Ceilings have a way of really showing defects when the drywall is not installed properly. While the visibility of ceiling defects can be reduced e. Everyone likes a clean-look drywall ceiling! The first step in preparing the ceiling is to ensure there are no major issues with the sub-structure of the joists above, no plumbing or electrical issues to be addressed, and that, in general, you can live with a sealed ceiling. Strapping a ceiling is the process of installing wood or, in advanced installations, another material perpendicular to the joists. The strapping serves as the nailing surface for the drywall.
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Steel Joist Installation: From the Ground Up | Metal Construction News
Log in. Sign Up. Elements shall be straight and free of any defects that would significantly affect their structural performance. Cold-formed steel roof framing members shall be in accordance with the requirements of this section. The provisions of this section shall control the construction of cold-formed steel roof framing for buildings not greater than 60 feet 18 mm perpendicular to the joist, rafter or truss span, not greater than 40 feet 12 mm in width parallel to the joist span or truss, less than or equal to three stories above grade plane and with roof slopes not less than percent slope or greater than percent slope.
How to Strap a Ceiling Before Installing Drywall
Block and strap bridging is installed to prevent joist rotation and lateral movement. Solid blocking, a field-cut track or joist section, is welded or screw-attached between the first and last two outer joist bays and at a maximum of 8' O. Two-inch wide corrosion resistant strapping is also screw-attached or welded to the bottom of every joist flange. Lateral support on the top flanges is usually provided by sub floor or deck material. Spacing of bridging must be calculated based on the required strength.
A joist is a horizontal structural member used in framing to span an open space, often between beams that subsequently transfer loads to vertical members. When incorporated into a floor framing system, joists serve to provide stiffness to the subfloor sheathing, allowing it to function as a horizontal diaphragm. Joists are often doubled or tripled, placed side by side, where conditions warrant, such as where wall partitions require support. Joists are either made of wood, engineered wood , or steel, each of which have unique characteristics.