My husband said these are really easy to assemble.  He used lag bolt, a wrench, green treated lumber and a circular saw and had these put together in no time.  We made 4 sets of racks each with 16 foot length boards for the bottoms and one bracket each end of the board and one half way for the mid support upright board.  They will certainly be easy to move around when the wood is used up so we can clean under them and I really like how the wood is not on the ground. One reviewer wrote that the pieces were a little larger than the lumber causing them to shim the wood but we didn't have this situation and infact we needed to slightly shave one piece of wood to get it to fit.  Otherwise, the wood fit nicely.  I would say this metal is perfectly heavy duty for this project and appears to be well coated for the elements.  You didn't ask but Yes, I would recommend this to a friend!  :)