Create Rule5-42.md

docs/section5/Rule5-42.md

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+# Envelope - Rule 5-42  
+**Schema Version:** 0.0.37  
+**Mandatory Rule:** False    
+**Rule ID:** 5-42  
+
+**Rule Description:** Each linear thermal bridge and point thermal bridge as identified in Section 5.5.5 shall be modeled using either of the following techniques:  
+
+a. A separate model of the assembly within the energy simulation model.  
+b. Adjustment of the clear-field U-factor in accordance with Section A10.2.    
+
+**Rule Assertion:** B-RMR = expected value                                           
+**Appendix G Section:** Table G3.1 Section 5(a)-1 Proposed  
+**Appendix G Section Reference:** 5(a)  
+**Data Lookup:** None  
+**Evaluation Context:** Evaluate each Project   
+
+**Applicability Checks:** 
+
+1. A project has an exterior wall
+
+**Function Call:** 
+
+**Manual Check:** Ensure that linear and point thermal bridges, as identified in Section 5.5.5 are modeled using either of the following techniques:  
+a. A separate model of the assembly within the energy simulation model.  
+b. Adjustment of the clear-field U-factor in accordance with Section A10.2.      
+
+**Rule Logic:**  
+**Applicability:**  
+- look at each zone in the RMD: `for zone in P_RMD....zones:`
+    - look at each surface in the zone: `for surface in zone.surfaces:`
+    - if the surface is an exterior surface, then this rule is applicable for the entire project: `if((surface.adjacent_to == "EXTERIOR") or (surface.adjacent_to == "GROUND")): UNDETERMINED`
+- if the rule logic gets here without an UNDETERMINED outcome, then the project is not applicable: `NOT_APPLICABLE`    
+
+
+ **[Back](../_toc.md)**