A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
As building envelopes become tighter, conditions that compromise the performance of the thermal building envelope become more significant obstacles to the energy efficiency of buildings. Steel, with its high rate of heat conductivity, should be kept out of the building envelope's insulation plane as much as possible. Images from thermal cameras validate the energy loss from steel thermal bridging details. Since energy codes in the U.S. typically don't set limits for thermal steel bridging (as other countries do), it's important to relate this to a building envelope system's R-value. A straightforward way to quantify the reduction in insulation R-value due to the presence of steel elements bridging across the envelope insulation material is presented. Several conditions where thermal bridging can occur are discussed, with suggestions for alternatives to common details that can result in a significant improvement in a building's energy performance. Systems discussed include: cold formed steel stud walls, roof edge conditions, relieving angles, masonry lintels, brick ties, and projecting steel elements.
As building envelopes become tighter, conditions that compromise the performance of the thermal building envelope become more significant obstacles to the energy efficiency of buildings. Steel, with its high rate of heat conductivity, should be kept out of the building envelope's insulation plane as much as possible. Images from thermal cameras validate the energy loss from steel thermal bridging details. Since energy codes in the U.S. typically don't set limits for thermal steel bridging (as other countries do), it's important to relate this to a building envelope system's R-value. A straightforward way to quantify the reduction in insulation R-value due to the presence of steel elements bridging across the envelope insulation material is presented. Several conditions where thermal bridging can occur are discussed, with suggestions for alternatives to common details that can result in a significant improvement in a building's energy performance. Systems discussed include: cold formed steel stud walls, roof edge conditions, relieving angles, masonry lintels, brick ties, and projecting steel elements.
Envelop the Steel!
D'Aloisio, James A. (author)
Structures Congress 2010 ; 2010 ; Orlando, Florida, United States
Structures Congress 2010 ; 1373-1383
2010-05-18
Conference paper
Electronic Resource
English
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