Wood Flooring Spline (Slip Tongue) 1

Miters make quick and easy box joints, but they have no mechanical strength. NOTE: If there are any straight-aways clamp something stiff and straight to them to keep the splines from curving while the glue sets up. The straight edge should be used until at least 3 splines are laminated and the glue has set. If you need to add a turnout, start glueing new splines to the side of the existing roadbed. Cut the Jig Base Components: Using a simple tablesaw sled for cutting 45-degree miters, cut a small piece of 3/4-in.

Splines can be a useful, hidden aid in complicated joinery, or have a decorative effect when highlighted with a contrasting wood and left exposed in the end grain of a workpiece. They can also be added inside the full length of a miter joint, to align and strengthen it. Splines assist in leveling the planks under the breadboard ends of a tabletop, in lining up compound angles and in strengthening mitered frames. If you cut in the center you can weaken the miter joint by making the tip too thin. My desire is to learn how to make boxes…and one of the simple ways is to use splines.

All boards installed in a solid hardwood flooring job should be end matched and side matched. So, most times, I base my choice of corner joint on appearance rather than strength. Splined miters add interest to the corners, especially when the splines are made from a wood that contrasts with the box sides. If its arranged right you don’t need any splines (which ideally would be made from the flooring material).


I can’t cover decades of box-making knowledge in a single article, but I can share some of the things I consider when designing a box—wood, corner joints, lid, bottom, feet, pulls, and dividers. I have a drum sander that makes short work of this, but you can also cut the slot to fit the wood you have on hand – use a dado blade with shims as needed to get it just right. In an early Wood Works episode, David Marks made a hanging bookcase where the shelves were joined ONLY with biscuits to the side panels.

And because boxes come together more quickly than many other woodworking projects, I have more opportunities to try new designs and learn new wood working techniques. The option here takes a piece of trim already close enough to required slip-tongue width so that only a single table saw rip is required to produce oak splines that are a fraction of these available costs. Glue-Up: With your splines ready to go, now it’s just a matter of applying glue, inserting a spline, and clamping your project together.

In this regard, the department’s primary teaching responsibility is to provide high quality educational opportunities necessary to adequately prepare students for professional and scientific careers in forest products and wood science. Oh I see so best option is to either knock up some new splines useing something like ceder which compresses well. A less common use of splines is to close the gap between boards used to make the floor of flower or sand boxes. As the timber is deformed, it stores elastic potential energy as the wood tries to regain its original straightness.

All you’ll need is an angled piece of scrap, to act as a backup jig, and you can make spline miter joints in no time flat. Before super-strong modern adhesives and easy-to-use biscuits came along, woodworkers frequently used shop-made splines to reinforce some forms of joinery. I had some reservations about its durability but masonite splines have been in use on some model railroads for 15+ years with no signs of delamination.

The Large Box Spline Jig from Rockier Woodworking and Hardware allows the user to cut slots with a hand-held router and add a decorative spline. Unlimited design possibilities open up when you vary the texture and color of the wood or introduce contrasting materials such as stone, metal, or fiber. I was looking for a way to cut splines in my small boxes with my router and this fits the bill perfectly. The slpine should be 1/8 inch in that stock and splines can be cut from doorskin or 1/8 oak stock.