 |
|
Pressure-locked gratings
|
|||||||||
L : length of grating in support direction
B : width of grating across the support direction Mc : centre distance between transverse bars Ma : centre distance between bearing bars H : height of bearing bar t : thickness of bearing bar D : diagonal dimension |
|
Description and definition of pressure-locked gratings
Pressure-locked gratings are pressed together under extreme force, resulting in a quicker assembly process. Also, all bar centres are based on an 11.11 mm increment in both directions. When describing pressure-locked gratings the total dimension and mesh size is given so that the span direction (bearing bars) is always stated as the first dimension (underlined), and the mesh width (the transverse bars) as the last dimension. The mesh size is described with the indication of the distance between the transverse bars as the first dimension, and the distance between the bearing bars as the last dimension. The mesh sizes are separated by a slash "/". Span x Width Mc/Ma Hxt mm Example: A grating that is 500 mm in the span direction and 1000 mm wide. The mesh size is to be 33 mm between the bearing bars and 11 mm between the transverse bars. The grating height is to be 20 mm, and the thickness of the bearing bars 2 mm: The grating is described like this: 500 x 1000 11/33 20x2 mm The grating height is determined by the loading of the grating (requirements of load and use of the grating). The bearing bars are dimensioned for the transfer of relevant loads, the transverse bars (filler bars and possibly support bars) are dimensioned for distribution of the loads to as many bearing bars as possible, and for absorbing horizontal loads, e.g. brake loads.
|
|||||||
|
Galv. mesh grating
 
MATERIALS
Pressure-locked gratings are vailable in the following materials: - Steel 240 YP (FE 360) - Stainless steel AISI 304 - Stainless steel AISI 316 - Aluminum |
Manufacture of pressure-locked gratings
Galvanised mesh gratings consist of bearing bars that lie in the span direction, and filler & support bars that lie across the bearing bars. The filler and support bars, the height of which is lower than that of the bearing bars, are pressed into specially shaped and punched grooves in the bearing bars under extreme pressure. This operation binds the different bars together in a mesh. As terminal edges and in order to stabilise it, the grating is provided with edging bars on all four sides. Where the edging bars meet in the grating corners, the edges are welded on the inside to further stabilise the grating. 
Size and weight Maximum manufactured size is 3000x1500mm, subject to weight and specification. Larger panels can be accommodated on special arrangement. |
|