question for a structural engineer

[kgray1]

Any structural engineers out there willing to give some advice?

Could anyone tell me if a 6" x 4" rsj, covering a 3m span, with 100mm bearing each end, sitting on 225mm wide pad stones will be sufficient to support floor above?

No walls above, only floor and furniture. One end of beam will be into inside skin of external wall (gable end) other end into an internal wall which goes up through first floor and is carrying staircase on other side.

Thanks for any advice which can be given, it will be gratefully received.

 

[tony1851]

Before anyone could answer that, you would need to supply the area of floor supported. Clearly one part of this calculation is the 3m span, but what about the length of floor supported at right-angles to the beam?

Also, you say it is only supporting a floor. This would be unusual in a house. Is there a wall upstairs - even few feet offset fom the wall you are taking out - which may be supported off the floor?

 

[kgray1]

Area of floor supported is approx 16 square metres (3m wide x 5.3m long).

This is divided on first floor into a bedroom, landing and bathroom. Dividing wall between bedroom and landing is lightweight block set on top of floorboards/joists, which is offset from supporting wall to underneath by 600mm. Bathroom wall same construction and another 800mm further from support wall.

Joist spans are 2.8m on one side of supporting wall and 2.5m on other side. Running front to back of house. The shorter spanning joists actually overlap the others by approx 900mm so that both sets of joists actually run under the bedroom/landing wall.

Is this info detailed enough or do I need to explain it better?

Thanks