We use the same product – TJI joists – for the framing of the main level ceiling / attic floor. A TJI joist has two components – a web and two flanges. Each web is sandwiched between two flanges, creating the characteristic “I” shape. The web is manufactured from oriented strand board, and the flange from laminated veneer lumber. TJIs carry greater loads with less lumber compared to solid wood joists. They are straight, stable, and less prone to expansion and contraction due to moisture, creating a floor free of squeaks.
Floor joists hang from a hefty beam that spans the width of the house. The beam is in turn supported by ganged-up studs in strategically located load-bearing walls. The load is then transferred to concrete blocks and pier pads in the crawlspace.
In the picture below, we are clamping and bolting together a beam. The beam is made of three pieces sistered together after lifting them into place. The beam would be too heavy to lift into place as one unit – a 36 foot piece weighs in at about 200 pounds!
Stair stringers are fastened to the stairwell wall, creating a continuously supported staircase, sturdy and resistant to squeaking. Stringers require careful calculations and cutting to create level treads that rise equal distances. I have to accommodate for tread thickness and finish floor elevations. Your feet are smart enough to feel a slight difference!