Beam Size

[srohara]

Hi all

I am wanting to replace a beam in the roof that covers my existing deck, i want to put in a beam that has a biggest possible span as i really dont want many supports. Preferably 1 post at each end. I just dont know what size beam to use.

The length of the roof is 4400mm,
width to the beam 2000mm
Total width of roof 2300mm
All the frame is 100 x 50mm Hardwood

Want to span 4400mm. Can anyone suggest a beam size and span length.

Regards
Scott

[Pulse]

Photo would be great, framing manuals talk about Roof load width and rafter span and spacing etc..

Sometimes a photo is the best way to know we are all talking about the same things

Cheers
Pulse

[srohara]

Here are some pics of the roof

[glock40sw]

G'day.
I just ran your dimensions through the "Timber Solutions" Span software.
It shows a 125x38 unseasoned hardwood beam will do the job.This is to support a roof and ceiling. A post at each end with 1 in the centre.

Beam span to be 2200mm between posts.

Hope this helps.

[srohara]

Would i be able to use an LVL or I beam. how would they go semi exposed to the weather, or would the hardwood be best

[glock40sw]

No. The span of 2200mm between the posts will not allow it.

I Beams cannot be used for verandah heads.

I tried Gluelam 8 beam and it showed a 165x80mm would be needed.

Stick to Hardwood

[pawnhead]

According to this span table, a 320x65 GL8 will do that span in one go.

That's a big/heavy/expensive stick of timber though.

[srohara]

Could i get away with using a 145x45 tp or a 190x45tp ans span 2200mm

[silentC]

A 120x45 in F5 or F7 will span 2400 with a 1000 1/2 rafter span, which is what you've got, but you're right on the edge, so going up to 140x45 would be a good idea.

If you want to span the full width, an open web girder (can you even still get them? ) or a universal beam would do it but would be pricey.

[pawnhead]

You generally can't get 120x45 off the rack, so they'd probably be ripping down a 140 and charging you even more for the time involved.

[srohara]

What size LVL or GL beam could i use to span 4400mm

[silentC]

http://www.chhfuturebuild.com/upload...bles_Mch06.pdf

[pharmaboy2]

hi, just stuck a 4400 beam, 600mm rafter spacings, 1.3m roof load width for verandah beam - supporting ceiling into hynes deign prog and got 200/45 LGL or 170/65 LGL to span that. It can be ordered in H3 treatment

[Pulse]

Smorgon LiteSteel Beam LSB might help. They are light, and easier to work with than rolled steel sections.

Cheers
Pulse

[srohara]

Ended up using a 240 x 63 LVL and encasing it in blue board