Obviously the boards with the grooves on left of pic will weigh less, but do the grooves make them stiffer in the long direction as well?
>>2941915here let me search that for you since its so much more effort than making a thread with a stupid question instead of asking in the general https://presearch.com/search?q=why%20are%20deck%20boards%20grooved
Seems like all the results are about edge grooves, or minimal depth face grooves. Having a hard time finding info specifically about these deep grooves on hidden side. Maybe "grooves" is not the right term.
>>2941915Stiffer than what? My dick? Lolno. Even at 50+ my dick mogs that board. But seriously, how is a board with material removed going to be stiffer than a board that's still complete? It may be almost as stiff, but weigh less, but it won't be any stiffer.
>>2941926Probably the same reason corrugated cardboard is more stiff and resistant to bending than solid card of the same weight. Or an I-beam is stiffer than a box tube of the same weight. It all depends on the forces involved and what angle/point they act on the material.
none of them seem to be wood?
>>2941944Cardboard is already a corrugated material, that's like triple the variables, and an I beam is a totally different shape than a box tube. Be real here.
>>2941915The solid ones will be stiffer in all directions, they're significantly heavier to get that stiffness, but they are stiffer.>>2941953Composite deck boards my dude. They're expensive, but they look nice, and last forever.
>>2941919>Maybe "grooves" is not the right term.They call it "scalloping"
>>2941915if everything else is the same, yes
>>2941986>trex branding = green light!>don't fall for other brands, they aren't as good as trex brand trex boards made by the trex company!
>>2941926>It may be almost as stiff, but weigh less, but it won't be any stiffer.I think this is correct, but only if the material is homogeneous.If the skin/veneer is significantly stronger than the infill, it would be stiffer with the scalloping, since there is more of the strong material at the perimeter.
just frame 12" on center and you won't have to give a shit.
>>2941915Deck boards are made stiff by the joists underneath. Joist spacing is reduced if you're a cunt and want your deck boards laid out diagonally.
