I'd appreciate some advice on beams for a pier and beam foundation. I'm planning to build one about 25' x 17' for a big shed/workshop (the superstructure won't be terribly heavy, I don't want to pay for poured concrete or have my yard torn up, there's a front to back slope that would require going down over four feet in front to get to the frost line in back, etc, that's why pier and beam). I plan to use 12" concrete piers to below frost line, and 2x10 beams and 2x8 joists to make a framed floor pretty much like a deck. Now the question - since the longest PT 2x10's from the local big boxes are 16', do I lose much load bearing by making a 25' beam from two 15' lengths and two 10' lengths - that is, double width and with the joints staggered, and the boards connected with 4" carriage bolts. Also, for connecting the beams to the piers it looks like strong-tie ABA anchors might be the way to go but again I'd welcome any other suggestions. Thanks!