Load-bearing capacity in timber

[thorstis]

Here is more information:
* Load until it deflects enough to cause permanent damage
* Impregnerat virke 45X190 C24 I think...? http://www.byggmax.com/se-sv/prod/pid-08745195.aspx

 

[pette]

Hi, I am going to change a doorway in my 1950s stone house. Outer frame size = 100 cm. The opening will be in the foundation wall, outer wall, and load-bearing wall. The foundation wall consists of lightweight concrete blocks. Width 200 mm. I have a reinforced concrete terrace above which I think should distribute the pressure. The house is a single-story with a basement, and this is at the basement level. Do you think it's enough with two 90x90 beams side by side as a support with a bearing of 20 cm on each side? Grateful for a quick response/ p

 

[Andreas Ludde Lundell]

Hi, I'm having issues with trusses and was hoping someone here could help me?

I'm building a garage with the intention of creating an apartment on the upper floor, and I've received two prices for trusses which differ quite a bit.

The first and most expensive quote includes a 45x300 Kerto beam in both the truss and the intermediate floor.

The second quote is for a 45x220 C24 or C30 timber both in the truss and the intermediate floor.

So the question is, can a 45x220 timber suffice? The exterior dimensions of the slab are 5.4 m, the span between the walls should be 4.95 m (plus the walls which are 17 cm thick).

Anyone here who might be able to help?

 

[injonil]

No, if the trusses are also going to act as a floor structure, you will need a load-bearing wall or beam in the middle if you use "regular" timber.

 

[Andreas Ludde Lundell]

if you place double 45x220 at each rafter does it work?

how large a beam do you need then? steel beam or wood beam?
the beam length needs to be about 10 meters.

 

[biggles34]

Borrowing this thread
I am building a deck, so far dug down 19 posts at 1.5m distance. In the posts, there are 95x95 columns, in these 45x170 C14, on top of these will be 45x145 beams cc60 (assuming C14 as well?) before the decking.

How far out can I let the 45x145 beams extend beyond the last 45x170 beam without risking it sagging? 1m? 0.5m?

 

[Andreas Ludde Lundell]

Borrowing this thread
I'm building a deck, so far I've dug down 19 pillars at 1.5m intervals. In the pillars are 95x95 posts, in these 45x170 C14, on top of these will be 45x145 beams cc60 (I guess C14 too?) before the decking.

How far can I let the 45x145 beams extend beyond the last 45x170 beam without risking it sagging? 1m? 0.5m?

I did like you a few years ago but I ran 45x170 straight through and I let it extend about 150 cm from the last pillar, it became stable as ever and no sagging.

 

[biggles34]

Not a bad idea at all, actually, now that I have thought about it for a while . I probably can't change the height of one part, but the other one where I would need that piece outside, I can probably change. With about 45 sqm of decking, it might even be a bit more interesting with some separation in the form of a slight height difference, and if I make it angled, it will probably reduce the risk of people tripping, right?

 

[camaro1969]

No, if the trusses are also to act as a floor joist, you need a load-bearing wall or beam in the middle if you're using "ordinary" timber.

wrong.

I have bought trusses of 9.2 meters that can withstand a residential load of 250 kg/m2 on the "upstairs"

however, it is required that you install these at cc600

 

[camaro1969]

wrong.

I have bought roof trusses at 9.2 meters that can support a residential load of 250 kg/m2 on the "upper floor"

however, it requires that you mount them on cc600

"floor beam" in 45x245 C24

 

[f91jsw]

It sounds completely impossible to have 9.2 m floor joists with 45x245 without it becoming really wobbly. The rule of thumb is a maximum of 4 meters with 45x220 C24, cc 600.

 

[camaro1969]

I assume it's because the roof truss is, precisely a roof truss.

The free space is 4.2 or 4.4 meters in the middle of the roof truss. (I don't remember which one)

 

[Tobbe.A]

It's great when you can continue on really old threads, so here's an attempt to revive it

I'm planning to build a simpler loft in our carport, the purpose is to throw up some timber, a roof box, and other junk, nothing very heavy. The car is parked underneath, so I don't want anything to crash down

The carport is 3.3m wide, and I was thinking the loft should be 3 meters deep. Now considering dimensions. Is it sufficient to screw 45x145 C24 cc 60? The span is thus 3.3m. The floor will be made of raw planks.

//Tobbe

 

[fribygg]

Yes

 

[Tobbe.A]

Yes

Thanks! Nice that you are helping me with my different builds