While joining a strut from a king post or bottom chord is a simple timber frame joint to cut it is important to look at the connection details. Here we use a 3/4″ housing, and because we are using white oak a 1 1/2″ tenon and two 1″ pegs to tie everything together.
A classic joint for a king post to rafter connection using a 1 1/2″diminished housing and because it is designed for oak a 1 1/2″ tenon. As always make sure you check with a qualified engineer before you begin cutting joinery on your frame.
While this fully housed joint does not have the dramatic affect that a diminished housing. It offers a simpler look that offers a more traditional look and feel. It is the style I chose for my home and have no regrets.
Every timber gets its name from where it is in the frame. This beam is between two posts. It holds them apart from the rafters pushing them in. It is called a “Straining Beam”. Here is an exploded view of one. Sometimes they have braces, sometimes they don’t. Usually it has a standard tenon on […]
Here is an exploded view of a pair of purlins where they meet the rafter. Each frame design should be reviewed by an experienced timber framing engineer for the exact design of this joint. Loads, spans, type off wood, and possibly other factors will have to be considered when designing this joint. My examples are […]
This is an exploded view of a tongue and blind mortise at the ridge. The rafters are again 4×6 at 12/12 pitch with a 1 1/2″ tenon and mortise with a 3/4″ peg. The mortise doesn’t go all the way through the rafter and it doesn’t go all the way to the top end. This […]
This joint is known as a “step lap rafter tail” and the joint in the plate is known as a step lap rafter seat. I believe it gets it name as the tail laps over the plate which creates an overhang to shed the rain water away from the side of the building. And that […]
This joint is known as the tongue and fork joint. Here is an exploded view of two 4×6 rafters at 12/12 pitch with 1 1/2″ tenon set 1 1/2″ off the reference side with a 3/4″ oak peg. These rough sawn rafters have also been reduced down to the next smaller 1/2″ in size at […]
Another scarf joint that I have used is the “bladed timber frame scarf joint”. This drawing is of a 6″ x 10″ bladed scarf joint that we cut to create one long timber for an addition to an existing barn. The scarf is 2′ long and the tenons are 2 1/2″ thick and 4″ long. […]
Sometimes in timber framing it is necessary to join two timbers end to end. This joint is called a scarf joint. One of the most popular scarf joints is the stop splayed table scarf with wedges and under squinted butts. My drawing program is made for to be used to drive a CNC machine to […]