Which lintel for a new build garage with 16ft door?

[sab291004]

Hi All,

I'm in the process of planning a garage build and needed some advice before submitting for permission.

I'm going to apply for a 6m x 6m double garage on my property and would like to install a 16ft garage door. I think this would look better than having two separate doors with a brick pier in the centre.

The plan is to have a flat roof covered with boards and then either rubber or traditional felt, so not as much loading on the structure.

I'd greatly appreciate suggestions as to what lintel I should use beairng in mind this will need to be 17ft or 5.2m if i'm correct? (opening plus 150mm at either side)

At my last house that had a 14ft garage door it was a very large timber that was the lintel. I can't seem to find any such size timber that would do the job.

I've looked at catnic inverted T beams but these stop at 4.8m in length.

I'm leaning towards an rsj, but in my head this seems a little extreme given the loading that will be put on it (though i appreciate you have to account for wind/snow etc as well as the weight of sheet timber and felt)

I'm an enthusiastic DIY'er and like to have a grasp of anything that I do!

Any thoughts/suggestions much appreciated.

Lee

 

[noseall]

A steel beam seems sensible to me.

Get some holes drilled into the top flange so that you can bolt a timber plate to the top.

May be worth getting some drilled in the web to help facilitate fixing internal and external fascias etc.

 

[sab291004]

Great stuff thanks very much for the speedy reply.

Lee

 

[i_am_fubar]

I you really want to do your homework, look up the following
- beam deflection maths
- second moment of area
- moment of inertia
- young's modulus

With those under your belt, you can calculate the deflection of your steel under maximum loading.

Tis what I did for my low profile lintels and worked a treat... Plus it looks good it BCO ever asks for calcs

Fubar.

 

[trowlerman]

sounds lie a job for a steel ,ive just put one in over some patio doors that were about 5 m wide .