A drainage channel adapted to receive fluid from a building floor and drain it to a waste outlet , said channel comprising: (a) an upwardly open channel having a lower most floor portion and about the floor portion are sides to fluidly enclose and define the upwardly open channel , on an upper most periphery of the upwardly open channel a first one of the sides has a substantially planar flange extending outwardly therefrom, and on the upper most periphery a second one of the sides has a substantially planar flange extending outwardly or upwardly therefrom, and (b) a waste aperture in the floor portion to allow draining of the fluid from the upwardly open channel to the waste outlet when fluidly connected thereto, (c) a grate supported from the floor portion via upstands unitary with, and extending from, a lower portion of the grate , the upstands being adjustable in height to have an upper surface of the grate adapted to be substantially at a desired height relative to an upper surface of a finishing of the building floor , (d) penetrative fastenings , wherein the upwardly open channel is adapted to be substantially located within an aperture in the building floor and the one or both substantially planar flange(s) extending outwardly is/are adapted to be secured to an upper presenting surface of the floor , and, if present, the substantially planar flange extending upwardly is secured to an upward surface of one of at least one channel surrounding walls, to hold the drainage channel in place, wherein the planar flanges are adapted to be secured to the building floor and walls using said penetrative fastenings through the planar flanges and into the floor and walls, wherein the drainage channel requires, in use, no support from below, it is only secured in place by the planar flanges , such that the drainage channel is adapted to be located in the building floor for removal of fluid therefrom. (a) an upwardly open channel having a lower most floor portion and about the floor portion are sides to fluidly enclose and define the upwardly open channel , on an upper most periphery of the upwardly open channel a first one of the sides has a substantially planar flange extending outwardly therefrom, and on the upper most periphery a second one of the sides has a substantially planar flange extending outwardly or upwardly therefrom, and (b) a waste aperture in the floor portion to allow draining of the fluid from the upwardly open channel to the waste outlet when fluidly connected thereto, (c) a grate supported from the floor portion via upstands unitary with, and extending from, a lower portion of the grate , the upstands being adjustable in height to have an upper surface of the grate adapted to be substantially at a desired height relative to an upper surface of a finishing of the building floor , (d) penetrative fastenings , wherein the upwardly open channel is adapted to be substantially located within an aperture in the building floor and the one or both substantially planar flange(s) extending outwardly is/are adapted to be secured to an upper presenting surface of the floor , and, if present, the substantially planar flange extending upwardly is secured to an upward surface of one of at least one channel surrounding walls, to hold the drainage channel in place, wherein the planar flanges are adapted to be secured to the building floor and walls using said penetrative fastenings through the planar flanges and into the floor and walls, wherein the drainage channel requires, in use, no support from below, it is only secured in place by the planar flanges , such that the drainage channel is adapted to be located in the building floor for removal of fluid therefrom. <EOS>