On Tue, 20 May 2008 07:11:46 -0700 (PDT) RobertL wrote :
Under the house the gap between the earth to underside of each joist
is about 50cm. This is too big for a car scissor jack - I had
imagined using a row of scissor jacks. It's too small for an ACROW
prop.
You want trench props.
http://www.toptower.co.uk/builders_props.htm was
the first source thrown up by Google but there may be cheaper options.
As you only want to use them the once, a hire shop might sell some used
ones.
--
Tony Bryer SDA UK 'Software to build on'
http://www.sda.co.uk