Graphical Construction Glossary >> Woodwork. >> Joints >> Notched or Cogged Joints

Notched Or Cogged Joints
Heavy carpentry floor and roof framing joints.

notched and cogged heavy timber joints

Any and all of the joints above have been used for heavy timber floor framing. They are typical connections for floor joist or trimmers to timber beams. The cogs and the cut outs make a positive connection and reduce movement.

Similarly these joints have been used in many large roofs. Typically fixing heavy purlins to principal rafters in timber truss construction.

They are of course rarely seen these days as steel is used in most load bearing applications.

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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  It could be out of date!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!
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