Each subcommittee meets monthly and discusses and makes recommendations to the full committee concerning changes submitted as well as other issues related to their focus. Specifications focuses on Part 1. New Materials-Underground focuses on underground materials and methods of construction in Parts 2, 3 and 5.
New Materials Surface focuses on surface materials and methods of construction found in Parts 2, 3, 4, and 6. Special Provisions Guide focuses on provisions in the Greenbook which require specificity, choice, or additional information to be contained in the contract-specific special provisions as well as the format and structure of the special provisions. All rights reserved. UFGS 01 86 UFGS 01 91 Division 02 - Existing Conditions. UFGS 02 53 UFGS 02 54 UFGS 02 56 UFGS 02 62 Division 03 - Concrete.
UFGS 03 37 13 Shotcrete. UFGS 03 41 UFGS 03 42 UFGS 03 52 Division 04 - Masonry. UFGS 04 01 Division 05 - Metals. UFGS 05 05 UFGS 05 14 In order to determine the number of credits awarded, the calculator tool looks at the elements U value before refurbishment and plots available credits on an exponential curve with maximum credits available for achieving the best practice U values.
The same number of credits area available irrespective of the elements starting U value with credits redistributed depending upon its starting point before refurbishment.
This is in order for the method to assess what impact the new materials are having on improving operational performance. The exponential basis recognises the increasing cost of improving existing elements towards the upper U value limits.
Whilst it is recognised that it is technically feasible to go beyond the upper U value levels e. Passivhaus , the above limits have currently been set for the purposes of this issue considering current best practice refurbishment that may be achieved across a range of house types..
BRE Global will review this as the scheme is operational and as best practice moves on, this upper limit will potentially be updated when BRE Global carry out an updates of the scheme, with the first update programmed following first year of the scheme operation. For refurbishments that go beyond these U values, additional credits may however be achieved in the energy category including Ene 01, Ene 02 and Ene Where an element consists of several different specifications, the overall credits achieved for that element are weighted according to the relative area and Green Guide rating of each of the individual specifications.
An example of this is provided below for an external wall element consisting of three different types of external wall specification.
Table - Example wall elements. This adjustment is made to ensure the contribution of credits is balanced in accordance with the life cycle performance of each specification. Part 1: Weights the performance of the building elements based on its area relative to the overall area of the different elements.
This is done by multiplying the area of each element by the weighted Green Guide score, adding the total for all elements and then dividing by the total area of the assessed elements. For example, a 3-storey house will have a smaller roof area than external wall area, and so the area weighting will take this into account by giving a smaller weighting to the credits score for the roof in comparison to the external walls.
Part 2: The range of impacts, measured using Ecopoints, for each of the elements will differ and therefore so will the increments between each Green Guide rating level. For example, the external walls have a larger Ecopoints range than the internal walls, therefore, if both elements achieve the same Green Guide rating, the rating of the external walls achieves a higher proportion of the overall points than the rating for the internal walls, thus recognising the relatively higher reduction possible in the environmental impact of the external walls, due to the larger Ecopoints range for that element.
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