We need to move an upstairs window by approx 600mm to make room for a new loft staircase. Currently there is a wooden lintel in place above the window which will need replacing.
The loft extenstion has a large beam directly above the new window position with a loading of 8KN on the wall (although not loaded yet as conversion not complete).
What type of lintel should I consider for this job - concrete, box steel or even a short length of UB? What are the relative strengths of these?
Note: The window is only 820mm wide and the walls are 9" solid (no cavity).
Thanks for any help.
Mark
The loft extenstion has a large beam directly above the new window position with a loading of 8KN on the wall (although not loaded yet as conversion not complete).
What type of lintel should I consider for this job - concrete, box steel or even a short length of UB? What are the relative strengths of these?
Note: The window is only 820mm wide and the walls are 9" solid (no cavity).
Thanks for any help.
Mark