Trench drain
Channel: all the knowledge of the universe PRINCIPIA
Date: 2022-01-07

Trench drain, by Wikipedia https://en.wikipedia.org/wiki?curid=10024202 / CC BY SA 3.0

#Water_streams
#Sewerage_infrastructure
#Drainage
A trench drain （also channel drain, line drain, slot drain, linear drain or strip drain） is a specific type of floor drain containing a dominant trough- or channel-shaped body.
It is used for the rapid evacuation of surface water or for the containment of utility lines or chemical spills.
Employing a solid cover or grating that is flush with the adjoining surface, this drain is commonly made of concrete in-situ and may utilize polymer- or metal-based liners or a channel former to aid in channel crafting and slope formation.
Characterized by its long length and narrow width, the cross-section of the drain is a function of the maximum flow volume anticipated from the surrounding surface.
Channels can range from 1 inch （25 mm） to 2 feet in width, with depths that can reach 4 feet （120 cm）.
Trench drains are commonly confused with French drains, which consist of a perforated pipe that is buried in a gravel bed, and which are used to evacuate ground water.
A slot drain, also wrongly associated with a trench drain, consists of a drainage pipe with a thin neck （or slot） that opens at the ground surface with sufficient opening to drain storm water.
There are four common types of trench drains which are based on forming or installation method.
These are cast-in-place, pre-cast concrete, liner systems and former systems.
Newer stainless steel drains are available for residential and commercial shower installs and more commonly called "channel drains".
A linear drain A Channel Drain This is the original standard for trench drain systems.
Here, a concrete trench is formed in the ground using wood forms, reinforcing bar and manual labor.
It involves several steps: Building a wooden mold that will ultimately form the channel for the trench drain; Attaching a set of metal frames to the top edge of the form （which will hold the trench grating）; S...