WELCOME TO OUR Concrete raft foundations PROJECT
To promote your business on this page, click here to find out more!
Summary: Concrete raft foundations and how to make the decision to use a raft for your footing
Share and bookmark DIY Doctor
|
Raft Foundations:
Because of the speed and volume of houses required after the second world war, the raft foundation was widely used. The raft foundation was cheaper, easier to install and most importantly, did not require as much excavation as the usual strip foundations.
When the Building Regulations were introduced in 1965 there were no generic rules for raft foundations as there were for strip foundations. This meant that to use a raft foundation, it had to be designed and approved by Building Control. This made the entire operation much more difficult and time consuming so raft foundations became less widely used almost overnight.
Rafts are most often used these days when the strata is unstable or (because of this) a normal strip foundation would cover more than 50% of the ground area beneath the building. There are also situations (usually in areas where mining has occurred) where there may be areas of movement in the strata.
A raft foundation spreads the weight of the building over the whole ground floor area of that building. The raft is laid on a hardcore, or scalping bed and usually thickened at the edges, especially in very poor ground. Rafts are most suitable when the ground is of good load bearing capacity and little work is required to get a solid foundation.
Was this project useful?
Top Tools
Click on a tool below for additional information.
Much more construction information is available in our bookstore. All the tools and fittings you need in the toolstore.
Top Tools
Forums
| Are you a tradesman ? Get your very own webpage with ProblemSolved all for FREE - Click here |
||
|
|
||
Share and bookmark DIY Doctor
|
