Roof Drainage
Datasheet constraints: every range, checkbox and listbox field now states its direction
Showing changes from Rev 7
to Rev 8
in Roof Drainage.
---
title: Roof Drainage
…105 unchanged lines
- "Siphonic system design"
- "Controlled-flow weir settings and metered discharge rates"
+constraint: all_of
```
…17 unchanged lines
- "Thermal movement calculation"
- "Heat fusion joining qualification records"
+constraint: all_of
```
…15 unchanged lines
- "Assigned manufacturer warranties"
- "Maintenance instructions"
+constraint: all_of
```
…88 unchanged lines
```datasheet
−label: Minimum Horizontal Storm Pipe Slope
+label: Horizontal Storm Pipe Slope
type: range
unit: in/ft
…2 unchanged lines
setpoints: [0.0625, 0.125, 0.25, 0.5]
default: 0.125
+constraint: min
```
…154 unchanged lines
- "Deck plate for a wood deck"
- "Underdeck insulation shield"
+constraint: all_of
```
…63 unchanged lines
- "Overflow scuppers through the parapet or perimeter wall"
- "Free-draining roof edge with no construction above the roof surface"
+constraint: all_of
```
…20 unchanged lines
setpoints: [2, 2.5, 3, 4, 6]
default: 2
+constraint: exact
```
…37 unchanged lines
setpoints: [2, 2.5, 3, 4, 6]
default: 2
+constraint: exact
```
…3 unchanged lines
```datasheet
−label: Overflow Scupper Minimum Clear Opening Height
+label: Overflow Scupper Clear Opening Height
type: range
unit: in
…2 unchanged lines
setpoints: [4, 6, 8, 10, 12]
default: 4
+constraint: min
```
…489 unchanged lines
setpoints: [1, 2, 3, 5]
default: 1
+constraint: min
```
…29 unchanged lines
- "Clamping ring bolt sets"
- "Vandal-resistant dome removal keys"
+constraint: all_of
```
## The dome is the part of a roof drain that is lost: it is lifted off for cleaning and not replaced, or it is broken by a dropped tool, and a drain without its dome passes gravel into the leader at the next storm, so the spare on the shelf is what keeps the leader clear until a replacement is ordered. {note}