When are stretchers needed for a table?

[radhak]

I thought stretchers make a table rack-proof. But also find many tables without stretchers :

Then, where do designs like the below get their strength? Will just the joints (M&T) suffice?



Is there any guideline on when are stretchers needed?

[gary]

Yes, tables like this are strong enough but are more fragile than if you had stretchers.



A haunched mortise and tenon provides more strength imho

[dbhost]

When are the stretchers needed...

A lot sooner than back in my college days. I think about 8 or 9 margaritas should do the trick!

[drumpriest]

radhak, I am not entirely sure when it's correct to have stretchers, I do it when I want overkill, and they won't get in the way. When I'm building for the kids (nieces, nephew, and my little guy when he needs stuff), I'll overkill like crazy, never know what they'll do to it.

I didn't use it for this...


But I was able to lay down on that table without it even complaining, so it's plenty strong with the mortise and tenon joints. I would think on a desk like that one, it wouldn't be a problem, not so likely that someone sits on it, etc...

[cabinetman]

The size of the apron and the fit of the joint will determine the strength. The apron/leg joint acts like a gusset for the leg. If they fit in the design and purpose of the furniture, stretchers do add strength.
.

[crokett]

What is the advantage to the haunched M/T? I would think a full tenon is stronger since a haunched one you are removing part of the tenon.