construction is found in older buildings and utilizes large dimensional lumber for structural members and interior elements. These buildings hold up well under fire conditions, but it’s critical that firefighters not feel a false sense of security, as these buildings are often poorly maintained, or have termites and/or weathering issues that can contribute to an earlier-than-expected collapse.
Firefighters can identify these buildings by the large lumber used for walls and the long distance of roof spans. These buildings were most commonly built before 1960, when bolts and metal plates were used as connectors.
Vertical ventilation may be achieved on these buildings, but sawyers may encounter thicker-than-expected decking that may make for a longer completion of a ventilation hole.