Final answer:
The maximum spacing between different sizes of joists or rafters is detailed in the building code, which specifies the construction standards to ensure safety. Architects, engineers, and contractors all play a role in applying these codes.
Step-by-step explanation:
The maximum spacing allowed between different sizes of joists or rafters is typically detailed in the building code. Building codes are regulations that specify the minimum standards for construction to ensure safety and health for residents and users. They take into account various factors, such as the type of material used, the span of the joists or rafters, and the load they are expected to carry, including weight from the roof, floors, and additional loads like snow.
An architect or contractor may interpret and apply these codes, but it's important to understand that the codes themselves specify the requirements. A structural engineer can also provide specifications for the design, including joist spacing, based on the particular needs of a project. The role of the contractor then is to carry out the construction according to the specifications provided by the architect or engineer, complying with building codes. Therefore, the correct answer to what lists the maximum spacing allowed between different sizes of joists or rafters is:
- Building code