RWG Contracts
Member
- Location
- Samlesbury, Lancashire
don't worry about getting bases bob on, we always set them 300 below ffl then make legs 275mm below ffl and shim them up
portal shed foundations
- Thread starter euroliner
- Start date
the reason i was going to do the floor after the pads was to get the floor level relitavly easy , we did some of our yard this way last year ...................... dug to the clay , levelled and compacted the stone / dust then lifted in two 7x4 RSJs set them in 4.8 meters apart and put a 6x4 timber each side and leveled them up , we poured the concrete and ran a power screed over the rsjs , the whole job finished with a tabletop level surface in about 20 minutes a one man job
miniconnect
Member
- Location
- Argyll
Yeah, thats how i have always seen it done, shimmed with steel offcuts of various thickness then grouted round them.
RWG Contracts
Member
- Location
- Samlesbury, Lancashire
to much, just dig a nice square with digger and fill her up with concrete
RWG Contracts
Member
- Location
- Samlesbury, Lancashire
go to a bolt suppliers and buy proper holding down bolts with wax cones, of memory m20x300
http://www.steelconstruction.info/images/thumb/3/3f/C18-11.png/500px-C18-11.png
no your shims go in the centre of your pillar so that as you tighten each corner up it pulls it that direction
O
oh right yip got yi now 4 inch square bits of flat ? something like that ? ........... and the grout . is it special or just get the concrete from your new walls in the gaps ?
RWG Contracts
Member
- Location
- Samlesbury, Lancashire
yeah any size will do, i like a washer on the top as it allows the pillar a bit more movement.
for grout you're supposed to use silica sand and cement,
I and most others just use grit sand and cement and mix it like slurry, about a 3 to 1 mix, make a bund around your pillars with sand then pour your slurry mix, fill it up over plates ideally
What about running a foundation right round the building and bolting pillars to that?
This seems to be the way that most sheds are now constructed in these parts.
If you set bolts into concrete then the supplier of shed is going to have to make sure all pillar plates are drilled the same and welded on the same.
I have seen some at different angles!
This seems to be the way that most sheds are now constructed in these parts.
If you set bolts into concrete then the supplier of shed is going to have to make sure all pillar plates are drilled the same and welded on the same.
I have seen some at different angles!
RWG Contracts
Member
- Location
- Samlesbury, Lancashire
The shed maker should make all bolt holes the same. If they can't get 4 holes in a base plate right then good luck to you when you come the 16 bolts from rafter to pillar. Any she's builder or structural engineer will draw a bolt base with bolts cast in
Not as strong as bolted on with a haunch
Grassman
Member
- Location
- Derbyshire
Il stick to electric poles. Stick em in the ground and cut off to height after!
cowmechanic
Member
Handiest way , make pads or ring foundation then get shed manufacturer to make posts correct length to keep eaves level, drill holes in pads and fix with threaded bar and resin
just drill the pads and drop the threaded bar in with the resin ?
what size of threaded bar?
Much easier to set bolts in concrete. u only have to drop post on and tighten down. The bolts are in cones which give some movement
If you drill pads you have to hold post up while you drill for bolts and then tighten down. Much slower and less secure
Steevo
Member
- Location
- Gloucestershire
Times like this I'm glad I can outsource the job! One of those jobs that's cheap to get a pro to do....and VERY expensive if you get it wrong.
Nearly
Member
- Location
- North of York
Nothing wrong with getting someone to concrete the bolts in for you. Make sure you're there to watch them do it, and you'll never need them again.
Forever Fendt
Member
- Location
- Derbyshire
makes me laugh why would you want to mess about with drilling holes and using resin to do a substandard job when you could set the bolts in the concrete and do it correct it is no more difficult
two-cylinder
Member
- Location
- Cambridge
Don't think you'll always get a perfect job if you outsource!
I moved a portal shed and found slotted make-fit holes!
I'd never done foundations before-but took my time to make sure everything was square and level and was chuffed when I was able to use the original holes!
If you're ordering a new building order it with legs long enough to mount on underground pads with cones and bolts and grout as has been said.
But in my case I was dealing with legs gassed off at ground level, so I welded on new feet, dug the holes and made four inch high frames to surround the holes, these I levelled to finish floor level. The frames enabled me to precast pads with tidy edges.