Intent 1:
To exempt metal frames of windows and doors from
the requirements for a thermal break, on the basis that they are installed
as:
- vehicular access doors,
- storm windows and doors, or
- windows and doors that are required to have a fire-resistance
rating, where:
- practical construction limitations outweigh the need
for thermal protection (vehicular access doors),
- thermally broken layers are inherent to the design (storm
windows and doors), or
- other Code considerations take precedence (required
fire-resistance rating).