On a tight infill site, a builder sets PSL beams to support projecting balconies.
The crane begins to hoist a garage header beam into place. These steel beams are sized to carry wall loads for three stories of building above.
A carpenter makes a mark through the pre-drilled bolt hole prior to drilling a bolt hole in the 2x6 nailer.
A view of the structure from below shows how the steel beam supports the floor system as well as the cantilevered beams for the balconies.
One upper-story wall in place above the garage opening. The cantilevered floor trusses carry significant wall loads down onto the steel I-beams (by comparison, the loads of the balconies are relatively less important).
A carpenter attaches a lifting strap to a PSL beam for an upper-story balcony support.
The crane picks up the heavy beam in the narrow space between the new structure and the existing neighboring building.