Hello all

A bit of advice on possibly decking over a ditch at gthe end of my
garden.

The ditch is 4.3m back to front, that gets me on a decent bit of
ground to put any foundations in. The length of ditch i want to deck
is 15m.

Now I'm more than capable of digging holes, pouring concrete, cutting
josts and laying decking, but I have no idea on the size of joists I
need for that kind of span and number of joists.

Advice anyone?

Many thanks

Steven