Hello!
There are some threads on the subject but also many opinions... What do you think about the following case:
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Kitchen floor from 1909 with beams approximately 80x200 c/c 900, L4700 continuous over two spans (1900+2800).
End supports on masonry cellar walls. The middle support is on a beam (a bit rickety at one end) that is embedded at the top of the masonry cellar center wall.
The structure was reinforced in 1955 with nailed 45x200, but not over the middle support. Some rot damage was also repaired then.
The old floor sloped 50mm and the floorboards 28mm sagged and creaked under a similarly creaky parquet floor.
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If one now adjusts (50mm slope) by screwing/gluing laminated timber 42x180 on each side of the existing ones with long 8mm screws (or drill+threaded rod through everything perhaps?)
Then it will be c/c approximately 700 between the new beams. That is more than the 600 that the 22mm chipboard flooring wants.
If one then braces near the outer wall and onto these sets an additional beam 42x180 in the middle of each span.
Then we have at most c/c 350 between.
Then glue+screw 22mm chipboard flooring.
- Is the principle okay?
- The sizing? (42x180 laminated timber retrieved from table on TräGuiden)
- Is support on bracing at the ends completely okay or should the support be made in the cellar wall like the existing ones?
(Sorry for the somewhat messy image but it might be interpretable anyway. Loose short boards are for the bottom under the now removed chip fill, underneath at the bottom we have the cellar ceiling)
/Anders
There are some threads on the subject but also many opinions... What do you think about the following case:
---
Kitchen floor from 1909 with beams approximately 80x200 c/c 900, L4700 continuous over two spans (1900+2800).
End supports on masonry cellar walls. The middle support is on a beam (a bit rickety at one end) that is embedded at the top of the masonry cellar center wall.
The structure was reinforced in 1955 with nailed 45x200, but not over the middle support. Some rot damage was also repaired then.
The old floor sloped 50mm and the floorboards 28mm sagged and creaked under a similarly creaky parquet floor.
---
If one now adjusts (50mm slope) by screwing/gluing laminated timber 42x180 on each side of the existing ones with long 8mm screws (or drill+threaded rod through everything perhaps?)
Then it will be c/c approximately 700 between the new beams. That is more than the 600 that the 22mm chipboard flooring wants.
If one then braces near the outer wall and onto these sets an additional beam 42x180 in the middle of each span.
Then we have at most c/c 350 between.
Then glue+screw 22mm chipboard flooring.
- Is the principle okay?
- The sizing? (42x180 laminated timber retrieved from table on TräGuiden)
- Is support on bracing at the ends completely okay or should the support be made in the cellar wall like the existing ones?
(Sorry for the somewhat messy image but it might be interpretable anyway. Loose short boards are for the bottom under the now removed chip fill, underneath at the bottom we have the cellar ceiling)
/Anders
I can buy the principle. Hanging up the new center beam in noggings near the walls seems sensible. The point loads on the old beams are OK so close to their supports. What are you going to have on top of the chipboard?
Industrial parquet is an excellent material. Indestructible.