Sizing for wide garage door

[Zeko]

I'm tired of surfing for different construction solutions for a garage with a wide door, so I'm taking a chance by posting a question here.

I plan to build a double garage at 6240x8085 with a door from Crawford (g30 Line) at 5000x2100. The door should be mounted in some kind of frame (according to the minimum dimensions Crawford recommends), BUT...what dimension should the upper supporting beam have (the one the door "hangs" from) ??? ?

Glulam might be preferable since I realize the door probably weighs quite a bit, and I don't want the door to start sagging in the middle. But on the other hand, I would prefer not to exceed a ceiling height of 2.30 m.

So, please, all of you who own a garage with a wide door...how have you solved this?

 

[MathiasS]

A glulam beam is probably too high.

An I-beam or H-beam should do the trick.

 

[Jesca_j]

Now I don't quite understand what you mean, but the gate stands against the ground when closed, so it's not that heavy.

When you open the gate, it will hang in the steel profiles in which the gate's bearings roll. These steel profiles are screwed to the ceiling with some bolts.

The gate probably doesn't weigh more than 100-200kg, and that's not much distributed over a few bolts/screws?

Now maybe I've misunderstood the question somehow.....

 

[MrMagic]

However, of course, a substantial beam is required ABOVE the gateway to support the roof......

 

[Jesca_j]

Okay, maybe that's what he meant... :-[

 

[Zeko]

Knew there were knowledgeable people on this forum ;D !

Suspected that a glulam beam would take up too much space.
An I or H beam sounds interesting, but I hoped to avoid such a "heavy" solution.

Jesca_j: Honestly, I don't know what the door will weigh, but if it's 100-200 kg as you say, then maybe it's not a problem (I've just heard that the wide doors are "very heavy, you can barely open them by hand without a motor lift," is this true?

Your answer made me think... the overhead garage doors might not stress the upper beam at all, since the door gives the greatest load on the steel profiles attached to the ceiling and side rails.

But to clarify a bit what I mean, I posted a small "snippet" of the garage drawing below:

http://www.ultimatesaab.com/upload/garage.JPG

 

[Bob_the_builder]

However, a substantial beam is obviously required ABOVE the doorway to support the roof......

But, if I'm not misinterpreting the drawing, the door is located on the gable end of the garage and the building has free-spanning trusses. This means that essentially there is no other load on the gable wall than that which the facade above the door imposes. The roof load is transferred to the long sides.

 

[Zeko]

But, if I am not misinterpreting the drawing, the gate is located at the gable of the garage, and the building has self-supporting trusses. This means that there is essentially no other load on the gable wall than what the facade above the gate entails. The roof's load is transferred to the long sides.

That's correct... I missed commenting on that in my
previous post.

 

[MrMagic]

And the facade on the end wall is perhaps nailed to the last/first roof truss (if the facade does not constitute the load-bearing structure) and then nothing special is needed at all. The door hangs, as mentioned, on rails that are attached to a couple of roof trusses. Additionally, a door is not particularly heavy as someone mentioned.

 

[LB]

Normally, the tracks are usually hung from the ceiling attached to the rafter. Additionally, you need a sturdy board that is nailed on the inside of the studs in the opening, like a 2"6". It will also carry some weight.

 

[M@ZE]

Zeko, what price did you get for the gate? I'm thinking of having one large 5m gate instead of 2 gates.

I remember they were quite expensive...

 

[KarlXII]

Why a wide gate?
There’s really no reason to have a five-meter gate unless you plan on making a handbrake turn into the garage...?

Just think about the cozy warmth inside that escapes like a paycheck when you open it in the winter...

 

[M@ZE]

Kalledussin:

1: the garage will not have any heating
2: you avoid the middle pillar with a large door
3: If you want a motor and remote for the door, you don’t have to buy 2 motors.

What would be the advantages of having 2 doors?

 

[Zeko]

M@ZE:
The gate is a Crawford g30 Line, I haven't checked around with many... but Beijer would charge about 19000 :- for it.
See also: http://www.arlandasnickeri.se/Downloads/PDF/Prislista-g30Line.pdf.

If you compare this with Crawford Car-in, which could be the alternative for 2 gates, I recall they were about 10000-12000 :- each.

KarlXII:
I want a large gate just because:
1. Avoid the middle post (you never know what kind of wide trailer you might buy in the future).
2. An automatic opener for one gate.
3. Nicer (at least I think so).
4. It seems it might even be cheaper.

But sure, the heat escapes in the winter. On the other hand, it might be easier to create heat considering that the wide gates are often thicker.

 

[M@ZE]

Ah ok, yes I have been in contact with Arlanda Snickeri to probably buy the entire garage kit there. Will get brochures etc. tomorrow .. will take a look through them.