[Equest-users] Slab extending through wall

[Byron Burns]

Hello Kevin,

 

I would recommend looking at this report prepared for ASHRAE TC4.4 by Morrison Hershfield.  They have some pretty good data which may help you out. 

 

http://www.morrisonhershfield.com/ashrae1365research/Documents/MH_1365RP_Final_%20small.pdf

 


Byron D. Burns, EIT, BEMP 
Energy Analyst/ Modeler 

H&A Architects & Engineers | www.ha-inc.com <http://www.ha-inc.com>  




From: equest-users-bounces at lists.onebuilding.org [mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of Coleman, Kevin
Sent: Monday, November 04, 2013 1:56 PM
To: equest-users at lists.onebuilding.org
Subject: [Equest-users] Slab extending through wall

 

I am evaluating a new 10-story hotel design that is proposing glass curtain walls and pre-tensioned concrete floors that project beyond the walls. On 3 sides the projections are minimal (6 inches). However, on one side, the projections extend about 3 ft. 

 

For the small projections, I intent to use the following method recommended in the thread below. "In screen 4 of 25 of the DD shell wizard you can specify "Slab Penetrates Wall Plane" (check box)."

 

I am interested in any tips for modeling the thermal impacts of the larger projections. Thoughts? (I plan to use window shading for the light/shading impacts.)

 

I am hopeful that the analysis will help convince the design team to incorporate some insulation and thermal breaks!

 

Thanks in advance!

Kevin

 

 

Brian Fountain bfountain at greensim.com 

Mon Dec 6 11:45:18 PST 2010

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In screen 4 of 25 of the DD shell wizard you can specify "Slab 

Penetrates Wall Plane" (check box).  If you do, eQUEST created a new 

wall type of height equal to your slab thickness and composed of 1' of 

concrete plus any slab edge insulation you specify on the same wiz 

screen.   That provides a parallel path for the heat transfer from the 

balcony or slab edge.  Not exactly 2D heat transfer modelling -- but at 

least you aren't ignoring the effect of the slab edge or balcony.

 

Kevin Coleman, CEM, LEED AP  ■  Project Manager ■   Nexant, Inc.  ■ Demand Management 

1232 Fourier Drive, Suite 125 ■ Madison, WI 53717 ■  608.824.1230 ■  kcoleman at nexant.com

 

P Please consider the environment before printing this email 

 

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