Graphical Construction Glossary >> Woodwork. >> Joints >> Birdsmouth Joint
Best known in roofing as the joint between rafter and wall plates the humble birdsmouth joint is used a lot for permanent propping of under purlins in roofs and for temporary propping in formwork and shoring work.
The sketch above shows the centre lines of the two members lining up, and this works in most cases. It is a good rule of thumb that makes sure that the small lip is never so small that it can split off under load and let the prop slide. Usually fixed with nails in temporary work.
If you didn't find exactly what you are looking for try this search tool that will search the site and the web.
"What can be added to the happiness of a man who is in health, out of debt, and has a clear conscience?
"When we build, let us think that we build for ever."John Ruskin 1819-1900
Furniture Fittings - Architectural Hardware - Electronic Locking Systems - Technical Hardware
Roof Glossary and Roofing
Formwork Glossary and other tempory work.
Hand Tools Glossary
Power Tools Glossary
Calculator Pages.Concrete yardage calculator
Reader's Questions.Questions and answers.
Please Note! The information on this site is offered as a guide only! When we are talking about areas where building regulations or safety regulations could exist,the information here could be wrong for your area. It could be out of date! Regulations breed faster than rabbits!
You must check your own local conditions.
Copyright © Bill Bradley 2007-2012. All rights reserved.