Why? How would you put you post caps on then?

Why?

lift the string in the middle because it will bow especually over 25 meters

You seem really knowledgeable about fences. Are these metal fences sturdy in the wind?? or do they rattle around?

You might have your terminology confused.... Cement is a binding agent /powder that is mixed with Aggregate (gravel of different screen sizes) and Sand to make Concrete. Typical concrete mix varies in strength..... based on ratios of gravel, sand, cement such as 4, 2, 1. If you want a bit stronger concrete than use 3, 2, 1 or add a little bit more cement. The idea of concrete is it gets its strength from filling up the air spaces between the gravel with sand and then binding it together with cement powder. Good concrete ideally contains 20mm and 10 mm Gravel...Washed beach or river sand, and cement powder...... Commercial concrete substitutes some of the sand with a stuff called Fly Ash..... it is ash left over from burning coal at coal fueled power stations..... the fly ash dust is nearly as bad as asbestos. I don't know much about quick set concrete it probably is very similar to the epoxy mixes were used to use in highrise construction to secure the tower crane bolts in the floors. ...... You don't really need to make wet concrete for these posts..... a lot of people use a dry mix.... or a reasonably 'dry' wet mix ( it contains a lot less water). The advantage of a dry mix is it is much easier to stand the posts and get them plumb and at the right height. Using dry mix...... lightly wet the post hole beforehand....... insert the post and pack down (tamp down) the dry mix around it. Add the dry mix in 2 or 3 layers so it tamps down better.... the advantage with this method is to plumb the post....... tamp down one side of the hole or the other a bit harder to move the post into plumb..... The posts should be at the right interval and plumb on both the front face and one side face or the post. Then you can either brace your posts, or just don't touch them overnight while the moisture in the ground sets off the concrete..... or you can tip a bit of water into the post hole to help it set overnight...... Once you have the posts set..... check then for height / plumb..... make sure they are right..... and then leave them to set..... don't play around with them too much.

Nz I think

@@embatbr not as precise but simpler

Metal craft New Zealand wide

gul khan god no,

The hot grindings stick to the powder coat and rust very quickly. It's something you only do once.

Yeah a bit high

I have been looking for a while and haven't seen anything. I bet we'll just have to buy from a company that sells aluminum or steel corrugated parts.

We have this fence in Canada

You need bullet proof fences there

Bluescope australia

It is wrong there’s a much better way to do it!

You can get the stop end up to 90 degrees