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20 votes

What might be stronger than a miter but still look like a miter joint?

There are many hidden reinforcements you could use - biscuits, dowels, or more complex hidden joints such as these: Mitred corner dovetail joint Mitred blind dovetail joint ... but I wouldn't ...
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  • 3,789
16 votes
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How can I determine the load capacity of a simple bench?

The 4x4 posts used for the legs support virtually "infinite" weight longitudinally. Now, of course, given a naive design, each leg would only transmit force onto one 4x2 beam (which are then maybe ...
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  • 3,805
14 votes

How can I determine the load capacity of a simple bench?

When determining the load bearing capacity of any structure, you'll need to take into account several different factors: Acceptable deflection Maximum allowable bending stress Column compressive and ...
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  • 4,328
12 votes

What might be stronger than a miter but still look like a miter joint?

How might this joint be constructed so that it is strong enough to prevent racking but still appear to be a miter? It's not racking that is the major concern here, it would be (probably sudden!) ...
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  • 59k
11 votes

How can I determine the load capacity of a simple bench?

Just to find the load bearing capacity of the horizontal bench top, I'd treat it like a shelf and run the numbers through some sort of load-bearing calculator like the sagulator. The load-bearing ...
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7 votes

What might be stronger than a miter but still look like a miter joint?

I've thought about this some more and have come up with an alternative solution. If I had to make this bench and be sure that the joints won't break over time, I'd want to look at some real ...
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  • 3,789
7 votes
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Is this frame design sturdy enough for a window seat?

In terms of compression strength, I wouldn't want to park a big car on top of it - but even a couple of drunken teenagers jumping up and down should be fine. As others have commented, racking side-to-...
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5 votes

What might be stronger than a miter but still look like a miter joint?

While I may (justifiably) be shunned for bringing it up, it is possible to get right-angled dowels. http://www.fastenersplus.com/90-degree-right-angle-furniture-dowel-pkg-3.html This will prevent any ...
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4 votes

What might be stronger than a miter but still look like a miter joint?

Metal Brace This is not my area of specialty at all but if I had to guess I would say that there are some metal brackets hiding underneath the joins that we cannot see. Quite possibly in conjunction ...
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  • 20k
4 votes

Shelf made of 1x2 pine boards. Stable?

Each shelf is capable of holding the load that you are intending with shearing or sagging. Where this design fails is in racking, both front to back and side to side. Traditional shelves are built ...
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  • 1,828
4 votes

Shelf made of 1x2 pine boards. Stable?

The weakest part of the design is how your substantial load is being carried to the uprights. There's not that much you can do for those joints as drawn... I'd suggest you add actual 1x2 members ...
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3 votes

Reinforce bunk bed

Let me suggest a simpler, but more radical approach. Drive several long screws through the bed rail which is against the wall, and into 2x4s in the wall. You'll need to locate the studs, of course, ...
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3 votes

Reinforce bunk bed

The pine 2X2 corner uprights are skimpy ( have low modulus). I think it will require significant diagonal bracing in most corners to stiffen it. I used 1X4 oak boards connected in a "L" for ...
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3 votes

Reinforce bunk bed

I would re-check that you have really tightened all the barrel bolts The ones that lock the post and prevent the racking are the bottom headboards and the 4 top safety rails. Tightening the bottom ...
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3 votes
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What supports do legs need on a very short workbench

This is intended to be my main workbench, and will be used for all of my hand tool work A rock solid desk that doesn't shake or wobble would seem to be a requirement for hand tool work of any kind. ...
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3 votes
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Flip-Cart for Wood Planer - Best Hardware and Construction

The easiest improvement I can think of is to insert a metal sleeve (or bushing) in the opening for the axle. This should eliminate a lot of the wear and tear caused by the bolt axle on the wood in the ...
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3 votes
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How can I strengthen my 3/4" Plywood Bunk Bed Plan?

I plan on using 3/4 plywood (.706 or so) with 3/8" dowels and some pocket screws (as well as titebond). I don't want to over or under engineer it. Actually you should seek to over-engineer this, or ...
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  • 59k
3 votes

How can I strengthen my 3/4" Plywood Bunk Bed Plan?

The easiest way to prevent racking would be to replace the slats at the head and foot of the mattress supports with a solid piece of plywood approx 1' wide that is solidly connected to the three sides ...
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2 votes
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What might be stronger than a miter but still look like a miter joint?

Besides mitered versions of various types of other sufficiently strong joinery methods, you could use non-mitered versions of any of those, and more (dovetail, dowels, Domino, mortise and tenon, box ...
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  • 18.6k
2 votes

How can I determine the load capacity of a simple bench?

You can always take the Calvin & Hobbes approach!
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2 votes

Shelf made of 1x2 pine boards. Stable?

The sagulator calculates a sag of 0.03 in over 24" for a 50 lb uniform load on a single 1x2 of (Ponderosa) pine laying on its face. So your 4-board shelf should be stable given that weight load. A 12" ...
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  • 2,602
2 votes

How likely is it that my kids will break this bench?

The weakest point ended up being the half-laps (as predicted by @SaSSafraS1232):
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  • 197
2 votes

Can I use paracord to prevent a Large desk from racking?

Im afraid of the table swaying or racking...and was wondering if I could use paracord to diagnolly brace the legs to prevent this No. Real, military-spec paracord is required to stretch a minimum of ...
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  • 7,658
1 vote

Is 1/8" plywood enough to prevent racking or do I need 1/4"?

The great thing about preventing racking is that it can be done completely through tension. Almost any normal construction material is quite strong in tension. 1/8" plywood should be fine, as ...
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1 vote
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How likely is it that my kids will break this bench?

If the occupants of the bench rock to the left and right, the wedge will apply a large force on the end of the pegged tenon. The expected failure point is marked in the image. A combined weight of ...
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1 vote

How can I strengthen my 3/4" Plywood Bunk Bed Plan?

While this is a great design overall, I'd be a tiny bit concerned about the pocket screws resisting side to side racking. If you could make one (long) side out of a single sheet of ply, the other side ...
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1 vote

What might be stronger than a miter but still look like a miter joint?

I own the bench along with the matching table. It is a simple frame constructed with 2x3 dimension lumber; a simple reclaimed board veneer with miters.
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