Pancyprian TS Qty Measurement flashcards
Pancyprian TS Qty Measurement · Build recall with a focused review session.
31 cards. Read the term and the definition here. The deck at the top of this page is optional.
- Net measurement principle
- Quantities are measured as the finished work fixed in place, without allowance for waste, unless a specific SMM rule states otherwise. Excavation is the exception, measured in situ.
- Dimension order convention
- Dimensions are written length × width × depth. Three dimensions give volume, two give area, one gives length. Timesing multipliers are written before the dimension set.
- Deduction threshold rule
- Openings and voids below a stated area (commonly 0.5 m² for finishes) are not deducted; above the threshold they are deducted and the surrounding work described. The threshold comes from the SMM clause.
- Centre line method
- A taking-off method for continuous strip footings and walls where the centre line length is measured once and multiplied by width and depth; junctions are adjusted to avoid double counting.
- Coverage rules
- SMM rules stating what a measured item is deemed to include, so included work is not remeasured. They sit after general, measurement and definition rules in the SMM hierarchy.
- Provisional sum vs PC sum
- A provisional sum allows for work that cannot be detailed at tender. A prime cost sum allows for a named supplier's goods, with a separate fixing item measured.
- Bar schedule mass formula
- Reinforcement mass per metre equals d²/162 kg/m for bar diameter d in mm, equivalent to 0.006165 × d². Total mass is length × number × mass per metre.
- Approximate quantities bill
- An early-stage bill measured loosely for cost planning. It must state that quantities are approximate and subject to remeasurement, and is not a firm contract basis.
- Working space allowance
- A defined SMM allowance for space needed in front of and around foundations for formwork and compaction. It is measured separately and is not part of net excavation.
- Bulking factor
- The ratio of loose excavated volume to in situ volume, used when measuring disposal. Disposal is measured in m³ of loose material, so the in situ volume is multiplied by the factor.
- Earthwork support measurement
- Planking and strutting is measured as m² of supported face or as an item, with depth and whether left in stated. It is separate from the excavation volume.
- Dewatering measurement
- Measured as an item by duration in weeks, with pumping capacity and disposal point stated. It is not included in the excavation rate and is priced separately.
- Concrete measured net
- Concrete is measured in m³ as fixed, excluding formwork and reinforcement. Grade, aggregate size, cement type and placement method are stated in the description.
- Formwork contact area
- Formwork is measured in m² of the surface in contact with concrete, classified by soffit, sides, edges, risers, slope and height above floor level.
- Fabric reinforcement measurement
- Measured in m² with the mesh designation (e.g. A142) and number of layers; laps are allowed for per the SMM rule and stated in the description.
- Movement joint measurement
- Joints are measured in m with the joint width, sealant type and location stated. Waterstops are measured in m as separate items.
- Wall area measurement
- Masonry walls are measured in m² of face area with thickness, unit type, strength and mortar mix stated. Openings above the SMM threshold are deducted.
- DPC and DPM measurement
- Damp-proof courses are measured in m of wall length with width stated. Damp-proof membranes under slabs are measured in m² with laps allowed for.
- Rendering coats description
- Rendering and plastering are measured in m² of finished surface with number of coats, mix and thickness stated. Internal and external work are separate items.
- Sloping roof area conversion
- Roof coverings are measured on the slope. Plan area is converted by dividing by the cosine of the pitch angle; ridges, hips and valleys are measured in m.
- Waterproofing membrane measurement
- Measured in m² with laps and upstands either included or measured separately. The membrane type and number of layers are stated in the description.
- Thermal insulation measurement
- Insulation is measured in m² with thickness and thermal conductivity stated. The target U-value belongs in the specification, not the bill description.
- Door and ironmongery measurement
- Doors are measured by number with type, size, material and finish. Ironmongery is either included in the door item or listed separately by number and finish.
- Structural steelwork measurement
- Measured by mass in kg or tonnes with section sizes, grade and protection (painted, galvanised, fire-protected) stated. Connections and fittings are described.
- Suspended ceiling measurement
- Measured in m² with grid system, tile type and suspension depth stated. Edge trims and access panels are measured as separate items.
- Skirting and trim measurement
- Skirtings, architraves, dado rails and covings are measured in m with the profile and material stated, separate from the wall or floor finish area.
- Pipework measurement rule
- Pipework is measured in m with material, diameter, jointing method and above/below ground stated. Fittings are measured by number or included per the SMM rule.
- Below-ground drainage measurement
- Pipes are measured in m with depth range and bedding or surround described. Manholes and inspection chambers are measured by number with depth and type.
- Cable containment measurement
- Conduit, trunking and tray are measured in m with size, material and fixing stated. Bends and fittings are measured by number or included per the SMM rule.
- Testing and commissioning item
- Measured as an item or sum with the scope and certification stated. It is not included in the pipework or cable rate and is priced separately.
- Preliminaries vs measured works
- Preliminaries cover site establishment, management, temporary works and insurance, priced as lump sum or time-related items. They are not measured works and sit at the front of the bill.