vault backup: 2025-10-24

pre-takeoff-research.md

@@ -6,26 +6,33 @@ tags:
   - occupational
   - status/incomplete
   - type/guide
+  - authorship/original
 title: Pre-Takeoff Research
 ---
 # Pre-Takeoff Research
 
-## Requirement Precedence
+<!--
+This note should be arranged chronologically:
+-->
 
-In case of conflict:
-
-Requirements of the plans and specs
-are superseded by the terms of our proposal,
-which are superseded by specific direction from the bid team.
+> [!important] Requirement Precedence
+> In case of conflict:
+> Requirements of the plans and specs
+> are superseded by the terms of our proposal,
+> which are superseded by specific direction from the bid team.
 
 <!--
 Where NEC, IBC, and other applicable codes fall in this hierarchy
 is subject to some debate.
 -->
 
-## Wiring Method Selection
+Seek to use the cheapest method,
+as determined by Senior Construction Estimator
+and Database Administrator,
+as allowed for the situation.
 
-See [[wiring-method-selection]].
+* [[wiring-method-selection]]
+* [[wiring-device-research]]
 
 ## Voltage Drop
 
@@ -33,46 +40,26 @@ Unless explicitly stated in the plans or specs,
 conductors are to be sized according to the relevant schedule,
 _without respect for voltage drop_.
 
-### Feeders and Unit Subfeeds
+### Subfeeds
 
-<!-- TODO: -->
+1. Read about the project specifications and construction type
+  * Delivery Method: (Plans & Specs, Design Build, Design Assist, Preliminary Budget)
+  * Corridor Ceiling type
 
-### Branch Circuits
+2. In the drawings, locate:
+  * Unit Panel Schedules
+  * Unit Load Calculations
+  * Riser Diagram
+  * Subfeed schedule (if present)
 
-If voltage drop is to be considered in takeoff,
-Use the table provided in the drawings.
-If no table is provided, use the following:
+<!--
+TODO: Create flow chart for wiring methods.
+Some cases to mention:
+* Deck thickness (minimum 3x conduit outer diameter)
+* Renovations (may not be able to run in slab)
+-->
 
-| Wire Size | Max Length |
-| ---------:| ----------:|
-|       #12 |      100ft |
-|       #10 |      200ft |
-|        #8 |     >200ft |
 
-## Wiring Device Selection
-
-Wiring devices and their wall plates are a common target of [[gold-plating]].
-
-* Device grade: commercial < specification
-* Minimum rating for general-use receptacles: N5-15R < N5-20R
-* Device form-factor: Duplex/toggle < Decora
-* Device cover plate material: Plastic < nylon < aluminum < stainless steel
-* Device cover plate size: standard < mid-size < oversize "jumbo"
-* Device cover plate attachment: Standard < screwless
-* Floor box material: Steel < cast iron
-* Floor box cover plate material: plastic < brass < aluminum
-
-> [!info] Search Terms Relevant to Wiring Device Selection 
-> * "Decora"
-
-> [!info] Example Specs Relevant to Wiring Device Selection[^1]
-> * 26XXXX - Wiring Devices
-> * 26XXXX - Boxes And Covers For Electrical Systems
-> * 26XXXX - Lighting Control Devices
-> * 26XXXX - Network Lighting Controls
-
-[^1]: Specification section titles and scope may vary greatly between projects.
-  The examples provided are not an exhaustive list.
 
 ## Emergency Systems