You have determined that your underground cable design requires three maintenance holes (MHs). One is 4.3 m (14 ft), one is 6 m (20 ft), and one is 6.7 m (22 ft) in length. How many MH covers are required to serve these MHs?
You have determined that your underground cable design requires three maintenance holes (MHs). One is 4.3 m (14 ft), one is 6 m (20 ft), and one is 6.7 m (22 ft) in length. How many MH covers are required to serve these MHs?
To determine the number of MH covers required, note that an MH between 12 ft (3.7 m) and 20 ft (6.1 m) requires two covers, while an MH greater than 20 ft (6.1 m) needs three covers. Therefore, the 4.3 m (14 ft) MH and the 6 m (20 ft) MH both require two covers each, and the 6.7 m (22 ft) MH requires three covers. This totals to seven covers.
Pg 12-43 For an MH between 12 ft long and 20 ft. use two covers For an MH more than 20 ft. use three covers