Purlins and girts are the horizontal beams that support the roof and wall panels. They are shaped like Zs with reinforced edges.

Eave struts are the angled beams that connect the roof and wall at the corners. They are shaped like Cs with unequal sides. The top side parallels the roof slope, and the bottom is more comprehensive. Both sides have a small lip for extra strength.

Bracings are the cables or rods that keep the building stable against wind, cranes, and earthquakes. They are placed diagonally across the roof and wall frames.

Open steel web joists are lightweight,d intense beams that hold up the roof or floor deck. They transfer the weight of the deck to the mainframes. They are a cost-effective and efficient way to build roofs and floors.