Joinery, Carpentry, Ironmongery and Metalwork Measurement
This domain tests description quality as much as arithmetic. A door measured as '1 nr door' earns almost nothing; a door described by size, leaf thickness, material and grade, glazing, finish, frame and ironmongery earns the marks.
Descriptions and units
- Carpentry: linear m for studs, joists, framing and plates with the cross-section stated; m² for boarding and decking; nr for trusses or scheduled members.
- Doors and windows are enumerated and described by overall size, leaf thickness, material and grade, glazing, finish and associated frame.
- Ironmongery is enumerated and scheduled per door type. It is either measured separately from the leaf or included by description - the method must say which, and the two must not overlap.
Metalwork
- Structural steel in t, with fabrication, shot blasting, priming, painting and erection described or measured separately under painting.
- General metalwork such as balustrades, ladders and frames is measured in m or nr, or by mass in kg for small fabricated items.
Worked example
12 nr internal doors 900 × 2100 mm, 40 mm flush hardwood leaf, softwood frame, ironmongery per door of 3 hinges, 1 latch and 1 lever set. Door leaves = 12 nr. Frames = 12 nr, or 12 × 5.400 m = 64.800 m if the method measures frames linearly. Hinges = 12 × 3 = 36 nr; latches = 12 nr; lever sets = 12 nr. The door is one enumerated item; ironmongery multiplies per leaf; the frame is a separate item where the method requires it. Painting the leaf is a separate item under decoration unless expressly included.
Traps that cost marks
- Describing a door without grade, thickness or finish, leaving the rate unpriceable.
- Counting ironmongery once for the whole door set instead of per leaf.
- Measuring steel in kg when the method requires t.
- Forgetting to state whether painting or priming is included in the metalwork rate.
- Omitting the frame because the door leaf was measured.