In a solid joist floor, running pipes or wires means drilling holes—often in the wrong place, weakening the structure, or forcing you to build bulky dropped ceilings to hide the mess. With Posi-Joists, the services simply run through the open web. No drilling. No notching. No compromise. The void between the flanges becomes a pre-planned superhighway for your home’s nervous system: wiring, water lines, heating ducts, and even speaker cables all weave through the steel lattice without touching the timber.
A Posi-Joist isn’t just a piece of the frame—it’s a piece of intelligence. It accepts that modern homes are not just places to walk, but complex ecosystems of heat, power, and water. By lifting the floor slightly and adding a web of steel, it turns the forgotten space beneath your feet into a thing of elegant, functional beauty. posi-joists
At its core, a Posi-Joist is a hybrid. It consists of strong, solid timber flanges (top and bottom) connected by a sinusoidal or zig-zag steel web. This “I” shape gives it incredible strength-to-weight ratio. But unlike a traditional I-joist (made of OSB), the open steel web of a Posi-Joist is its superpower. In a solid joist floor, running pipes or
Because of their engineered design, Posi-joists can span much further than a traditional solid timber joist of the same depth. Want a 6-metre wide living room with no intermediate support wall? A Posi-Joist can handle it without the bounce or the “trampoline” feel of cheaper alternatives. The steel web distributes loads evenly, meaning fewer vibrations, less squeaking, and a floor that feels like concrete—solid, silent, and secure. No notching