Openning a supporting ? wall

[mattandluc]

Hi I am looking to create an opening in a wall. The opening will be around 2.6m, one end of the wall is up against an external wall the other end continues on to further internal walls.

The wall construction is concrete blocks with plasterboard in total about 6.5 inches thick.

There is no upstairs wall directly above the opening, however, the house is L shaped and it looks as though the floor joists above the planned opening change direction. On one side of the wall the upstairs floor joists run parallel on the other side they run 90 degrees to the wall.

I have the formula to calculate lintle load requirement where there is a wall directly above the planned opening but I can not find how to calculate lintle load for this project.

Any help would be great.
Thanks

 

[tony1851]

If there is no wall above, presumably it's just supporting a floor?

The dead load of a timber floor is typically taken as 0.5 to 0.6 kN/m2, the live load is 1.5kN/m2.

Remember that only one-half of the floor will be supported off your existing wall, the other half being supported at the other end. If you work out the floor area being supported, you can then work out the load it will put on your beam.

 

[mattandluc]

There is a very small (2.5 inch) stud wall with a walk through arch running parallel to the proposed opening, this is not directly above the wall but is about 60 - 70 cm away within the supported floor area.

Would I need to use the live or dead load, or both, for building regs and specifying the lintle.

Thanks

 

[tony1851]

There is a very small (2.5 inch) stud wall with a walk through arch running parallel to the proposed opening, this is not directly above the wall but is about 60 - 70 cm away within the supported floor area.

Would I need to use the live or dead load, or both, for building regs and specifying the lintle.

Thanks

If the partition is supported off the floor joists supported by the wall, then strictly an allowance needs to be made for that. It won't be the whole weight of the partition, but a proportion of it, which depends on how far it is from the wall, in relation to the span of the floor.

In practice, it shouldn't make that much difference to the loading - partitions are usually around 0.3kN/m2 or thereabouts. Your biggest loading will probably be the live load.

You should add the dead- and live loads to give a total load on your lintel.

 

[mattandluc]

Thats great, thank you for your help.