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ARCH TECH
LECTURE 6 INFO
| Question | Answer |
|---|---|
| What is a thermal bridge? | A deviation, weakness, or penetration in the building envelope that increases heat flow. |
| What are the main causes of thermal bridging? | Geometry, poor workmanship, and design. |
| What is the impact of thermal bridges on buildings? | Increased heat loss, reduced energy performance, and potential condensation issues. |
| Where do thermal bridges commonly occur? | Balconies, slab edges, window and door connections, and roof wall junctions. |
| How can thermal bridging be reduced? | Minimize envelope penetrations and carefully design balconies and protrusions. |
| How are thermal bridges mitigated in steel structures? | Using thermal break elements structural connections. |
| How are thermal bridges mitigated in concrete structures? | Using thermal break connectors |
| How are thermal bridges measured? | Using psi values |
| What are the units of psi? | W/(mK) |
| How are psi values determines? | Through advanced modelling |
| What is clear field transmittance? | Heat flow through uniform wall/roof areas ignores localized thermal bridges. |
| What is linear transmittance? | Additional heat flow caused by linear details through edges, corners, and transitions. |
| Why must thermal bridging be considered early? | It significantly impacts overall envelope performance. |
| What contributes to total heat floor in an assembly? | Clear field heat flow, linear thermal bridges, and point thermal bridges. |
| What is the general formula concept for total U value? | Total = (linear + point + clear field heat flow_ / total area |
| What are the steps to calculate envelope thermal performance? | 1. Identify layers 2. Calculate R values 3. Adjust for thermal bridging |
| What are architectural details? | Instructions for construction not just drawings |
| What must a detail explain? | What is built, in what order, and how the elements connect. |
| What do builders look for in details? . | Sequence, structural support, attachment methods, tolerances |
| What happens if a detail is unclear? | It slows construction |
| What is rule 1 of detailing? | Draw in the order of construction |
| What is the correct order of drawing detail? | 1. Structure 2. Substrates 3. Finishes |
| What is the second rule? | Nothing floats |
| What does nothing floats mean? | Every element must be supported and attached |
| What should you do if elements touch? | Show how they connect |
| What was rule 3? | Fixings are architecture |
| What must be shown for attachments? | How elements are fixed (screws etc.) |
| What happens if fixings arent shown? | They are assumed not to exist. |
| What is rule 4? | Scale matters |
| What is the scale used for assemblies? | 1:20 |
| What scale is used for construction logic? | 1:10 or 1:5 |
| What is rule 5? | Line weight |
| What do heavy lines represent? | Structural elements |
| What do medium lines represent? | Substrates |
| What do light lines represent? | Finishes |
| What questions should you ask when reviewing a detail? | What supports this element? How it is attached? Where is adjustment needed? What could be misinterpreted? |
Created by:
averylumgair