KS F 4005:2004 pdf download.The English title is Concrete curb-gutters and reinforced concrete curb-gutters.
This belongs to Korean standard. I have uploaded a screenshot to you. I hope this is the standard you are looking for.
1.적용범위이규격은주로노면배수용측구로사용되는콘크리트및철근콘크리트L형(이하L형이
라한다.)에대하여규정한다.
PS:Thank you for your support!