Hello,
I know there are many threads with questions about load distribution, but the circumstances are always so specific that it's difficult to draw conclusions on your own. Therefore, I am creating this tailored thread, although it addresses what is likely a common problem.
An extension is to be added to a rectangular house with a gable roof, measuring 13.5x8.5 meters. The extension will be angled with a gable roof, and the facade of the extension will be a continuation of the existing gable. The extension framework is 3566 mm wide (3928 mm long), and they want to open up the outer wall along this length so that it is completely open to the extension. Additionally, the extension will have a sloping roof, so there will be a laminated wood beam at the ridge.
If a pillar could be placed in the middle of the opening to the extension, everything would be simple. But the request for the opening means a beam over the opening is needed, which in the middle supports the pillar for the extension's ridge beam. The point load on this pillar is, according to construction descriptions, 15.793 kN.
Supporting both the existing roof trusses and the point load from the extension's internal pillar with a single beam doesn't seem feasible, so my thought was to create two supports. First, support the opening in the existing outer wall—I can calculate that myself. The second support is right at the start of the extension, a beam that spans the entire width (3566 mm) and can handle a point load in the middle of 15.793 kN. Is there a beam that can handle this? Unfortunately, this scenario is not included in construction descriptions' dimensioning help.
I know there are many threads with questions about load distribution, but the circumstances are always so specific that it's difficult to draw conclusions on your own. Therefore, I am creating this tailored thread, although it addresses what is likely a common problem.
An extension is to be added to a rectangular house with a gable roof, measuring 13.5x8.5 meters. The extension will be angled with a gable roof, and the facade of the extension will be a continuation of the existing gable. The extension framework is 3566 mm wide (3928 mm long), and they want to open up the outer wall along this length so that it is completely open to the extension. Additionally, the extension will have a sloping roof, so there will be a laminated wood beam at the ridge.
If a pillar could be placed in the middle of the opening to the extension, everything would be simple. But the request for the opening means a beam over the opening is needed, which in the middle supports the pillar for the extension's ridge beam. The point load on this pillar is, according to construction descriptions, 15.793 kN.
Supporting both the existing roof trusses and the point load from the extension's internal pillar with a single beam doesn't seem feasible, so my thought was to create two supports. First, support the opening in the existing outer wall—I can calculate that myself. The second support is right at the start of the extension, a beam that spans the entire width (3566 mm) and can handle a point load in the middle of 15.793 kN. Is there a beam that can handle this? Unfortunately, this scenario is not included in construction descriptions' dimensioning help.
