QSM202: Construction Measurement (2 of 4) Architectural and M&E Works, TMA 2, SUSS, Singapore

Question 1

Figures Q1.1 and Q1.2 show a gable roof plan with the roof rafter details.

(a) With reference to SMM clause 11.02b explain what is extreme sizes and net length. Calculate the extreme length of each rafter and the total quantities of the timber rafters required to construct the roof.

(b) Identify the relevant SMM clauses, explain and illustrate with appropriate diagrams the special considerations to keep in mind when measuring bearing timber members and plates that exceed 5.00 metres in length. Demonstrate the calculations involved with examples and give reasons for your answers.

Question 2

Figures Q2.1 to Q2.3 show the plan and sections of a hipped roof. Apply SMM rules and take-off quantities for the following works:

(a) Roof tile covering and the associated underlays.
(b) Ridge and hip capping, including the special eave courses.
(c) Structural timber including fascia boards .
(d) Eave boards including bearers.

Specifications:

• Roof tiles shall be Hugenot HP 10 clay interlocking tiles with matching ridge, hip and eave tiles and fixed to 50 x 50 mm timber battens @ 300 mm c/c with galvanized nails. Pitch of roof is at 45 degrees.
• Special tiles shall be required at ridges, hips and eaves of roof.
• Roof underlay shall comprise of two layers of bitumen felt overall 10 mm thick.
• Roof insulation shall be 50 mm thick fibre glass with double sided sisalation foil 450 and laid on fabric mesh 3325 to underside of roof covering
• All roof timber shall be keruing preserved timber
• Fascia board shall be 350 mm x 50 mm thick with halve joints for timber length exceeding 5.00 m long
• All rafters and ridge board shall be 250 x 75 mm thick with scarfed joints. Rafters shall be spaced at 600 mm c/c.
• Calcium silicate board shall be painted with 2 coats of emulsion paint

Question 3

The Architect has selected a traditional timber panelled door based on the specifications provided by a manufacturer called Longden. The approved details are circled in the following figures:

Figure Q3.1 – Door Panel Style;
Figure Q3.2 – Fire Rating Of Door Panel
Figure Q3.3 – Door Styles
Figure Q3.4 – Door Component Typical Sections
Figure Q3.5 – Door Component Dimension Table

Identify the relevant SMM clauses and explain how fire rated timber door and door frame are measured and draft a complete description of the door based on the specifications given.