Loft Storage timber spacing

rsbhj · 28 Jan 2021

Hi

Can anyone help me out with some advice

I have moved into a new house and looking to floor the loft using Loftleg due to the new insulation the previous owner put in this will need to be raised.

Not sure if I am looking at this wrong...see photos.

Loft leg website asks to check if the joists are 400mm or 600mm apart. Looking at my loft I am a little confused. There is the circled section in the photo 1 and distance in Photo 2, these are 1400mm apart (wimpey 1960s house).

Then there is the X section in the photos while look like ceiling supports are 500mm apart.

I would be using Loft boards that are 1220mm.

The section marked with an X to me dont look like they would handle much support, but the section marked with a circle are too far apart.

Really appreciate some advise on this.

JohnD · 28 Jan 2021

Pull back more of the insulation so you can see what's going on.

Stand back and take some wider pics to show the construction of the roof.

Also, measure the depth and width of the timbers, and their longest unsupported length.

rsbhj · 29 Jan 2021

Hi

Nipped up to take some more photos, that must be the joist I just couldnt work it out. If some kind people can have a look at let me know

P1 and P2 is left and right of the main support, these run under the main support and run horizontal across the loft. Marked with X's where I install the loft legs onto?

P3 is a close up 4" deep and 1.5"wide can see the ceiling underneath

P4 just shows the cross section

JohnD · 30 Jan 2021

Stand back and take some wider pics to show the construction of the roof.

Also, measure the depth and width of the timbers, and their longest unsupported length.

rsbhj · 30 Jan 2021

Its too much to take all the new insulation back but attached is the quick sketch of the loft.

Each horizontal beam marked with X on sketch are spaced 500mm apart. These are 100mm deep and 38mm wide (P3 in last post). These run horizontal under the verticals (P4 in last post)
Each vertical is a much larger beam width/depth, spaced 1400mm apart

Area in the middle is the area to be floored.

Does this make more sense?

JohnD · 31 Jan 2021

no, we need you to stand back and take a wide pic showing the layout of the trusses (the triangular or W shaped pieces with two sloping sides for the roof, and a flat bottom for the ceiling) along the whole loft, and to know the dimensions of the timber they are made of.

the things on the ceiling are probably just intended to hold the ceiling up, and look like they might be underneath the trusses, nailed on, rather than standing on them. If you want to use them for a floor support we need to know their dimensions too.

We need to know the maximum unsupported length because the longer they are the weaker they will be.

rsbhj · 31 Jan 2021

I've attached some more photos if this makes it any clearer? The dimensions of the beams marked with X's in the sketch and P1 and P4 are 100mm deep and 38mm wide

L1 - looking from hatch to front of House

L4 - is how they join to the beams in last sketch marked with X's
L5 - is another shot of how they join.
L10 close up of how they join

L6, L7, L8- is the opposite side towards the hatch (left to right), rear of the house

rsbhj · 2 Feb 2021

Any advise on this one?

Thanks

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Loft Storage timber spacing

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