Material — Level 1
Material
Grade
Configuration — Level 2
struck = not fabricated in this material
Configuration
Fittings sub-library — Level 3
Insulation library — wrap & liner (seeded)
Hanger & support library (seeded)
Reserved hooks — later phases
Pressure class
Joints & reinforcement
Sealing class
Hanger schedules
Rate library (pricing / labor)
FK links reserved — Phase 1.2 / 2
Materials
4
GI · SS · BI · AL
Configurations
5
incl. Round — Welded (proposed)
Valid material × config
of 20 possible
Fitting geometries
defined once per shape family
Seed data — review & confirm
Values are standard published references (ASTM sheet weights, SMACNA ranges) and stay editable. The takeoff palette reads these records — it stores none of its own.