Hold down bolts question
- Thread starter Gulli
- Start date
- Location
- Northumberland
Something like this
![p-2347-m16-8.8-ht-sq-sq-holding-down-bolt-nut-[2]-67662-p.jpg](https://www.speedyfixings.com/wp-content/uploads/images/products/p-2347-m16-8.8-ht-sq-sq-holding-down-bolt-nut-[2]-67662-p.jpg)
Nearly
Member
- Location
- North of York
And / or a wooden board with holes drilled in to match the plates on the bottom of the uprights.
Make sure the square washers are welded onto the heads of the bolts and you will be able to push them into the bases.
A mate didn't weld the washers on and had to abandon bolts and use resin anchor instead. Eeeek!
Make sure the square washers are welded onto the heads of the bolts and you will be able to push them into the bases.
A mate didn't weld the washers on and had to abandon bolts and use resin anchor instead. Eeeek!
- Location
- North West Wales
Plywood templates.
- Location
- East Sussex
Do they just hang there as you pour or do they need keeping plumb if they get pushed out of line?
Thanks, that's what I'm trying to ask.
- Location
- East Sussex
I thought so, those little things can make or break a job but come so naturally to those with experience.
Nearly
Member
- Location
- North of York
Get 4 bolts fastened into a plywood template.
Measure and mark centres of boards.
You've dug the holes and run strings on the mid lines of the post positions.
Pour concrete to chosen level.
Push 4 bolts into concrete so centre of board is under correct positipn on strings.
Best way is to pay a pro to do it and help them. Watch closely.
Measure and mark centres of boards.
You've dug the holes and run strings on the mid lines of the post positions.
Pour concrete to chosen level.
Push 4 bolts into concrete so centre of board is under correct positipn on strings.
Best way is to pay a pro to do it and help them. Watch closely.
- Location
- North West Wales
The way I’ve seen shed builders do it is to set out strings length and width of shed for every bay that will mark position of the bolts. The strings then position the bolts and use laser level to set them all same height. No doubt there’s an easier GPS way of doing it by now.
Edit, too slow!!
Edit, too slow!!
I've done them before but not for at least 10 years. Always used to set them and then pour but couldn't remember how to do it.
Your way sounds much simpler! Thanks
Williams agri eng
Member
Mark a cross on centre of plywood boards to align with the cross strings to get em in right place. Concrete wants to be like pee
Derky
Member
- Location
- Bucks/oxon
Plywood templates with a cross on.
String lines on every bay or profiles set up and keep moving the line.
Push the bolts into the concrete setting the levels all the same with laser level.
Place 2 block pavers on the top to stop them moving.
Or get one of us to do it that does it all the time.
String lines on every bay or profiles set up and keep moving the line.
Push the bolts into the concrete setting the levels all the same with laser level.
Place 2 block pavers on the top to stop them moving.
Or get one of us to do it that does it all the time.
Where's the fun in that?
tima
Member
- Location
- Carmarthenshire
I do this all over the country on a freelance basis with GPS. PM me if you are interested.
wasted years
Member
- Location
- Cumbrian born and bread
Looks near enough to a man on a galloping horse.
Near enough is good enough isn't it?
simon-0116
Member
- Location
- Sheffield
It is for agriculture
Fallowfield
Member
If you're wet setting them (ie pushing them into the wet concrete after the slab has been poured) make sure at the start that the steel reinforcing isn't going to be in the way.
Your other option is to put the bolts in drilled plywood templates as described and either tie them to the steel reinforcing and/or suspend them from hangers. Obviously you'd have to check the final positioning if you do it that way.
Your other option is to put the bolts in drilled plywood templates as described and either tie them to the steel reinforcing and/or suspend them from hangers. Obviously you'd have to check the final positioning if you do it that way.