Fire Rated Door Threshold

When speaking with manufacturers however a common statement is that a fire doors gap of up to 8 mm underneath the door is permissible.
Fire rated door threshold. Length is custom cut to size. Fire rated ul10b negative pressure. The threshold height can be adjusted to ensure a tight fit under a door. Use it to make a transition between flooring surfaces as well as to reduce the gap between a door and the floor.
D dark bronze anodized aluminum. With a ribbed top it offers more slip resistance than smooth top thresholds. This zero 70 high quality fire rated interlocking threshold prevents air wind and water infiltration. Not all doors in a commercial building need to be fire rated.
Bs9999 2008 recommends for fire doors with cold smoke control that the threshold gap should be either less than 3mm in height or should be fitted with a threshold seal. It is ideal for an exterior door and is compatible with both in swing or out swing doors. A mill finish aluminum aluminum. When nfpa 80 requires sills to have a minimum width of 4 inches some have interpreted that to mean that fire door assemblies are required to have a 4 inch wide threshold.
Add pemkote option to add a thermally infused anti skid coating to the threshold. This threshold has a seal to provide protection from the elements.