Presentation on theme: "Types of scaffolds samuel waithima 2012BC25460"— Presentation transcript:
1 Types of scaffolds samuel waithima 2012BC25460 SCAFFOLDINGTypes of scaffoldssamuel waithima2012BC25460
2 Definationscaffolding is a temporary structure made from wood or metal.It lets you work on part of a building that you can't reach from the ground.
3 Types of scaffold There are two types of sçaffolding the putlog scaffolding ,which is supported at one end by the buildlng under constructionthe independent scaffold, which has a horizontal working platform that rest on vertical poles at both ends.
4 parts of scaffoldstandard-verticle member that carry weight of scaffolding to the groundledger -horrizontal members that connect the standards.they are parell to buildingputlogs-cross members that have one end built into the wall of the buildingbraces member fixed diagonally to stiffen the scaffold.
5 Advantages of timber scaffold its less expensiveit is easy to cut and fittimber can be reusedtrees are readily available
6 Disadvantages it takes longer to erect timber may have hidden defects tinber putlog scaffold poles leaves holes in the walls, to be filled in.the pole joints are secured with strings and nails rather than stronger purpose made fittings
7 Advantages of metal scaffolding it is durableit is quick and simple to erectit is more adaptablethe poles are all same quality and strength
8 Disadvantages the initial cost is.higher than for timber the many joint fittings can easily be lost or stolenthe poles must be carefully stored and protected when not in use