Cutting heavy timber on site starts with a beam saw for the long cuts. A beam saw cuts heavy timbers to length [1], so it is the first tool to reach for when a beam is too long to move to a bench. The rest of your kit depends on the joints you plan to make. To go further, see Blade Coatings and Teeth for Aluminum Cutting: What to Look For.
Joinery needs a mortiser and a peg drill, plus classic hand tools such as framing chisels and slicks [1]. Mortising machines and peg drills cut the holes, while chisels and slicks clean up the fit.
Power tools and hand tools both have a place on a timber job [2]. Use power tools for the heavy, repetitive cuts, and hand tools where a precise fit matters. Chain mortisers and portable band saws are among the power tools made for timber work [2].
Which saw handles the long, heavy cuts?
Beam saws are the tool to reach for when you need to cut a heavy timber to length. For most long cuts on site, you choose between a beam saw and a portable saw that can be taken to the timber.
Beam saws for cutting to length
Beam saws are used to cut timbers to length [1]. Picture a post or beam that is a few inches too long for its bay. A beam saw lets you trim it square and to the exact mark, which matters when several timbers have to fit the same frame.
The saw is built for big stock, so use it for timbers that are hard to keep square by hand. Set the timber on the saw’s support, line up your mark, and make the cut in one pass. Keep your hands clear of the blade path and let the saw do the work.
If you cut several timbers to the same length, cut one first and use it as a template for the rest. Measuring each piece separately adds small errors that show up at the joints.
Portable band saws and portable sawmills
Portable band saws and portable sawmills are listed among timber tools [2]. They are the options when the timber is too big or too awkward to move to a shop saw. You bring the saw to the log or beam, which saves hauling heavy stock across a site.
A portable band saw suits cuts on a timber that is already in place, such as trimming a beam on a wall plate. A portable sawmill is more useful when you are converting a log into beams or boards. Plan extra setup time for either one, so save them for jobs that need them rather than a single trim cut.
Setting up the cut safely
Before you start, decide where the timber will rest and how it will be held. A heavy timber can shift or roll as the cut opens up, and the blade can bind or kick the stock out of line. Support both ends before the cut, so the piece stays level and cannot move while the blade is in it.
Once the timber is supported, mark the cut line on all four faces so you can check the blade against it from either side. Start the saw and let the blade reach full speed before it enters the wood. Support the offcut as well, because the piece you are cutting off can drop when it separates. It also helps to read Diamond Blade Options for Concrete Cutting at Home.
Stand to the side of the timber rather than directly behind the cut line, so a rolling piece cannot trap your legs. Keep bystanders out of the cut area until the offcut is supported. When the cut is finished, the new end should sit flat on your support and square to the length you measured. If it does not, the timber has moved during the cut, so reset it before you cut again.
What do you need for mortises and pegged joints?
For a pegged joint you need two kinds of power tool: one to cut the mortise, the rectangular pocket that receives the tenon, and one to bore the holes for the wooden pegs. Mortising machines and peg drills both belong to the classic timber framing kit [1].
Mortising machines and chain mortisers
Mortising machines are part of the classic timber framing tools [1]. A machine removes most of the waste wood from each pocket, so you are not chopping every mortise by hand. That matters most when a frame has many joints in large timbers.
Chain mortisers are sold for timber framing work [2]. They suit a job where you need many mortises of similar size, because you set up once and repeat the same cut. For a small project with only a few joints, a hand brace and chisel can still do the work, though it takes much longer.
The right machine depends on two things: how many joints you will cut and how large your timbers are. A few joints in small stock do not justify a large machine. A frame with dozens of joints in heavy timbers does. Pick the size that fits your timbers rather than the biggest model you can afford.
Peg drills
Peg drills bore the holes that wooden pegs fit into, and they are listed among the classic timber framing tools [1]. The peg is what locks a pegged joint together once the tenon sits in its mortise, so the hole has to line up with the joint.
Drill the peg holes after the mortise and tenon are cut and fitted dry. A dry fit lets you check that the holes will pass through both pieces in the right place before you glue or assemble anything. Mark the hole locations while the joint is still clamped together, so the marks stay aligned when you separate the pieces.
Work slowly with the drill. A peg hole that wanders off line can leave a tenon that will not seat fully, and the joint will be weaker for it.
Matching the tools to the joint
The mortising machine and peg drill do different jobs, so you need both for a pegged frame. The mortiser makes the pocket and the peg drill makes the hole that holds the joint shut. Think of them as a pair rather than alternatives.
If you are unsure which mortiser to buy, let the joint count decide. A short run of joints in small timbers points toward a hand method, while a long run of joints in heavy timbers points toward a powered machine. Either way, the peg drill is needed for the pegs.
Which hand tools still matter on a timber job?
Framing chisels and slicks are the hand tools that still matter most on a timber job. They remain classic timber framing tools [1]. You reach for them after the power work is done, when a joint needs its final fit.
Framing chisels
A framing chisel is a heavy chisel built to be struck with a mallet. You use it to square the corners of a mortise and clean out waste that a machine cannot reach. Keep the edge sharp, because a dull blade crushes wood fibers instead of slicing them.
Slicks
A slick is a long-handled tool with a wide, flat blade. You push it with your body weight to shave thin curls from a surface. It works well for paring a tenon shoulder or flattening a face that a saw left uneven.
Where hand tools fit in
Machines get timber close to size, but they rarely leave a joint ready to assemble. Cut faces can be slightly rough, and a tenon may be a little too tight. Hand tools clean up those surfaces and fit the joints that machines leave rough.
A tenon that is a touch too thick will not go together with a tap of the mallet. A few careful strokes with a slick usually let it slide home without splitting the wood. That matters when a frame has dozens of joints that all have to line up.
Power for the rough work, hand tools for the finish
The easiest way to split the work is by stage. Use power tools to cut timbers to length and rough out the mortises. Then switch to framing chisels and slicks to bring each joint to its final size.
Picture a mortise cut by a machine. Its walls may be straight, but the bottom is uneven, so you pare it flat with a chisel. Then the tenon drops in with a firm push instead of a hammer blow.
For example, if a power cut leaves a tenon slightly oversized, a slick can take off the extra in a few strokes. That is far more controlled than a second pass on a machine. Take light passes and test the fit after each one, because you can always remove more wood but you cannot put it back.
When the joint slides together with light hand pressure, the finishing work is done.
Where should a first-time timber builder start?
Start with a beam saw if your job has long timbers. Beam saws are used to cut the timbers to length [1], so this is the tool that opens most timber projects. Buy or rent one before anything else.
Add mortising and peg tools once your joint layout is set. The layout shows which mortises and peg holes you need, so you avoid buying them too early. Mortising machines and peg drills both appear among classic timber framing tools [1].
Add hand tools last, for fitting and finishing. Framing chisels and slicks are classic timber framing tools [1], and they handle the final fit at each joint.
The one thing to remember is the order: cut to length, cut the joints, then fit by hand. Your next step is to list every timber in your project with its length, so you know whether a beam saw comes first.