What are the design requirements for concrete and clay roof tiles to withstand aerodynamic uplift moments as specified in the 2018 International Building Code?

The 2018 International Building Code specifies that concrete and clay roof tiles must be designed to withstand aerodynamic uplift moments using Equation 16-34. The design involves factors like wind velocity pressure, lift coefficient, and roof pressure coefficient. Roof tiles must be installed on solid sheathing, have a minimum head lap, and meet specific size and installation requirements.

The design requirements for concrete and clay roof tiles to withstand aerodynamic uplift moments, as specified in the 2018 International Building Code, involve calculating the aerodynamic uplift moment using Equation 16-34. This calculation includes variables such as wind velocity pressure (qh), lift coefficient (CL), roof pressure coefficient (GCp), and dimensions of the tiles (b, L, and La). The lift coefficient for these tiles is typically 0.2 unless determined by testing. The tiles must be installed on solid sheathing, have a minimum head lap of 2 inches, and adhere to specific size limits for length, width, and thickness. Additionally, installation methods can include loose laying on battens, mechanical fastening, mortar setting, or adhesive setting, with specific conditions for each method.