[fiano60]

Hi everyone Im new to this site and have found it brilliant  I have recently aquired the bare bones of a 10 ft x 20 ft poly tunnel just need to buy the plastic and put it up of course  the problem I have is how do I get the hoops to be square to each other so I end up with a straight polytunnel.I havnt found anywhere that can help me I remember from long ago something about string crossed anda calculation but have reached the age of forgetfulness also hoping for something less taxing.I am hoping that someone on here may be able to help  Fiona

[mumofstig]

when you measure from corner to corner the measurements have to be exactly the same, to ensure the corners are square................but that wont tell you if your hoops are in a straight line  :blink:

A piece of string from the first hoop to the last one will show if they are. Then you can do the measurement thing for each set of hoops.

[lazydog]

The old 3 4 5 rule works
http://mikelindstrom.wordpress.com/2007/01/22/getting-things-square-with-the-world-3-4-5-triangles/

[fiano60]

Thanks for your help will give it a go see what I can do  Fiona