Hi, I'm trying to find guidance for maximum height for stacking empty wooden and europallets. I can't see anything in HSE guidance notes, could anyone help? Cheers

I don't think there is a max height. Went to CHEP yesterday to pick up some pallets with a Driver and they stack theirs about 40 high!! It would be down to the good old risk assessment and depend on work factors, storage location, stability of ground, wind direction etc.

Is your question in relation to stability or fire risk? If one were to design the perfect bonfire it may well look like a stack of pallets and having witnessed a fire in a stack of pallets I can assure everyone that the spead of spread and heat output is exceptional. As a guide, a "normal" sprinkler installation is designed to control (not extinguish) a fire in a max stack height of just 2.1m; anything higher than that and the updraught and heat is too much for the available water. Pallets indoors present a significant fire risk and any fire risk assessment should take that in to account. External storage presents a very attaractive arson target for bored kids during the school hols. kralph's 5' storage seems good practice to me.