Lintel choice for attic window in gable end wall

[yoocan]

Hi,

I'd like to install a window in the gable end wall of our attic see below:

It only single leaf brick work at this level.

Which lintel type should I go for steel or concrete?

Would one of these cut to size do the job:

http://www.wickes.co.uk/Lintels-Internal/Internal-Lintel/invt/220067

or should I go for this:

http://www.diy.com/diy/jsp/bq/nav/n...refview=search&ts=1226859265608&isSearch=true

I'm slightly concerned that the concrete lintel will be visible from the outside. Also how should I go about removing mortar/brickwork in preparation for the lintel whilst reducing the vibration to the wall as I don't want it to collapse!

Thanks,

yoocan

 

[noseall]

i take it that the window head is high enough so that no purlin bearings are likely to affect it?

if so i would have thought an angle lintel will be sufficient.

a concrete p.c.c. lintel will also be adequate but ugly.

the first example will no be suitable.

 

[NS215]

one of these if only brickwork above
http://www.diy.com/diy/jsp/bq/nav/n...refview=search&ts=1226946574047&isSearch=true

 

[MadDesigner1]

Hello, first time using this site so accept my apologies for butting in on this topic. Noseall - you mention the purlin loads, I definitely have the purlin loads and I'm trying to cut through a single door. I think I require Wind posts, but all the wind post companies I've contacted don't seen to know what to do in this situation. Have you any pointers as to suppliers or calculations etc so I can design and manufacture them ? Thanks, regards, Paul

 

[JoeMar]

are you trying to put in a gable end window?

is this on a new build?

 

[MadDesigner1]

this is an old house circa 1920. The project is an attic conversion, the aperture is for a doorway / Juliet balcony as an escape route. The wall is a solid brick construction 230mm thick (2x 115mm brick side by side) Rendered on the outside. I was thinking along the lines of RSJ top and bottom and side wind posts bolted to them, but I can't find any technical details. Thanks.

 

[JoeMar]

you may need to get a Structural Engineer onboard to design the structure then have it built to spec.

 

[geraint]

as a conversion. have you a ridge beam in place... ie a steel... not enough information..

 

[MadDesigner1]

Hi, the timber at the ridge you could hardly call a ridge beam the section is 175mm x 40mm. The main load bearers are 4 purlins 2 of which are going to transmit on the door sides. I've uploaded a drawing. Thanks.