Sagging steel ibeam

[playford]

Hi Guys,

I live in a coach house style building that is contructed on steel i-beams and a floating concrete floor. For a while we have noticed issues with doors not shutting and gaps from the floor to skirting.

Today I used my laser level with a tripod to check and I've seen nearly a inch sag in the centre beam of the house and now need to get a building surveyor in to check it.

I was wondering if anyone can recommend a structeral surveyor in the south London area firstly and also, is there a way of strengthening an i-beam or would it need to be replaced?

Many Thanks
Mark

 

[tony1851]

What is the span of the beams, their section sizes, and the area of floor each supports?

 

[^woody^]

Structural Engineer, not surveyor or building surveyor

 

[playford]

Thanks guys, Ill get the mesurments in the morning and reply with them