BOQ / quantity take-off

HDAT aggregates quantities for culverts, channels, excavation/cut, and summary lines.

What HDAT quantifies (legacy categories)

• Culvert BOQ:
  • slope protection
  • riprap quantities
  • apron-related quantities (derived from culvert geometry assumptions)
• Channel/Cut BOQ:
  • excavation areas/volumes from cross-section geometry
  • liner quantity from wetted perimeter and segment length
  • roll-ups by material/size buckets
• Summary:
  • grouped dimensional totals and category totals

Engineering notes

• BOQ computations are assumption-heavy (thickness, waste factors, extents, classification of lining/protection).
• For auditability, record a “BOQ settings snapshot” (project defaults + any overrides) alongside computed quantities.