Doubling up lintels

[martyc]

Guys ive to double up lintels over a door.
Just to confirm really....is there a bed of mortar required between lintels?
Cheers,
Marty.

 

[noseall]

concrete or steel?

 

[martyc]

concrete...4 inch wide 3 high...10.5 feet long
cheers,
Marty,

(im guessing the fact u asked which then it requires mortar)
also should i stick a few wallties thru them to prop the insulation??

 

[splinter]

I would not of thought that 2 three inch lintels would be suitable for that span ,as they would be acting as individual lintets .Isuggest a single concretelintel of the right proportions for this span or a catnic lintel

 

[martyc]

span is 8 foot 4 only...ive a foot bearing either side.

 

[splinter]

Well Martyc,Itwas only my opinion based on the the dimensions you gave which I beleive was 10.5 long.Even on a 8ft span a 3" lintel would not be good enough ,because the length in relation to thedepth would cause the lintel to sag or break

 

[jeds]

Splinter is right. Those lintels are way too small for that span. Can you even get 10ft long 3" lintels? I've seen them maybe 6 or 7ft long but I don't think I've ever seen them anywhere near 10ft.

Anyway, steel lintels will be cheaper than concrete for those spans and a lot lighter - so easier to handle. Size depends on loadings?

 

[martyc]

Splinter maybe ive the wrong term or something...these are concrete lintels with steel running thru them...10'6" and i just received 6 of em!(4 inch wide and 3 inch tall)
And there not too heavy either..2 pairs of hands and their easy manage.
Maybe its a regs difference thing...regs here only require steel after 9 foot of an opening.
Anyway i have em now so id like to use em!!
Load is 7 courses of dense 4" block capped off.

So...mortar and/or wallties between the lintels or not?(im doubling them up on a SE's advice, so there will be 4 altogether over the opening.
Marty.

 

[noseall]

yes, sandwich some mortar between them.

 

[noseall]

i hear using two lintels in Ireland is quite popular, it's called.......



































Dublin.

 

[martyc]

Take you coat!!

Right have 2 of them in...had to build a tent around the whole thing as it raining all day...
Cheers,
Marty.