Those are part of the legs; if there is a good enough support structure inside them they’ll be fine. The central cushion is part of the back.
Did you look through the photos at this link?: matthewpauk.com
There are some “assembly” pictures of the sofa in progress. Lotsa wood n’ stuff. Looks like the free edge is supported by virtue of being wood bolted to and resting on other wood 24" away. I’ve seen porches with that much free corner perfectly capable of holding my fat butt.
What “those” are part of the legs? The central cushion, yes, is probably part of the back, but it is not attached to the two side cushions. It can’t be since it is separated from them by the pull out table.
The two side sitting cushions are part of the legs. The arm cushions are part of the back.
Must have!
Give me now!
Not to get bogged down in semantics, but no. the armrests and the back are also the legs. The two sitting cushions are attached to them, and are pretty much three-legged chairs. The common back means they won’t tip inward. I don’t know enough about woodworking to say whether the frame (which you can see bare in one of the pics from WhyNot’s link – thanks, Whynot) is sturdy enough or not. It looks iffy to me it it were to get a lot of use, especially if people perched on the outer edge. And I would be willing to be there’s a whole lot less structural support in it than there would be under a porch.
That frame looks pretty hefty. Properly constructed they should do well. If it’s done on the cheap expect the outer two seats to sag after a while. If you were going to have the table and ottomans pulled out a lot of the time it would probably be best to have some additional support at the corners of the two seats.
We musn’t be looking at the same pictures. The legs are the side seating cushions; the side seating cushions are not attached to the legs, they are the legs; they are not the same piece as the back. The back, as you say, keeps the sidecushions/legs from moving up, therefore from falling forward-and-down. What I’m talking about when I mention “support” is the cushion itself, not the frame: if the cushion was soft it would bend, but it seems to be rigid enough to not do so under normal circumstances.
Are you using the term “seating cushions” to describe the same things that I am calling “armrests”? I assume by “seating cushion” you mean a cushion one sits on, and those cushions are not the legs.
Yeah, if they just had some fold-out temporary legs that could be moved into position when the table was out, the problem would be solved. I see no evidence of that in the current implementation, however.