Concrete lintel above workshop door

Discussion in 'Builders' Talk' started by Brian Lightfoot, Apr 30, 2020.

  1. Brian Lightfoot

    Brian Lightfoot New Member

    I am building a concrete workshop which will have a doorway 1.8 m wide. I am looking to put a concrete lintel above this which will support a single coarse of blocks and the flat roof. Would a 100 x 65 lintel be sufficient given that there is very little weight above or should I go bigger. Any advice greatly appreciated
     
  2. blarblarblarblar

    blarblarblarblar Active Member

    Me, deffo go bigger, not much more in cost
     
  3. Brian Lightfoot

    Brian Lightfoot New Member

    Thank for your reply, What size would you propose, 140 x 100?
     
  4. Jitender

    Jitender Screwfix Select

    Is it single single blocks or a cavity?

    Put in a 140×100mm lintel ast year, they are heavy!

    Plus will need ideally 150mm overhang each side. So put 300mm on top of opening.
     
  5. Hans_25

    Hans_25 Screwfix Select

  6. Brian Lightfoot

    Brian Lightfoot New Member

    Its single skin, but there are pillars either side of doorway. It is the weight for getting it up there I was worried about. That was why I hoped as the load is only I couse and the flat roof, the 65 might have been sufficient
     
  7. Hans_25

    Hans_25 Screwfix Select

    Alwaysworking likes this.
  8. Alwaysworking

    Alwaysworking Active Member

    I'd go for the one suggested by Hans...
     
  9. Nev Hope

    Nev Hope Active Member

    140 x 100, because then a course of concrete commons is quicker than cutting blocks ;)
     
  10. Brian Lightfoot

    Brian Lightfoot New Member

    Sorry New hope, what do you mean by this or was it a typo?
     
  11. Jitender

    Jitender Screwfix Select

    A 65×100 prestressed lintel wil be more than ample.

    Builders merchants I have found usually only stock 65×100 or 100×140 lintels.
     
  12. Nev Hope

    Nev Hope Active Member

    140 x 100mm lintel bedded plus 1 course of concrete common is 1 block course in height, whereas if you use a 100 x 100mm you need to cut blocks over the lintel.
     
  13. Brian Lightfoot

    Brian Lightfoot New Member

    Ok so you mean put lintel in 140 mm upwards with a course of common blocks on top. Would tie in with a course of standard blocks either side of the lintel?
     
  14. Brian Lightfoot

    Brian Lightfoot New Member

    Have decided to go for 100 x140 to be on the safe side. I was advised to build piers for the doorway for strength but after I had already put in foundation. If I install them, the piers are going to overhang the main foundation by about 15mm internally. They will be sitting on 100mm deep concrete floor for that 15mm though. Do you think that will be Okay?
     
  15. Abrickie

    Abrickie Screwfix Select

    Absolutely fine:)
     
    Brian Lightfoot likes this.
  16. Brian Lightfoot

    Brian Lightfoot New Member

    Thank you for the advice
     
    Abrickie likes this.

Share This Page

  1. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
    By continuing to use this site, you are consenting to our use of cookies.
    Dismiss Notice