View source for SBS 11.3.2.2-1 Cast Iron Drains

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<big><big>Division D - Construction Details</big></big>
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<big><big><big><big><big>SBS | Cast Iron Drain ([[SBS_Roof_Systems_Standard#11.3.3.2._General_Requirements_for_Cast-iron_Roof_Drains | Article 11.3.3.2.]])</big></big></big></big></big>
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| colspan="2"  | <big>'''''Notice to Reader'''''</big>
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| style="color: black; background-color: #ffffcc; width: 100%;text-align:center" | Images used in a Construction Detail are representative and not prescriptive.  Nor are they necessarily drawn to scale. Rather, they are provided to visually convey the requirements of the Standard they represent. Unless otherwise required by the Standard, dimensions, the selection of materials and their application remains the responsibility of the ''Design Authority''.<br><br>The full text of the referenced requirements in the [[SBS Roof Systems Standard | '''Standard''']] may be read by using the <span style="color:#6495ed">'''blue hyperlinks'''</span>
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<div class="panel-heading"><big>'''SBS Details'''</big></div>
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=== WORK INCLUDED ===
;(1) [[SBS Roof Systems Standard#PART_5|'''Supporting Deck Overlay''']]: If required by design authority.
;(2) [[SBS Roof Systems Standard#PART_6|'''Air or Vapour Control Layers''']]: If required by design authority.
;(3) [[SBS Roof Systems Standard#PART_7|'''Insulation''']]: Mechanically fastened.  See available insulation products in the [[Roof Deck Insulation|'''Accepted Materials''']] section of this Manual.
;(4) [[SBS Roof Systems Standard#PART_8|'''Insulation Overlay''']]: Asphalt adhered or mechanically fastened. Two layers required over heat-sensitive insulation.
;(5) [[SBS Roof Systems Standard#PART_9|'''Primary Membrane''']] and [[SBS Roof Systems Standard#PART_9| '''Membrane Protection''']]
;(6) '''Mastic''':  As approved by manufacturer.
;(7) [[SBS Roof Systems Standard#PART_10|'''Base Membrane Flashing''']]: As approved by membrane manufacturer (See (C) below).

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=== RELATED WORK BY OTHERS ===
;(A) [[SBS Roof Systems Standard#PART_2|'''Acceptable Supporting Deck Structure''']]
;(B) [[SBS Roof Systems Standard#PART_11|'''Roof Drain Assembly''']]
;(C) '''Lead Flashing''': Minimum 15 kg / m&#178; (3 lb / ft&#178;) weight lead sheet; flange extending minimum 25 mm (1") into bowl to 150 mm (6") beyond perimeter of drain; embed in mastic (6) and prime top surface where required by manufacturer or minimum 1 m x 1 m (39" x 39") 3 mm thick modified bituminous base sheet; to be supplied by trade supplying roof drain. For optional installation methods that use a membrane flashing in place of lead, see the Application requirements under [[SBS Roof Systems Standard#PART_11|'''11.3.2.2 Cast-iron Roof Drains''']].

* Leader size is determined by using the calculation found in the BC Building Code at Appendix P.7.4.10 and Section 7.4.10.11 (Section 7.4.10.10 for gutters)(current edition) in conjunction with the 15-minute rainfall value from the National Building Code, Appendix C.
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'''NOTE''': See the [[SBS Roof Systems Standard | '''Standard''']] for additional requirements.

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