drainage

I'm using the dmrb to do manual drainage calculations including gully spacings (cd526) and I'm stuck fairly early on with determining grating type. How do I determine the grating type (appendix A) using equation A1. For a D400 600x600 open lid grating? I've looked through BS EN 124 and I'm still...

There is a building which has no space left either in front or rear and it has space in the two sides of building wall and one can do 4 cement ring wells along the wall but what if it cause any damage to the wall and you can find more info about the problem in the below post...