Before embarking on any project you will have to decide on the type of woodworking joint you will be using.
There are seven primary woodworking joints…..Butt, Dado & Rabbet, Tongue & Groove, Dovetail, Finger, Mortise & Tenon and Lap. As you look at each joint you will soon see which one is bested suited to your job.
Butt
Butt
Butt joints are formed very easily, although they are not as strong, or as aesthetically pleasing. as other joints.
As the name implies, a butt joint is formed when the surfaces of two pieces of wood are butted together.
Fortunately modern woodworking glues are incredibly strong, so the joint would only fail through being twisted or sheared, rather than being pulled apart.
You can reinforce the joint with screws, nails, dowels and splines, so that it is capable of carrying a heavy load.
Boards are often butted together lengthwise to make tabletops, cutting boards and workbenches. These butt joints are very strong as they run in the same direction as the grain of the timber.
Butt with dowel reinforcement
Dowels are often used to reinforce and align butt joints in the construction of cabinets.
Dado & Rabbet
These are interlocking joints which are used for a wide variety of tasks. A rabbet is a square groove which is cut along the edge of the timber, whereas a dado is a square groove running across the grain.
Rabbet
Rabbet Joints are an improvement on butt joints as they partially interlock. They are exceptionally strong due to the greater surface area available to apply glue and the inherent strength of an interlocking joint. They are often used to conceal the edges and ends of panels especially in the construction of bookcases.
Dado
Dado Joints are used almost exclusively to support the ends of shelves in bookcases or dressers.
Dado and Rabbet
Dado and rabbet joints can be combined to form a joint which resists shear very effectively.
Tongue & Groove
Tongue and groove
Tongue and groove boards are often used to form the backs of cabinets and dressers, as the joints are strong as well as hiding the mechanics of the joint.
A groove is cut along one edge of the timber with a router and two grooves are cut in the opposite face to form the tongue.
Dovetail
Dovetail
Preparing a dovetail joint is probably the greatest challenge that a newbie woodworker is faced with. However, as with any skill, practice makes perfect.
Dovetail joints have two parts, the pin and the tail. Preparation is key….. make a drawing of the joint, ensuring that there is half a pin top and bottom.
The slope of the pin should be 1 to 6. The tails can be as much as three times their width apart.
Finger
Finger
Finger joints, also known as box joints, are mostly used to join pieces of equal thickness together.
Although not as strong as dovetails, they are easier to fit together, especially if you make the straight pins using a table saw with a dado blade set.
It’s wise to cut some test slots in scrap timber to ensure the fingers fit together snugly.
Mortise & Tenon
Mortise and Tenon
The great strength of a mortise and tenon joint is derived from the tenon being an integral part of the completed workpiece.
It’s also a very versatile joint, as you can make the tenon any size you want and even reinforce it if necessary.
However, there are two rules to follow when deciding on the width of the mortise.Firstly, it should be no more than half the thickness of the workpiece and secondly, leave a minimum of 3/8″ between the edge of the mortise and the face of the workpiece.
The best modus operandi is to prepare the mortise first using a drill and then complete the job by neatening the hole with a chisel. The joint can be reinforced using wedges or dowels..
Lap
Lap joints are favoured for frame construction as they have a large gluing area compared to butt joints and the two pieces lock mechanically giving additional strength.
There are three main types of lap joint…..corner half lap, ‘T’ half lap and cross lap.
Corner half lap
Corner half lapsare made by cutting two wide rabbets in the ends of two workpieces.
‘T’ Half Lap
A ‘T’ half lapjoins the end of one board having a wide rabbet to the middle of another board which has been cut with a matching wide dado.
Cross lap
Cross laps are half lap joints where both workpieces are cut with dados and the joint is within the length of the workpiece.
Request our monthly newsletter and occasional emails
I have always loved wood crafts. In my teens it was model gliders, ships in bottles, puppets, wooden toys.... Then I had to earn a crust and became a civil engineer designing and building bridges, motorways, schools...until I became a video producer. On retiring I started making dolls houses but now I am a blogger concentrating on my love of wood.
We use cookies on our website to give you the most relevant experience by remembering your preferences and repeat visits. By clicking “Accept”, you consent to the use of ALL the cookies.
This website uses cookies to improve your experience while you navigate through the website. Out of these, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities of the website. We also use third-party cookies that help us analyze and understand how you use this website. These cookies will be stored in your browser only with your consent. You also have the option to opt-out of these cookies. But opting out of some of these cookies may affect your browsing experience.
Necessary cookies are absolutely essential for the website to function properly. These cookies ensure basic functionalities and security features of the website, anonymously.
Cookie
Duration
Description
cookielawinfo-checkbox-analytics
11 months
This cookie is set by GDPR Cookie Consent plugin. The cookie is used to store the user consent for the cookies in the category "Analytics".
cookielawinfo-checkbox-functional
11 months
The cookie is set by GDPR cookie consent to record the user consent for the cookies in the category "Functional".
cookielawinfo-checkbox-necessary
11 months
This cookie is set by GDPR Cookie Consent plugin. The cookies is used to store the user consent for the cookies in the category "Necessary".
cookielawinfo-checkbox-others
11 months
This cookie is set by GDPR Cookie Consent plugin. The cookie is used to store the user consent for the cookies in the category "Other.
cookielawinfo-checkbox-performance
11 months
This cookie is set by GDPR Cookie Consent plugin. The cookie is used to store the user consent for the cookies in the category "Performance".
viewed_cookie_policy
11 months
The cookie is set by the GDPR Cookie Consent plugin and is used to store whether or not user has consented to the use of cookies. It does not store any personal data.
Functional cookies help to perform certain functionalities like sharing the content of the website on social media platforms, collect feedbacks, and other third-party features.
Performance cookies are used to understand and analyze the key performance indexes of the website which helps in delivering a better user experience for the visitors.
Analytical cookies are used to understand how visitors interact with the website. These cookies help provide information on metrics the number of visitors, bounce rate, traffic source, etc.
Advertisement cookies are used to provide visitors with relevant ads and marketing campaigns. These cookies track visitors across websites and collect information to provide customized ads.