Under which circumstances is the girder method of floor framing typically used?

The girder method of floor framing is commonly utilized in situations where homes are constructed over a basement. This technique is beneficial because it allows for a solid structural support system that can accommodate the additional loads imposed by the building above. Girders create a level surface, distributing the weight of the structure evenly and providing adequate support for the floor joists.

In these scenarios, the girder acts as the primary horizontal beam, supporting the vertical loads from the floors above while creating an open span that is essential for basements. This design not only enhances the structural integrity of the home but also offers possibilities for additional space and functionality within the basement area. In contrast, framing options like platform framing are often more suitable for other scenarios, such as building over a crawlspace or using more traditional methods in extreme climates, where different techniques might be more effective in addressing insulation and weatherproofing needs.