Need help finding thermal info from your project's Architectural Specifications? It's typically listed in Division 7 under Thermal Insulation or Rainscreen Attachment/Support Framing System.
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Energy Code Requirements
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2
Project Design Information
This information can be found in the general notes section of the project's structural drawings or specifications.
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3
Assembly Filters
6"
97mils (12ga)
16" o.c.
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Maximum cladding dead load (psf) that can be handled by this system, limited by the calculated or tested load that results in 0.125 in. deflection.
Wind loads indicated in result tables were calculated/generated using Allowable Stress Design (ASD).
The structural analysis assumes that the horizontal and vertical distances between fasteners are equal to the area of cladding contributing to the loading of two screws for horizontally aligned ProChannel Ci system.
The structural analysis assumes that the exterior insulation is self-supported such that its weight does not bear upon the ProChannel or fasteners.
The Grip-Deck TubeSeal® Fasteners were analyzed as a cantilevered beam with flexible rotation restraint from substrates and zero rotation restraint from the ProChannel Ci. The cantilevered length was measured from the outside surface of the ProChannel Ci to the outside surface of the substrate.
ProChannel Ci must not cantilever past the continuous insulation.
To use this table correctly, the ProChannel Ci must be loaded uniformly both in terms of dead load and wind/seismic load.
It is the responsibility of the design professional to detail the project drawings for proper ProChannel Ci installation.
The structural analysis is based on exterior insulation with a minimum compressive strength of 439 psf at a 10% compression per ASTM C165 or equal.
Thermal Notes
For horizontally installed ProChannel Ci, include two fasteners at the outer flanges of the channel which are approximately 3-1/2 inch apart.
The thermal performance of the wall assemblies was evaluated by Stantec using 3D thermal simulations.
The thermal solver and modeling procedures utilized for this study were extensively calibrated and validated to within +/- 5% of hotbox testing for ASHRAE Research Project Report RP-1365.
Thermal values shown with an asterisk (*) are interpolated.
Thermal values shown for 48" vertical fastener spacing are based on 36" vertical fastener spacing.
Thermal values shown for 32"& 48" horizontal fastener spacing are based on 24" horizontal fastener spacing.
Large, enclosed air spaces greater than 1/2 inch in depth, such as stud cavities, were simulated with an equivalent thermal conductivity of the air that includes the impacts of convection and radiation within the enclosure. Calculations for this equivalent conductivity were based on 2017 ASHRAE Handbook - Fundamentals.
Interior/exterior air films were taken from 2017 ASHRAE Handbook – Fundamentals depending on surface orientation. The exterior air films were based on an exterior wind speed of 15 mph.
Contact resistance between materials were simulated following procedures outlined in ASHRAE Research Project Report RP-1365.
Insulation and other components were considered tight to adjacent interfaces.
The clear field transmittances included in this analysis include repeating thermal bridges such as studs, girts, and fasteners.
The wall assemblies were evaluated over a temperature index, for full limitations of this modeling approach, see ASHRAE Research Project Report RP-1365.
