Major difference between CESSM3 and CESSM4 is CESSM4 has a neutral status with
regards to the Specification and Contract. It means generally there are no
particular Conditions of Contract or Specification for the CESMM4. Therefore
CESMM4 can be used with any conditions of contract and National Standard.
CESMM3
has defined “ICE Conditions of Contract” as the Conditions of Contract
(Definition 1.2). However CESSM4 hasn’t referred particular conditions of
contract. Mandatory schedule in the Preamble has introduced to fill the gap. Purpose of the schedule is to avoided any
discrepancies or ambiguities between the Conditions of Contract and Method of
measurement by identifying the relevant clauses in the schedule. For an example
refer Clause 6.4.
CESMM3 – For the purpose of clause 60 interim additions or
deductions on account of the amount ……
CESMM4 – For the purpose of interim payments additions or
deductions on account of the amount ……
Above clause 6.4 of removed the reference to ICE Conditions of
Contract and asked to identify the relevant clause nr in preamble schedule.
Generally
CESSM3 is referred to British standard (Definition 1.15) nevertheless CESSM4 is
generally in neutral status. For an example refer below additional rules A1 of
class J.
CESSM3 - The material, joint types, nominal bore and Lining
requirements of pipe fittings shall be stated in the item description and
reference given to applicable British Standard specifications and specified
qualities.
CESSM4 - The material, joint types, nominal bore and Lining
requirements of pipe fittings shall be stated in the item.
However
there are two exceptions for the rule due to impracticability of producing
BoQ’s without referring to British standards. Those are Concrete mixture and
Road construction. However if the referred British standards is not the one
relevant to the project, bill compiler should mentioned the relevant standard
in the schedule in preamble.
CESSM4- D1. Items for the provision of concrete shall be
classified in accordance with BS 8500 and (November 2006) BS EN 206-1.
If BS 8500 is not the standard relevant to a particular
project, bill compiler should mention the relevant standard in item 8 –Class F
Definition rule D1.
Also
each class has a row which hasn’t allocated for any item. Intention of this may
be to measured items where CESMM is comprehensive with the CESMM code reference
999.
Other than those key changes, there are many changes and new
items that can be notices in CESMM4. Few of those are listed below.
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