I'm messing around a bit in an older school building where I'm supposed to demolish a partition wall. Everything suggests that it isn't load-bearing, but I thought I'd double-check if anyone knows what span the floor structure should be able to handle?
- Almost nine meters between outer walls
- The floor structure consists of logs, about 160x210 mm
- c/c 750 mm
- Unfinished cold attic on the top side with nailed, ungrooved, plank flooring.
- Boards, reed mat, and plaster on the underside.
- Almost nine meters between outer walls
- The floor structure consists of logs, about 160x210 mm
- c/c 750 mm
- Unfinished cold attic on the top side with nailed, ungrooved, plank flooring.
- Boards, reed mat, and plaster on the underside.
If the attic is completely unfurnished and not used for storage and you can expect a dead weight around 1 kN/sqm, the maximum span is about 7.5 meters. However, it cannot be used as a dance floor or similar activities.
Thank you. Do you know if there is any app or online tool that can be used for similar simple estimation calculations that go beyond what the TräGuiden's pocket guide can handle? I cut the studs in the wall today without a hint of binding in the saw blade, but maybe it's best to insert some kind of beam anyway.
The quality of the timber is an unknown variable in this context. I calculated as if your beams were C 24, but they might be much better.
I personally never use apps or online programs because I don't fully trust them. The raw elasticity theory is best. I do use the tables from Träguiden when appropriate. They are enormously reliable. What you can do when you encounter odd dimensions is to convert them to standardized ones. The moment of inertia is a geometric quantity used when calculating, for example, deflection. It is calculated using the formula bxh^3/12. The width times the height cubed, divided by twelve. You can use any unit you like, as long as you are consistent. I personally use centimeters out of old habit. The moment of inertia for 16x21 cm then becomes 12448 cm4. This corresponds to, for example, 4.5x32. You can only compare timber of the same class.
I personally never use apps or online programs because I don't fully trust them. The raw elasticity theory is best. I do use the tables from Träguiden when appropriate. They are enormously reliable. What you can do when you encounter odd dimensions is to convert them to standardized ones. The moment of inertia is a geometric quantity used when calculating, for example, deflection. It is calculated using the formula bxh^3/12. The width times the height cubed, divided by twelve. You can use any unit you like, as long as you are consistent. I personally use centimeters out of old habit. The moment of inertia for 16x21 cm then becomes 12448 cm4. This corresponds to, for example, 4.5x32. You can only compare timber of the same class.
Ok, big thanks for the help!