strength of timber
 

Fwom:Zipadee Doodar )

Since your 'Local authority planning officer' recommended
'doubling up'
presumably he also suggested some method of attachment. Can you say
what
method of attachment he suggested, if any?

Using PVA glue to BS 4051 with screws driven through at 6 inch
distance -
for storage purposes only remember. We are not talking a full scale
loft
conversion here.


Thats the standard method. I would not consider countersinking, you
need to use screws meaty enough for the job, not tiddlers lost in big
holes and wood like swiss cheese.

But.... whats your existing joist size? Very few houses have joists so
weak you cant use them for box storage as is. There's a fair bit of
miswhatnot about this subject.


NT

"N. Thornton" wrote in message
om...
Fwom:Zipadee Doodar )

Since your 'Local authority planning officer' recommended
'doubling up'
presumably he also suggested some method of attachment. Can you say
what
method of attachment he suggested, if any?

Using PVA glue to BS 4051 with screws driven through at 6 inch
distance -
for storage purposes only remember. We are not talking a full scale
loft
conversion here.


Thats the standard method. I would not consider countersinking, you
need to use screws meaty enough for the job, not tiddlers lost in big
holes and wood like swiss cheese.

But.... whats your existing joist size? Very few houses have joists so
weak you cant use them for box storage as is. There's a fair bit of
miswhatnot about this subject.


NT
The existing joists are 2.75 x 1.25 inches, but I would prefer to err on the
side of caution - son's video collection of 'classics' (crap repeated every
2 days on cable) is extensive, and can be heavy if concentrated in small
areas.

BTW, what would you consider to be meaty screws in this sort of application?
I have abandoned any idea of countersinking - only considered it because I
have a seemingly inexhaustable supply of 4 inch x 8s. I want to start the
job before the local spiders wake up and begin clog dancing across the
loft.......

Does it not depend on a) how close together the beams are b) if they're
triangulated into the complete roof structure, c) what kind of
unsupported distance they have to span?

wrote in message
oups.com...
Does it not depend on a) how close together the beams are b) if they're
triangulated into the complete roof structure, c) what kind of
unsupported distance they have to span?


Within limits but I think I could just about snap 2.75 x 1.25 with my hands.

"Mike" wrote in message
...

wrote in message
oups.com...
Does it not depend on a) how close together the beams are b) if they're
triangulated into the complete roof structure, c) what kind of
unsupported distance they have to span?


Within limits but I think I could just about snap 2.75 x 1.25 with my
hands.


Same here. I would most definitely try to lay more robust joists between
the existing ones, before I laid any boards to walk or store tings on. No
matter how you try to strengthen these joists, you'll still have parts of
the load over just one or two at a time, which isn't really a nice thought.

Within limits but I think I could just about snap 2.75 x 1.25 with my
hands.


Same here. ....

I bet they drink Carling Black label!!