Sub-base not exceed 37.5mm in size

[jimbob]

I've read the articles on sub-bases and see that it states that Type 1 Sub-Base stones/solids should not exceed 37.5mm in size. I presume that is in any direction?

i.e if a stone is 45mm in one direction and 5 mm in another it still shouldn't be in Type 1 grade?

Probably a numpty question but if you don't ask you don't know! Ta.

[dig dug dan]

yes it should, as it is whatever passes through a specific size screen.
Obviously if you had a 50mm x 50mm hole, then a piece say 40mm by 40mm by 100 cold fit through lengthways!

[lutonlagerlout]

if you are laying say 100 m subbase then if the pieces are too big you end up with voids
as DDD correctly says they may be bigger 1 way but they will have passed through a screen at the recommended size
what makes you ask this ?
LLL

[jimbob]

Thanks DDD - I should have thought about that one logically!!

...what makes you ask this ?
LLL

Thanks LLL, just checking "what I'm being told" and trying to make sure job is done right ???

Talking of which just posted another query so hopefully you can help.

Thanks again!

ps this is a great site - so much info!!