Bracketing technical

Last updated on Thu, 02/10/2011 - 17:50

Pipe support except for the EPAMS system.

For cast iron, the bracketing system is designed to carry only the weight of the pipe and its content, which makes the specifiers’ design work easier.

Pipe weight in kg per metre

  40 50 75 100 125 150 200 250 300 400 500 600
Empty pipe 3 4 6 8 11 14 22 32 42 60 82 107
Full pipe 4 6 11 16 24 31 54 82 113 185 278 390 

The technical specifications for threaded rods and metal brackets shall be established on this basis.

Bracketing recommendations for cast iron pipe system elements

Consult local requirements for compliance. 

    Number of brackets
Vertical run Pipes 1 (2)*
Fittings** 1
Horizontal run Pipe length>2m 2
Pipe length<2m 1
Fittings **

* For SMU pipes L>2,7m installed outdoor
** When the shape of the fitting permits

It is also recommended to use one bracket per length or fitting (when the shape allows it, i.e branches…)

Support for horizontal pipework

The general recommendation for horizontal pipework is two load bearing brackets per pipe. For an indication, they should be installed at 0.75 m from each spigot so that, ideally, the distance between two brackets should be 1.5m.
Installation shall respect a slight fall of around 1 or 2%, and 0.5% at a minimum. (0.5 cm per metre).

Support for vertical pipework

For vertical waste or rainwater stacks, the brackets aim at preventing the pipework to fall over. It is recommended that one bracket should be fitted for each floor level.
Ideally the bracket should be installed on the first third from the upper spigot, and even closer to a socket joint.


Bottom of stacks

At the bottom of the stacks, the efforts from the pipes weight and possible end thrust forces will be addressed through stack support pipes.

Bracketing installations, openings and sealings are prohibited in prestressed girders.