(1)
No change in the nominal pipe size of a leader with a nominally horizontal offset is required if the offset
(a)
is located immediately under the roof,
(b)
is not more than 6 m long, and
(c)
has a slope of not less than 1 in 50.
(2)
If the horizontal offset is more than 6 m long, the leader shall conform to Table 7.4.10.9.