Thermal conductivity, pressed steel frame, insulated wall.

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SUMMARY

The discussion centers on the thermal conductivity differences between a one-piece continuous pressed steel frame and a two-piece frame with a thermal break in insulated wall construction. The frames are embedded in an 8" thick concrete wall with 3" layers of 3# density polystyrene insulation on each side. Participants seek to quantify the percentage change in thermal conductivity due to frame design and metal thickness, specifically comparing hot-dipped zinc-coated steel frames of varying gauges. A request for a formula and test methodology to measure these differences is also highlighted.

PREREQUISITES
  • Understanding of thermal conductivity principles
  • Familiarity with insulated concrete form (ICF) construction
  • Knowledge of material properties of pressed steel and insulation materials
  • Basic grasp of construction methodologies involving concrete and metal framing
NEXT STEPS
  • Research thermal conductivity measurement techniques for construction materials
  • Explore the impact of thermal breaks in framing systems
  • Investigate the properties of hot-dipped zinc-coated steel in thermal applications
  • Learn about the effects of metal gauge on thermal performance in building frames
USEFUL FOR

Architects, structural engineers, construction professionals, and anyone involved in optimizing thermal performance in building designs.

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Exterior commercial frames (.053") embedded in a concrete wall 8" thick with 3" layers of polystryrene (3# density) on each side of concrete cavity.

Frame rests on foam inside and outside of building. Frame is grouted solid with poured in place concrete.

Is there an appreciable (to be defined in % change) difference in the thermal conductivity of a one piece continuous frame from outside to inside of building as compared to a two piece frame that has an isolation (thermal) break along its length near the exterior of the building.

Hotly debated topic in residential and commercial ICF construction.

Formula and test methodology to confirm would be helpful.

Is the thermal conductivity in this example change by thickness of metal. is a thin metal frame any more or less conductive than a heavy gauge pressed steel frame?
 
Engineering news on Phys.org
frame is hot dipped zinc coated steel
 

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