154 lines
3.6 KiB
Markdown
154 lines
3.6 KiB
Markdown
---
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aliases:
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- pre-takeoff research
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title: Pre-Takeoff Research
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tags:
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- occupational
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- type/guide
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---
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# Pre-Takeoff Research
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%%
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This note should be arranged chronologically:
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%%
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%%
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## Requirement Sources
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* Drawings
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* Project Manual (Specifications)
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* GC Narrative
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* GC verbal direction
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* [[pdi-bid-estimating|Bid]] proposal
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* Bid verbal direction
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%%
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> [!important] Requirement Precedence
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> In case of conflict:
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> Requirements of the plans and specs
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> are superseded by the terms of our proposal,
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> which are superseded by specific direction from the bid team.
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%%
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Where NEC, IBC, and other applicable codes fall in this hierarchy
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is subject to some debate.
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%%
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> [!aside] "Plans & Specs"
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> The oft repeated "per plans and specs" is a gross oversimplification:
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> The RFP documents will---more likely than not---
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> have one or more irreconcilable contradictions,
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> or some instance of [[gold-plating]] too egregious to accept.
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> When ConEst takes off a project "per plans and specs",
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> we are taking off _Bid's interpretation_ of the RFP documents,
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> which they must be able to articulate.
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%%
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The limitations of Bid's authority are currently being questioned,
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%%
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Seek to use the cheapest method
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(as determined by Senior Construction Estimator
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and Database Administrator),
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as allowed for the situation.
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* [[wiring-method-selection]]
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* [[wiring-device-research]]
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* [[emergency-systems-research]]
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* [[low-voltage-raceway-selection]]
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## General
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Read about the project specifications and construction type:
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* Delivery Method: (Plans & Specs, Design Build, Design Assist, Preliminary Budget)
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* Deck thickness
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* Wiring methods
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* Conductor material
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Locate:
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* Main Electrical rooms and panel locations
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## By System
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### Feeders
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Read about the project specifications and construction type:
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* Deck thickness
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* Wiring methods
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* Conductor material
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* Wire terminations (mechanical acceptable or compression required?)
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Locate:
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* Riser Diagram
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* Feeder Schedule (if present)
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### Subfeeds
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1. Read about the project specifications and construction type
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* Corridor Ceiling type
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2. In the drawings, locate:
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* Unit Panel Schedules
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* bus amps
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* Unit Load Calculations
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* Subfeed schedule (if present)
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### Units
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2. Read about the project specifications and construction type
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* partition framing
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* stud material (wood or metal)
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* stud depth
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* wiring methods (NM or MC)
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* wiring device plates (decora or standard)
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* wiring device specs (are 15A devices allowed or minimum N5-20R)
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* equipment (20A Kitchen and bath)
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### Electrical
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1. Locate Equipment Schedules
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### Fixtures
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1. Read about the project specifications and construction type
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2. In drawings, locate:
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* Fixture Schedule
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* Reflected Ceiling Plans
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### Low Voltage
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1. Locate Proposal/Scope of Work. Determine ownership and takeoff responsibility:
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* Cabling
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* Conduit & Pathways
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* Sleeving
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2. In the drawings, locate:
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* Floor plans where LV scope is shown
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* LV Details
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### Telecom
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1. Locate MDF (aka MTR, MPOE) and IDF Rooms
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2. Locate Proposal/Scope of Work. Determine ownership and takeoff responsibility:
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* Cabling
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* Conduit & Pathways
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* Sleeving
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3. Locate which plans the LV is taken off on
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4. Locate LV Details
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5. Read about the project specifications and construction type
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6. Assume 28" MSDE if not specified.
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## Voltage Drop
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Unless explicitly stated in the plans or specs,
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conductors are to be sized according to the relevant schedule,
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_without respect for [[voltage-drop|voltage drop]]_.
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%%
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TODO: Create flow chart for wiring methods.
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Some cases to mention:
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* Deck thickness (minimum 3x conduit outer diameter)
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* Renovations (can't route in existing slabs)
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%%
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