คอนกรีตและวัสดุก่อสร้าง
เอกสารมาตรฐาน
สหรัฐอเมริกา
AASHTO
M 207M/M 207-22
Reinforced Concrete Elliptical Culvert, Storm Drain, and Sewer Pipe
2022
20
HM42-2022 part 1
This specification covers reinforced elliptically shaped concrete pipe to be used for the conveyance of sewage, industrial wastes, and storm water, and for the construction of culverts. Pipe designed for placement with the major axis horizontal shall be designated as “horizontal elliptical pipe.” Pipe designed for placement with the major axis vertical shall be designated as “vertical elliptical pipe.”