[email protected] Research Institute for the Built and Human Environment Do ontological...
8
[email protected] Research Institute for the Built and Human Environment Do ontological assumptions affect managerial and professional reasoning? Some ethnographic evidence. [email protected]
-
Upload
gillian-hampton -
Category
Documents
-
view
219 -
download
3
Transcript of [email protected] Research Institute for the Built and Human Environment Do ontological...
Research Institute for the Built and Human Environment
Do ontological assumptions affect
managerial and professional reasoning?
Some ethnographic evidence.
Research Institute for the Built and Human Environment
What is a radical conceptual change?
“for students to really understand what forces, light, heat, and current are, they need to change their conception that these entities are substances, and conceive of them as a kind of constraint-based event”
Chi 1992 pp140-141http://www.pitt.edu/~chi/papers/Chi1992.pdf
Research Institute for the Built and Human Environment
Civil Engineering Standard
Method of Measurement
(CESMM)
The object of CESMM is to set forth the procedure
according to which the Bill of Quantities shall be
prepared and priced and the quantities of work
expressed and measured.
Institute of Civil Engineers
http://www.ice.org.uk/knowledge/contracts_cesmm.asp
Research Institute for the Built and Human Environment
The objects of the Bill of
Quantities * a. to provide such information of the
quantities of work as to enable tenders to be
prepared efficiently and accurately
* b. when a contract has been entered into, to
provide for use of the priced Bill of Quantities in
the valuation of work executed.
Institute of Civil Engineers
http://www.ice.org.uk/knowledge/contracts_cesmm.asp
Research Institute for the Built and Human Environment
Example of a CESMM analysis:
Class F.1-4, provision of in situ concrete● FIRST DIVISION: standard, designed, or
prescribed mix
● SECOND DIVISION: for provision of standard or designed mixes, state strength; for provision of prescribed mix, state proportions of each constituent.
● THIRD DIVISION: type of cement and nominal maximum size of aggregate.
Research Institute for the Built and Human Environment
Example of a CESMM analysis:
Class F.5-7, placing of in situ concrete● DIVISION ONE: mass, reinforced or
prestressed● DIVISION TWO: (1) blinding; (2) bases
etc.; (3) suspended slabs; (4) walls; (5) columns and piers; (6) beams; (7) casing; (8) other
● DIVISION THREE: (*.1-4) state thickness; (*.5-7) state cross sectional area (*.*.1-5) or ‘special beam sections’ (*.*.6)
Research Institute for the Built and Human Environment
Planning for Time
The following time periods are required by theStatutory Undertakers
StatutoryUndertakers
Notice forStart-on-Site
Cable/PipeLaying & joints
Water Company 6 weeks 8 weeks
Electric Company 6 weeks 8 weeksGas Company 6 weeks 8 weeks
Phone Company 6 weeks 8 weeks
The above times for cable laying and jointing arebased on one gang working and its given a free accessto the whole of their works.
Research Institute for the Built and Human Environment
Consequences
● ICE Contract, 5th edition, Clause 14: the Contractor is required to supply a programme for the work, within twenty-one days of their tender being accepted.
● In this programme, the Contractor had allotted eight weeks during which all four of the statutory undertakers were expected to perform their work simultaneously and specified how this work would be co-ordinated.
● The Resident Engineer responded that the Clause Fourteen programme was unrealistic and the matter remained unresolved.
● When an initial 6 week delay upset this programmed work, the Contractor claimed for a 17 week delay.
