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Differences between the NRA method of measurement and CESMM3 - Assignment Example

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Differences between the NRA method of measurement and CESMM3

Piles V. Foundations for traffic signs VI. Foundations for fences and gates VII. Tunnels, shafts, headings and other subterranean cavities. The types of excavation available are dredging, cuttings, foundations and general. Their depths also vary depending on ground material. For; I. Top soils, the depth should not be more than 0.25m. II. Firm ground to range between 0.5-1.0m. III. Any surface initially exposing hard material, a depth of 1-2m (CESSM3, 1991 p.34). NRA works on an assumption that one cubic meter of excavated material equals one cubic meter of compacted material. The measurement is done for; I. The topsoil 5A II. Cutting and other excavation III. Surcharge removal IV. Structural foundations V. Foundations for corrugated structures that are buried. The required depth is; I. 0-3 meters and II. 0-6 meters or more in steps of three (National Roads Authority 2000 p.92). 2. Class F: In-situ concrete All measurements are in cubic meters for CESMMA3 and NRA. According to CESMM3, measurements for in-situ concrete exclude; I. Capping of boreholes II. Diaphragm walls III. Excavation ancillaries IV. Granolithic and other applied finishes V. Drainage and pipework VI. Piles VII. Roads, pavings and kerbs VIII. Tunnel and shaft linings IX. Foundations for fences and gates. The concrete has different design mix. Various thicknesses are indicated in the placing of concrete. For blinding, a thickness of not greater than 150mm is allowed. The footings, bases and the like, a thickness of 150-300mm. for suspended slabs, it varies between 300-500mm and walls not to exceed 500mm (CESSM3, 1991 p.40). According to NRA, in situ concrete is measured in cubic meters without deductions for: I. The holes, ducts, pockets, sockets, mortices and the like should not exceed a volume of 0.15 cubic meters each. II. Individual chamfers, splays, rebates, recesses, drips, grooves and the like of 1000mm or less in girth must be of concrete. III. For concrete of patterned profile, indentions of 100mm or less in girth in measurement over the indentions created in concrete IV. Reinforcement V. Components cast of a maximum 0.15 cubic meters in volume. 3. Class G: Concrete Ancillaries The measurements for CESMMA3 and NRA are in square meters. CESMMA3 measurements i ...Show more

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Name: Instructor's name: Course: Date: Differences between the NRA method of measurement and CESMM3 Civil Engineering Measurement 1. Class E (Earthworks) In CESMM3, all measurements are in cubic meters and the activities include; I. Excavation II. Dredging III…
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