Slopes

Question 1

Typical minimum upward slope of a tank bottom

Answer 1

1:120

650: 5.4.4

Question 2

Minimum slope of cone roof tank (for water runoff)

Answer 2

1:16

650: 5.10.4.1

Question 3

Maximum roof slope on fixed roof tanks > 50’ diameter (if roof is considered to be frangible)

Answer 3

2:12

650: 5.10.2.6.a.1

Question 4

Taper needed for a thickened shell insert plate

Answer 4

1:4

650: 5.7.1.7
653: 9.9.4.a