View Single Post
  #7   Report Post  
Posted to uk.d-i-y
John Rumm John Rumm is offline
external usenet poster
 
Posts: 25,191
Default adding loading to old RSJ

sm_jamieson wrote:
I have just exposed the existing RSJs to which new load is to be
applied to support my roof.


We would need more detail of the roof construction...

Clay tiles are about 0.77 kN/m^2 for example.

The BCO said the bearings may need to be exposed but has said nothing
more. For peace of mind I
probably need a structural engineer to check things, but can anyone
give a rough feel for the loadings here ?

Old fashioned RSJ, width 125mm, height 150mm, flange thickness 10mm at
the edges, 15mm at the web,
web thickness 10mm. Span is 2800mm. Can anyone tell me what type of
loads this beam can take (assuming bearings are OK). Also, what type
of point load could it take near the middle of the span ?


Quite substantial!

I had a little play in SB4, and assuming I selected the appropriate beam
(i.e. please don't take my word for it - try it yourself!), it looks
like it would cope with a point load of just over 57kN in the middle of
the span!


--
Cheers,

John.

/================================================== ===============\
| Internode Ltd - http://www.internode.co.uk |
|-----------------------------------------------------------------|
| John Rumm - john(at)internode(dot)co(dot)uk |
\================================================= ================/