---
title: Roof Drainage
…196 unchanged lines
- "10 inch"
- "12 inch"
− - "Per drawings"
−default: "Per drawings"
+default: deferred
```
…9 unchanged lines
label: Secondary (Overflow) Drainage Method
type: radio
+drawing_ref: true
options:
- "Overflow roof drains with independent piping to a conspicuous discharge"
- "Overflow scuppers through the parapet wall"
- "Combination — overflow drains at interior low points, scuppers at parapet"
− - "Per drawings"
default: "Overflow roof drains with independent piping to a conspicuous discharge"
```
…24 unchanged lines
label: Roof Drain Body Material
type: radio
+drawing_ref: true
options:
- "Cast iron with corrosion-resistant coating"
- "Cast iron with epoxy or PVC coating (corrosive or coastal environments)"
- "Cast aluminum (weight-sensitive applications)"
− - "Per drawings"
default: "Cast iron with corrosion-resistant coating"
```
…6 unchanged lines
label: Roof Drain Outlet Connection
type: radio
+drawing_ref: true
options:
- "No-hub outlet (hubless cast iron coupling connection)"
- "Inside-caulk outlet (hub-and-spigot)"
- "Threaded outlet"
− - "Per drawings"
default: "No-hub outlet (hubless cast iron coupling connection)"
```
…8 unchanged lines
label: Primary Roof Drain Dome / Strainer Type
type: select
+drawing_ref: true
options:
- "Cast iron dome strainer (low-slope roof, non-traffic)"
- "Polyethylene / polymer dome strainer (low-slope roof, non-traffic)"
- "Aluminum dome strainer (low-slope roof, non-traffic)"
- "Flat secured grate (deck, balcony, walkable surfaces)"
− - "Per drawings"
default: "Cast iron dome strainer (low-slope roof, non-traffic)"
```
…24 unchanged lines
label: Drain Deck Attachment
type: radio
+drawing_ref: true
options:
- "Underdeck clamp to structural deck"
- "Set in poured concrete roof sump"
- "Sump receiver / sump pan for tapered insulation sump"
− - "Per drawings"
default: "Underdeck clamp to structural deck"
```
…46 unchanged lines
- "To downspout boot at grade, separate from primary downspouts"
- "To a visible point above grade at a building entrance or occupied area"
− - "Per drawings"
default: "Through exterior wall to splash block at grade (conspicuous)"
```
…39 unchanged lines
label: Interior Storm Piping Material
type: radio
+drawing_ref: true
options:
- "Hubless cast iron (ASTM A888 / CISPI 301)"
- "Hub-and-spigot cast iron (ASTM A74), compression gasket joints"
- "Copper DWV (ASTM B306)"
- "PVC DWV Schedule 40 (ASTM D2665)"
− - "Per drawings"
default: "Hubless cast iron (ASTM A888 / CISPI 301)"
```
…105 unchanged lines
type: select
unit: ft on center
+drawing_ref: true
options:
- "5 ft on center, plus at each joint and coupling"
- "At each joint and coupling, plus at midspan of lengths exceeding 5 ft"
− - "Per drawings"
default: "5 ft on center, plus at each joint and coupling"
```
…3 unchanged lines
type: select
unit: ft on center
+drawing_ref: true
options:
- "4 ft on center maximum (PVC)"
- "Per pipe manufacturer for material, size, and temperature"
− - "Per drawings"
default: "4 ft on center maximum (PVC)"
```
…12 unchanged lines
label: Vertical Leader Support
type: radio
+drawing_ref: true
options:
- "Riser clamp below each floor slab"
- "Riser clamp through floor sleeve with clamping collar"
− - "Per drawings"
default: "Riser clamp below each floor slab"
```
…8 unchanged lines
label: Vertical Leader Expansion Provision
type: radio
+drawing_ref: true
options:
- "None required (cast iron, within joint and support tolerance)"
- "Expansion joint at leader base or as indicated"
- "Engineered offset / expansion loop per drawings"
− - "Per drawings"
default: "None required (cast iron, within joint and support tolerance)"
```
…16 unchanged lines
label: Condensation Insulation Extent
type: select
+drawing_ref: true
options:
- "Roof drain bodies and all horizontal conductors in occupied / conditioned spaces"
- "All storm conductors, horizontal and vertical, in occupied / conditioned spaces"
- "Roof drain bodies and sumps only"
− - "Per drawings"
default: "Roof drain bodies and all horizontal conductors in occupied / conditioned spaces"
```
…41 unchanged lines
- "1/8 inch per foot (1 percent)"
- "1/4 inch per foot (2 percent)"
− - "Per drawings"
default: "1/8 inch per foot (1 percent)"
```
…12 unchanged lines
label: Cleanout at Base of Each Leader
type: radio
+drawing_ref: true
options:
- "Required at base of every leader"
− - "Per drawings"
default: "Required at base of every leader"
```
…8 unchanged lines
label: Fire-Rated Penetration Firestop (Plastic Pipe)
type: radio
+drawing_ref: "firestop assembly drawings"
options:
- "Listed intumescent collar / wrap"
- "Listed intumescent sealant with mineral wool backer"
− - "Per UL or FM listed assembly as specified on drawings"
default: "Listed intumescent collar / wrap"
```
…111 unchanged lines
## The warranty shall not limit the Contractor's obligation to comply with all applicable code requirements and the requirements of this standard. {note}