ASHRAE Journal - June 2023 - 46
TECHNICAL FEATURE
structural connection that is better than the prescriptive
requirements, it can be entered into the Appendix C calculation
or ComCheck and can be credited toward overall
envelope performance. If a project consists of a mixture
of non-compliant and compliant thermal bridges
with respect to Section 5.5, the values in the " Default "
column in Table A10.1 are to be entered as the values for
those thermal bridges that comply.
Assembly U-Factor Adjustment for Simulation of Thermal Bridges (A10.2)
For projects that wish to use the whole building performance
option, Section A10.2 permits using Section
12, " Energy Cost Budget Method, " or Appendix G,
" Performance Rating Method. " The modeling approach
allows the user to alter the conductance value assigned
to one or more insulation layers within the modeled
assembly without altering the properties of the modeled
building material layers in the performance-modeling
process.
Should the user select either modeling option, similar
rules apply as in Section 5.6 and Appendix C. The
designer would have to indicate in the energy cost budget
or performance-rating model if the applicable wall
intersections either comply or do not comply with the
prescriptive tables, and then enter either the unmitigated
or mitigated condition and quantity.
Informative Figures
Informative Appendix K, " Informative Figures-
Thermal Bridges " includes figures for the convenience
Standard 90.1 users. They are designed to provide a
graphic representation to supplement the written
description of the related thermal bridge category from
Section 5.5.5. Table 1 is an example from Appendix K of
some roof insulation above deck configurations.
References
1. ASHRAE. 2011. ASHRAE RP 1365, Thermal Performance of
Building Envelope Details for Mid- and High-Rise Buildings.
2. BC Housing. 2018. Guide to Low Thermal Energy Demand for
Large Buildings. https://tinyurl.com/33kjnnb6
3. BC Hydro Power Smart. 2021. Building Envelope Thermal
Bridging Guide. https://tinyurl.com/39h5n3vd
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46
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ASHRAE Journal - June 2023
Table of Contents for the Digital Edition of ASHRAE Journal - June 2023
Contents
ASHRAE Journal - June 2023 - Intro
ASHRAE Journal - June 2023 - Cover1
ASHRAE Journal - June 2023 - Cover2
ASHRAE Journal - June 2023 - 1
ASHRAE Journal - June 2023 - Contents
ASHRAE Journal - June 2023 - 3
ASHRAE Journal - June 2023 - 4
ASHRAE Journal - June 2023 - 5
ASHRAE Journal - June 2023 - 6
ASHRAE Journal - June 2023 - 7
ASHRAE Journal - June 2023 - 8
ASHRAE Journal - June 2023 - 9
ASHRAE Journal - June 2023 - 10
ASHRAE Journal - June 2023 - 11
ASHRAE Journal - June 2023 - 12
ASHRAE Journal - June 2023 - 13
ASHRAE Journal - June 2023 - 14
ASHRAE Journal - June 2023 - 15
ASHRAE Journal - June 2023 - 16
ASHRAE Journal - June 2023 - 17
ASHRAE Journal - June 2023 - 18
ASHRAE Journal - June 2023 - 19
ASHRAE Journal - June 2023 - 20
ASHRAE Journal - June 2023 - 21
ASHRAE Journal - June 2023 - 22
ASHRAE Journal - June 2023 - 23
ASHRAE Journal - June 2023 - 24
ASHRAE Journal - June 2023 - 25
ASHRAE Journal - June 2023 - 26
ASHRAE Journal - June 2023 - 27
ASHRAE Journal - June 2023 - 28
ASHRAE Journal - June 2023 - 29
ASHRAE Journal - June 2023 - 30
ASHRAE Journal - June 2023 - 31
ASHRAE Journal - June 2023 - 32
ASHRAE Journal - June 2023 - 33
ASHRAE Journal - June 2023 - 34
ASHRAE Journal - June 2023 - 35
ASHRAE Journal - June 2023 - 36
ASHRAE Journal - June 2023 - 37
ASHRAE Journal - June 2023 - 38
ASHRAE Journal - June 2023 - 39
ASHRAE Journal - June 2023 - 40
ASHRAE Journal - June 2023 - 41
ASHRAE Journal - June 2023 - 42
ASHRAE Journal - June 2023 - 43
ASHRAE Journal - June 2023 - 44
ASHRAE Journal - June 2023 - 45
ASHRAE Journal - June 2023 - 46
ASHRAE Journal - June 2023 - 47
ASHRAE Journal - June 2023 - 48
ASHRAE Journal - June 2023 - 49
ASHRAE Journal - June 2023 - 50
ASHRAE Journal - June 2023 - 51
ASHRAE Journal - June 2023 - 52
ASHRAE Journal - June 2023 - 53
ASHRAE Journal - June 2023 - 54
ASHRAE Journal - June 2023 - 55
ASHRAE Journal - June 2023 - 56
ASHRAE Journal - June 2023 - 57
ASHRAE Journal - June 2023 - 58
ASHRAE Journal - June 2023 - 59
ASHRAE Journal - June 2023 - 60
ASHRAE Journal - June 2023 - 61
ASHRAE Journal - June 2023 - 62
ASHRAE Journal - June 2023 - 63
ASHRAE Journal - June 2023 - 64
ASHRAE Journal - June 2023 - 65
ASHRAE Journal - June 2023 - 66
ASHRAE Journal - June 2023 - 67
ASHRAE Journal - June 2023 - 68
ASHRAE Journal - June 2023 - 69
ASHRAE Journal - June 2023 - 70
ASHRAE Journal - June 2023 - 71
ASHRAE Journal - June 2023 - 72
ASHRAE Journal - June 2023 - Cover3
ASHRAE Journal - June 2023 - Cover4
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