Quantities and Pricing Modes
Understand which measurements feed cost rows and how member quantities differ from priced totals.
The Cost Table calculates quantities for each priced drawing object according to its pricing mode. It also has plant-area species rows and quantity details for supported generated members. It does not replace all objects with one net-area row per surface class, and overlapping outlines are not automatically deducted from every object’s billed area.
Check the pricing mode
Use each for individual items, a length-based mode for a measurable run or perimeter, area for a supported footprint and volume for a supported solid. Per count can use a quantity override; a lump sum is fixed rather than geometry multiplied by a unit rate. An unsupported or unavailable measurement needs attention rather than an assumed quantity.
Check length and area basis
Ordinary measurements use the object’s supported geometry. For supported objects draped over terrain, the cost calculation can use over-terrain length or surface area when terrain data is available; a plan-area readout can therefore differ. Solid volume is not increased because an object follows a slope.
Review overlaps explicitly
Do not assume drawing one surface over another subtracts the covered area from its cost row. Separate gross/net surface take-off calculations exist for surface-class analysis, but they are not the per-object pricing calculation used by the Cost Table. Model or adjust the billed scope deliberately.
Inspect generated members
Expand Members and Cut list where offered. These list quantities derived from actual supported members. The carrier object owns its cost row; generated parts are not duplicate billable rows. Member quantity details have no automatic price of their own.
Check units and completeness
Metric and imperial displays represent the same physical quantities and selling-price rates. Quantities and amounts recalculate automatically after relevant design changes, including while unit prices are locked. A manual count override takes precedence until you clear it. A lump sum remains fixed. Review unavailable measurements and unpriced rows before relying on totals. Hidden drawing objects remain in the calculation. Add allowances for work not represented by the priced scope separately.