Roofs

Roofs modeled showing overall form and primary structural geometry. Detailed roofing materials, membrane layers, insulation, and complex drainage systems are excluded. Roof slope, drainage direction, and basic construction type parameters included. Modeled to general shape and location according to plan with proper relationships to supporting walls.

Scope

Architecture (Exterior): Exterior roof elements and building envelope
Structure: Structural roof elements and framing systems

Standards

Workset Configuration

Property	Standard	Description
Workset Name	`EX_ARCH_CORESHELL`, `EX_STRUCTURE`	Assign the standard workset to roofs based on their function
System Category	Roofs	Built-in system category classification

Unit System & Measurements

Property	Standard	Description
Unit System	Imperial, Metric	Standard measurement systems
Slope	Pitch ratios	Common slopes: 4:12, 6:12, 8:12, 12:12 (Imperial)
Thickness	Standard thicknesses	Typical thicknesses: 8”, 10”, 12” for structural deck

Family & Type Configuration

Property	Standard	Description
Family Type	System	Roof families are system families built into the software
Family Naming	`<Roof Type>`	Family Name: Basic Roof, Roof by Extrusion
Type Naming	`<Construction Type> - <Thickness>`	Example: Generic - 12”, Wood Frame - 10”

Properties & Parameters

Property	Value	Description
Level Association	Host Level	Roofs should be associated with appropriate building levels
Phase	Existing	All building elements should be in Existing Phase
Material	`<By Category>` (Default)	Standard material assignment
Cut Pattern	Standard	Consistent cut pattern representation

Roof Construction Types

Construction Type	Description
Flat	Low-slope roofs with minimal pitch for drainage
Gable	Two-slope roof forming a ridge
Hip	Four-slope roof with all sides sloping
Shed	Single-slope roof
Mansard	Four-sided gambrel roof
Gambrel	Two-sided roof with two slopes on each side

Roof Configurations

Configuration	Options	Description
Construction Method	By Footprint, By Extrusion, In-Place	Method used to create roof geometry
Base Level	Level reference	Level from which roof elevation is measured
Base Offset	Height offset	Additional height above base level
Slope	Pitch value	Roof slope expressed as rise over run

Roof Functions

Function	Description
Primary	Main building roof structure
Canopy	Protective covering over entrances or areas
Parapet	Low protective wall along edge of roof
Equipment	Roof areas for mechanical equipment

Drainage & Performance

Element	Standard	Description
Drainage Direction	To perimeter or drains	Indicate primary water flow direction
Edge Conditions	Gutters, parapets, or exposed	Define roof edge treatment
Penetrations	Simplified openings	Model major roof penetrations as required