Glulam Beam

[harrybo]

Hi,

Nearly at wall plate height so my next job is sorting out the roof. I'm building a gable ended vaulted ceiling ( room is 4.5m x 4m ). I'm looking at a 4m Glulam beam (140 x270) with 8x2 rafters 600mm apart birds mouthed and then bolted together at the ridge. Do you think 8x2 will be ok or should i go 9x2? And is c16 ok or does it need to c24? Also i'm taking a 3m load bearing internal wall out. i was going to put a rsj through but im tempted to put a glulam beam into match the one in the vaulted ceiling. Is there any calculations i can use for the size req rather than the steel rsj?

Thanks with any help as usual

ps i have no drawings or structual eng plans so i'd rather go too big

 

[noseall]

ps i have no drawings or structual eng plans

Time to speak to an SE before it's too late.

We're building something very similar and the SE has worked out that the GF openings lintel needs to be a structural steel affair simply because of the additional loading on the gable end due to the ridge beam loading.

How have you gone about it thus far? Guess work?

 

[harrybo]

No guess work so far but its never too late! All gone ok so far bar the wall tie spacing which was easily rectified with help from a few on here. I feel fairly confident with the roof just wanted peoples views if it sounded right. I might have to get a structural engineer for the interior beam as i feel less confident about that one

Cheers

 

[noseall]

No guess work so far but its never too late! All gone ok so far bar the wall tie spacing which was easily rectified with help from a few on here. I feel fairly confident with the roof just wanted peoples views if it sounded right. I might have to get a structural engineer for the interior beam as i feel less confident about that one

Cheers

Are you qualified to prove any of the structural elements?

 

[harrybo]

No but had my 3 year old lad out testing it with his plastic hammer he thinks I've done a cracking job
Bc been out and they're more than happy so far told him my plans for the roof which he said should be fine. Just a bit unsure now if i should go with c16 or c24 timber

 

[noseall]

Bc been out and they're more than happy so far told him my plans for the roof which he said should be fine.

And when the sign off time arrives and they kindly ask you for calc's what then? At some point, you are likely to be asked for calculations to prove your beams so why not get them before rather than after?

 

[bernardgreen]

testing it with his plastic hammer he thinks I've done a cracking job

As long as only the job is cracking and not the beam in a few months time.

 

[harrybo]

Haha, that beam will be fine as it's only the ridge for the rafters to lean on

 

[bernardgreen]

Haha, that beam will be fine as it's only the ridge for the rafters to lean on

and the rafters carry the weight of the roof. The beam will have to support that weight.

 

[harrybo]

Original plan was to have a ridge board so a 140x270 glulam should be more than man enough.....if not keep your eye on the diy disasters forum!!

 

[noseall]

Original plan was to have a ridge board

What plan, what ridge-board?
A ridge board and a ridge beam are completely different.

ps i have no drawings or structual eng plans so i'd rather go too big

 

[harrybo]

Sorry original "idea"