I was thinking of asking for help with reinforcing the floor joists during a kitchen construction...
The house is from 1893, with a span in the room of 4.8m. The current joists measure 150x120 and are about 120 on center. In other words, there's a noticeable bounce, and I would like to address this in the kitchen...
What options do you see? I would prefer not to build higher, but 160 high joists might work without making the difference between the rooms too great.
Thought I'd ask for help regarding the reinforcement of the floor structure during kitchen construction...
The house is from 1893, with a span in the room of 4.8m. The current beams measure 150x120 and are about 120 center-to-center. In other words, a noticeable bounce, and particularly in the kitchen, I'd like to address it...
What alternatives do you see? I'd prefer not to build more height, but 160 high beams might work without making the difference between rooms too large.
Regards, Johan
The only possibility with that span is steel. But clearly, anything higher than 150 will be better than today.
Can't you come in underneath and cast a few pillars or similar?
Unfortunately, the boiler room is directly below with accumulator tanks and pipes crisscrossing, so reinforcing there is not appealing.
If I sacrifice a little height, how would a glulam beam in 180x42 affect it? I am thinking of 30 cm centers, even double beams and blocking if that would help alleviate sagging?
I can't quite calculate this. But spontaneously, even glulam 180x42 is too weak for that span. If you're going to follow deflection and sway rules, I think it requires at least 220x45 C24 joists with screwed and glued floor particleboard. 4.8 meters is a long span for a floor structure.
Here's what Svenskt Trä suggests with your conditions.
Thank you vectrex! I have demolished further and shoveled out old fill material. It turned out that under the 1" plank there was another longitudinal 2" board under the current beams. If I remove all this and leave the basement's ceiling, I can fit in 260mm beams without compromising the final floor height.
What would then be preferable, 225x45 C24 and screwed, glued floor chipboard?
I would invest in new glulam beams between the old logs. 140x225 is sufficient. No screwed plywood flooring, it usually gets troublesome with old timber. To mitigate the significance of the old logs being weaker, you can choose sturdier floorboards, about 35 mm thick. Combinations of boards and wood are naturally also conceivable.
Click here to reply
Vi vill skicka notiser för ämnen du bevakar och händelser som berör dig.
