Inco
Registered User
Are over flow scuppers required with primary scuppers for roof drainage
So that is a yes.....Unless the roof will support the water until it gets over the parapet if the primary scuppers get clogged.
Me neither....But they could...
1101.7 Roof design. Roofs shall be designed for the maximum
possible depth of water that will pond thereon as determined
by the relative levels of roof deck and overflow weirs,
scuppers, edges or serviceable drains in combination with the
deflected structural elements. In determining the maximum
possible depth of water, all primary roof drainage means shall
be assumed to be blocked. The maximum possible depth of
water on the roof shall include the height of the water
required above the inlet of the secondary roof drainage means
to achieve the required flow rate of the secondary drainage
means to accommodate the design rainfall rate as required by
Section 1106.
What code book is this? Is this not to take into consideration the amount of ponding before the secondary drain starts to work?Me neither....But they could...
1101.7 Roof design. Roofs shall be designed for the maximum
possible depth of water that will pond thereon as determined
by the relative levels of roof deck and overflow weirs,
scuppers, edges or serviceable drains in combination with the
deflected structural elements. In determining the maximum
possible depth of water, all primary roof drainage means shall
be assumed to be blocked. The maximum possible depth of
water on the roof shall include the height of the water
required above the inlet of the secondary roof drainage means
to achieve the required flow rate of the secondary drainage
means to accommodate the design rainfall rate as required by
Section 1106.
Yes...But technically there is no actual limit to what that height could be other than the structural limits of the building....If the secondary drain is the roof edge....What code book is this? Is this not to take into consideration the amount of ponding before the secondary drain starts to work?