Raised Beds

Hi all, this is my first thread! i've had a browse around and cant seem to see anything on raised beds, maybe im just missing the thread so if anyone can direct me that would be great! if not...

I'd like to create some raised beds in the garden for the usual root veg and maybe some beans etc. but was wonderign what the best (and preferably cheapest) material to use would be, i've heard railway sleepers are great but old ones can also leach nasty chemicals into the soil, i guess the other option is wood but am not sure which type is best suited for raised beds and where to source this from and with what to connect the pieces together

any help on this would be greatly appreciated...

cheers

 

Many thanks John, i knew there must be a thread out there somewhere!
:gnthb: