains still attached and a ladder in place. Trench shields (also called trench boxes or trench sheets) are steel or aluminum structures used to avoid cave-ins and protect utility workers while performing their duties within a trench. They are customarily constructed with sidewalls of varying thicknesses held apart by ...
Trench shoring is the process of bracing the walls of a trench to prevent collapse and cave-ins. The phrase can also be used as a noun to refer to the materials used in the process. The phrase can also be used as a noun to refer to the materials used in the process.
A diagram of a traditional French drain. A French drain [1] (also known by other names including trench drain, blind drain, [1] rubble drain, [1] and rock drain [1]) is a trench filled with gravel or rock, or both, with or without a perforated pipe that redirects surface water and groundwater away from an area.
A certain vertical distance is required between the effluent level in the disposal trench and the water level applicable when the effluent leaves the drain field for gravitational force to overcome viscous frictional forces resisting flow through porous soil. Effluent levels near the drain field will rise toward the ground surface to preserve ...
A trench drain (also known as a channel drain, line drain, slot drain, linear drain, or strip drain) is a specific type of floor drain featuring a trough- or channel-shaped body. It is designed for the rapid evacuation of surface water or for the containment of utility lines or chemical spills.
One may also be referred to as a services tunnel, services trench, services vault, or cable vault. Smaller cable containment is often referred to as a cable duct or underground conduit . Direct-buried cable is a major alternative to ducts or tunnels.
Invert level affects flow from drainage pipes. In civil engineering, the invert level is the base interior level of a pipe, trench or tunnel; it can be considered the "floor" level. [1]
Drainage Grate Municipal Casting. Municipal castings refers to many products, including: access hatches; ballast screens; benches (iron or steel); bollards; cast bases; cast iron hinged hatches, square and rectangular; cast iron riser rings; catch basin inlet; cleanout/monument boxes; construction covers and frames; curb and corner guards; curb openings; detectable warning plates; downspout ...