Reinforcing & Gluing a Waterfall Miter Joint

gluing a waterfall

Domino (1), floating tenons (2) and dowels (three) are all good
decisions for reinforcing the joint.

When you end creating a pleasant miter joint, then comes the
time to consider making the joint stronger. As glue alone
is not going to suffice, including splines or keys in between the 2
banks of the miter can guarantee a long-lasting joint. You probably have
Festool Domino
that is going to be a cakewalk, however since
many people don’t have entry to 1 listed below are just a few different

  • Splines: Often made of plywood, splines may be put in into two
    matching grooves routed within the mitered banks. In the event you select
    to make use of hardwood for the spline be sure to align the
    splines’ grain perpendicular to the floor of the miter
    financial institution. Or, as an alternative of an extended spline, make two or extra
    particular person keys to be glued into corresponding mortises. By
    the way in which, the keys on this case ought to truly be known as
    “floating tenons.”
Plywood spline

Plywood spline

  • Biscuit joint: Usually talking,
    two rows of #20 biscuits will work effectively for small and low
    espresso tables, and so forth. However I’d not suggest utilizing them on
    massive and tall waterfall joints, in a setting that sees heavy
    flooring site visitors or the place the leg is at a threat of incidental
    trauma reminiscent of a blow or a kick.
  • Dowels: One other good selection as
    lengthy because the reciprocating holes are drilled precisely. There
    are two foremost methods to make sure alignment between the holes on
    the 2 banks:

    • A technique is to drill one financial institution. Insert
      dowel facilities into the holes, then marry the 2 banks by
      hinging them closed with the assistance of tensioned masking
      tape strips that pulls the joint collectively. Lastly, drill
      the second group of holes utilizing the impressions that the
      dowel facilities left.
    • In the event you don’t have dowel facilities round
      you are able to do the next: (A) hammer skinny brads or nails
      into the primary miter financial institution to 1/four” or so deep. (B) Now
      snip their heads pleased with the floor to permit for a
      1/16” or so protrusion. The brads must be reduce tall
      sufficient to offer for ample buy for his or her
      extraction later. (C) Marry the 2 banks as defined
      above, (D) extract the brads and drill the holes for the
      dowels by centering the bit within the mirrored brad
    • Notice: Everytime you drill mirroring dowel
      holes freehand, you run the danger of a number of holes
      changing into misaligned (with a doweling jig it’s much less
      more likely to occur). The treatment for that is to enlarge one
      of the mirroring holes and use a thick hole filling glue
      (I choose epoxy) to compensate for the hole. As half the
      dowel is anchored tight in one of many miter banks, the
      remaining size has some wiggle room to adapt to the
      enlarged gap on the opposite financial institution. This offers you some room
      for sufficient adjustment of the waterfall nook.
Co-centering dowel holes prior to drilling them using snipped brads.

Co-centering dowel holes previous to drilling them utilizing snipped

  • Keys routed within the path of the
    . That is most likely the strongest miter joint I can
    consider. I used this method once I constructed a current tall
    piece and I can inform you that to be able to route the triangle
    mortises you should spend quite a lot of time on
    the router desk elevating the bit and transferring the fence in
    increments. I talked about and confirmed this method in my
    Fashionable Woodworking College class you can buy

Keys and mortises routed in the direction of the grain are probably the strongest miter joint reinforcement out there short of concealed dovetails.

Keys and mortises routed within the path of the grain are
most likely the strongest miter joint reinforcement methodology out
there, in need of hid dovetails.

Gluing up the joint

After spreading glue on the mitered surfaces,
the within partitions of the grooves and on the splines (or domino,
dowels, and so forth), marry the 2 miter banks collectively and reinforce
the joint with masking tape strips utilized on the skin. Now
add just a few clamps from each side of the joint to press the
miter even additional.

Dry fitting the joint to find our about any “surprises”

Dry becoming the joint to seek out out about any “surprises”

Reinforcing -live-edge-miter-joint-5.1

Spreading glue on the Domino keys, inside the mortises and on the miter joint banks.

Spreading glue on the Domino keys, contained in the mortises and on
the miter joint banks.

Clamping the miter joint together.

Clamping the miter joint collectively.

Reinforcing -live-edge-miter-joint-8

Subsequent time I’ll present the completed

 — Yoav

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