Graphical Construction Glossary >> Woodwork. >> Joints >> Hammer Key Joint

Hammer Key Joint
An end joining technique where a hammer shaped tenon is set into a similar shaped recess. Often used in conjunction with wedges to pull the joint tight.

An hammer headed joint

loose key joint

The joints on this page have to a certain extent been replaced by metal bolt systems which when used with a system of jigs and templates are very quick to make and give positive tightening force. The generic term is handrail bolts, because they came to popularity in handrail use.

The hammer key system is nevertheless an excellent way to join pieces of timber end on.

If I was in the business of making fine furniture I would go out of my way to use (and show) as many of these traditional joints as possible.

  1. Above is the joint between a window or door jamb and it's curved head.
  2. If the timber used is hardwood, then this joint would be economical to use.
  3. If the timber to be used is softwood then it is suggested that a loose key be made out of hardwood similar to what is sketched alongside.
  4. The joints have to be carefully measured with allowance for the wedges and space at the ends of the keys for the joint to pull up tight with the wedges.
  5. Quite often these joints in wider timber also have short loose tongues or dowels inserted also to keep the joints flat and to stop twist.

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?
Adam Smith 1723-1790

"When we build, let us think that we build for ever."John Ruskin 1819-1900

coates hire
Hire Equipment
Furniture Fittings - Architectural Hardware - Electronic Locking Systems - Technical Hardware
BuilderBill sponsorship

BuilderBill Books

building maths
Building Maths

Stair Design
asbestos ebook
Asbestos Book

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  It could be out of date!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.
Page copy protected against web site content infringement by Copyscape