vault backup: 2026-06-04 16:59:32
This commit is contained in:
@@ -8,19 +8,46 @@ daily: "[[2026-06-03]]"
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## 303 Mariposa Residence Senior Review
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[[conest-senior-review]] for [[303-mariposa-residence]].
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[[conest-senior-review]] for [[303-mariposa-residence]]
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lead by [[joel-jansen]] and attended by [[zane-meyers]] and [[jared-defanti]].
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### Selling Price
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[[pdi-bid-estimating|Bid]]'s proposal base bid \$800,000
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[[pdi-bid-estimating|Bid]]'s proposal base bid was \$800,000,
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but in response to the [[conest-pre-takeoff-confirmation]]
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[[joshua-komis]] said to add \$65,000 for secondaries.
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Joel messaged [[joshua-komis|Joshua Komis]] to clarify.
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We found correspondence
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that the secondaries were sold as $10,000 for conduit
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and $65,000 for wire.
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Joel messaged Komis to clarify.
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He responded to use \$875,000.
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### Site Run Adders
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previous direction to use 15ft adders for site runs
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It would be easier to assume 10ft for all cases
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Joel agreed
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Joel questioned the use of 15ft adders for secondaries.
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I explained their use was based on prior direction he had given below.
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> [!quote] feeders-takeoff.md
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> #### Adders
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>
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> Use the difference in elevation between equipment
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> or 10ft, whichever is greater.
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>
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> Add an additional 5ft (total 15ft) for site runs
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> (primaries, secondaries, etc.).
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Joel remembered and started to move on.
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Jared asked if the extra adder was for vertical distance or routing contingency,
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Joel responded that it was sort of both.
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I suggested that if it may be necessary to adjust them anyway,
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and "site runs" often being up to interpretation,
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it may be preferable to assume 10ft to start for all cases
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where the start and end are on the same level.
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That is, remove the conditional 5ft extra adder from the script.
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Joel agreed.
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Mariposa's site runs didn't need adders at all
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since we added PVC80 stub-ups.
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@@ -36,6 +63,8 @@ Solar [[feeders-takeoff]] used copper feeder size
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based on aluminum size shown in Solar set.
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No change necessary.
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We should have added the solar one-line to LiveCount.
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### Material Pricing
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Joel requested pricing for the dimmable receptacles from [[pdi-procurement]].
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@@ -47,8 +76,8 @@ but taken off as 2 counts each.
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### Telecom
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[[telecom-takeoff]] used Cat5e
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which we assumed, but did not note visibly.
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[[telecom-takeoff]] assumed Cat5e
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but we did not note the assumption visibly.
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### Fire Alarm
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@@ -60,13 +89,18 @@ which we assumed, but did not note visibly.
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assuming a dozen or so interconnected smokes.
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\$26,XXX was the quote
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for sprinkler monitoring only
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for sprinkler monitoring only.
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"only one assembly"
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### Closeout
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#### Sales Tax
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#### Final Pricing
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[[pdi-accubid-final-price]] 10.35%
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[[pdi-accubid-final-price]]
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##### Sales Tax
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10.35%
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#### Equipment
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@@ -0,0 +1,245 @@
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---
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id: 2026-06-04T10:05:03-0400
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title: 2026-06-04 10:05:03
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tags: []
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daily: "[[2026-06-04]]"
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---
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# 2026-06-04 10:05:03
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## Mechanical Rules of Thumb
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### Cooling towers
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Avoid single cell tower
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Avoid tower without a bleed-off
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Avoid tower without heat trace and insulation on the make-up water
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Avoid line-to-line bypass (in lieu of dumping into the sump)
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### Chillers/chilled water
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Avoid one chiller system (exception: dual circuit air-cooled)
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Avoid series chillers without bypasses
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Avoid a coil with more than 14 fins/inch
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### Equipment/misc.
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Avoid simplex air compressor
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Avoid simplex sump pump
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Avoid dx built-up systems (vav)
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Avoid coil face velocity above 550 fpm (could send condensate down ductwork)
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Avoid horizontal cold water lines or horizontal roof drain lines above ceilings without insulating (dripping/sweating)
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Isolation valves on both sides of all equipment - good practice
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Think about future service: don't locate where dangerous to service
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Avoid discharging roof drains onto a driveway or where pedestrian traffic
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Avoid floor mounted water closets in commercial buildings - cleaning issue
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Minimum 4" housekeeping pads underneath all floor mounted equipment
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Ashrae recommends 400 fpm face velocity maximum at intake louvers
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Avoid standard filters at more than 500 fpm (see mfgr recommendations)
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Trap primers on all floor drains
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### Ashrae 62 (ventilation)
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* 20 cfm/person oa in office buildings.
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exceptions: large assembly areas
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* 15 cfm/person oa in schools.
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note: this ventilation might exceed the local codes,
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but ashrae recommendations should be met.
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### Smacna pressure class
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* 1" wg - low pressure
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* 3" wg - medium pressure
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* Under 3" wg - smacna does not recommend duct testing
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If higher static pressures are specified,
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try to get lower pressure classes approved.
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The savings in duct costs are significant.
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### Ductwork sizing
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| Case | Max Friction Per 100ft |
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| ------------ | ---------------------- |
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| Low pressure | 0.10" |
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| Exhaust duct | 0.15" |
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| Case | Velocity FPM |
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| --------------------- | ------------------------------- |
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| Medium pressure riser | Max 3000 |
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| Medium pressure | Max 2500 |
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| Low pressure | Max 1800-2000 |
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| Return air shaft | Max 1000 |
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| Outside air shaft | Max 1000 |
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| Grease duct | Target 1800, Min 1500, Max 2200 |
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Due to excessive noise,
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Avoid fan-powered or VAV boxes larger than 2000 CFM.
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Install a balance damper at each low-pressure runout to diffusers.
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No more than 90° turn with flex duct, straight duct run into boxes.
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Where space permits,
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consider converting rectangular ductwork to round ductwork.
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Energy code requires all duct to be sealed.
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### Pumps
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Try to locate condenser water pumps as low as possible
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as compared to the cooling tower basin - NPSH - gravity flow.
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Select pumps for "non-overloading".
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Select impeller no larger than 90% of maximum impeller size.
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### Air units
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| Tons | CFM/Ton |
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| ------------- | ------- |
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| under 20 | ~400 |
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| 25 and larger | ~350 |
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Avoid VFD bypass on VAV fan systems
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because it can blow apart duct in manual mode.
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Consider a spare VFD, or dump damper/blow-out doors.
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Avoid larger economizer systems without powered exhaust.
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### Useful formulas (standard conditions)
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Quantity (CFM) = Velocity (FPM) * Area (SF)
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Sensible load (BTUH) = 1.08 * CFM * (Delta-T)
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Latent load (BTUH) = 0.68 * CFM * (Delta-GR)
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Total load (BTUH) = 4.45 * CFM * (Delta-H)
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* Formula for water:
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* Load (BTUH) = 1.08 * CFM * (Delta-T)
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$$
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\rm{GPM} = \frac{\text{Load (BTUH)}}{500 \times \text{Delta-T}}
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$$
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* A/C equipment efficiencies:
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$$
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$$
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### Conversion factors
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* 1 PSI = 2.307 ft of water
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* 1 ton A/C = 12,000 BTUH
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* 1 hp = 2545.1 BTUH = 745.7 watts
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* 1 kW = 341 5 BTUH
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* 1 cubic foot = 7.48 gallons
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* 1 gal. of water = 8.345 lbs
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### pipe sizing
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* 8 to 10 FPS max. Velocity
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* 6 FPS max. Velocity (public areas - noise)
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* 10 to 15 FPS velocity in central plant headers or on roof
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* 3" ano smaller: max head loss 6 ft/100 ft
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* Schedule 40 blk. Stl. Pipe sizing: (* std wt)
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### Hvac piping
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* Chilled water: 2 GPM/ton (12°F Delta-t)
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* Condenser water: 3 GPM/ton
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#### Thermal Expansion
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(steel pipe): 1" expansion/100 ft of pipe/100°F rise
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### A/C condensate/waste sizing
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| Tons | Pipe Size |
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| -------- | --------- |
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| Up to 20 | 3/4" |
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| 21--40 | 1" |
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| 41--90 | 1-1/4" |
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| 91--125 | 1-1/2" |
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| 126--250 | 2" |
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### Air device sizing
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| CFM | Neck Size |
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| --------- | --------- |
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| Up to 150 | 6" |
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| 151--250 | 8" |
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| 251--450 | 10" |
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| 451--650 | 12" |
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| 651--800 | 14" |
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### FPB/VAV sizing
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| Inlet Size | Max CFM |
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| ---------- | ------- |
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| 6" | 450 |
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| 8" | 700 |
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| 10" | 1200 |
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| 12" | 1700 |
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| 14" | 2300 |
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Note: runout distance is very important.
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The inlet size shown is not necessarily the correct runout size to the box.
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(Medium pressure runs 0.3 ft/100 ft max)
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### Cooling loads
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| Building Type | SF/Ton |
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| ------------------ | -------- |
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| Office buildings | 300--325 |
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| Tempered warehouse | 500 |
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| Call center | 275--300 |
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* Typical air distribution for office bldgs:
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* north 1.5 CFM/SF
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(assumes 12 ft zone east 2.0 CFM/SF and 25°F Delta-t)
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* south 2.5 CFM/SF
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* west 2.5 CFM/SF
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* interior 0.8 CFM/SF
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* total should avg 0.8 to 1.0 CFM/SF gross
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* Smoke evacuation: 1 CFM/SF
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* Stairwell pressurization: 2000 CFM/floor
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### Plumbing Fixture Runout Minimum Size Schedule
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| Fixture | Waste | Vent | Cold | Hot |
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| ---------------------- | ------ | ------ | ---- | ---- |
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| Water Closets | 4" | 2" | 1" | - |
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| Lavatories | 1-1/2" | 1-1/2" | 1/2" | 1/2" |
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| Urinals | 2" | 1-1/2" | 3/4" | - |
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| Sinks | 2" | 1-1/2" | 1/2" | 1/2" |
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| Service Sinks | 3" | 2" | 3/4" | 3/4" |
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| Hose Bibbs | - | - | 3/4" | - |
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| Box Hydrants | - | - | 3/4" | - |
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| Electric Water Coolers | 2" | 1-1/2" | 1/2" | - |
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| Showers | 2" | 2" | 1/2" | 1/2" |
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@@ -0,0 +1,20 @@
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---
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id: 2026-06-04T11:40:49-0400
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title: 2026-06-04 11:40:49
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tags: []
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daily: "[[2026-06-04]]"
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---
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# 2026-06-04 11:40:49
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Expect that people's explanations
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of what they do and why they do it
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will be related to what they _actually_ do
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and why they _actually_ do it,
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but if you care to meet or exceed their ability
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never take those explanations at face value.
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It is well known that the ability of individuals
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to perform complex practiced tasks
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_far_ exceeds their ability to explain their process.[^1]
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[^1]: See [[kahneman_2011_thinking]]
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@@ -0,0 +1,120 @@
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---
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id: 2026-06-04T13:20:08-0400
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title: 2026-06-04 13:20:08
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tags: []
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daily: "[[2026-06-04]]"
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---
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# 2026-06-04 13:20:08
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## 303 Mariposa Residence
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[[conest-manager-review]] for [[303-mariposa-residence]]
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lead by [[josh-ford]] as ConEst Manager
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attended by [[joel-jansen]] as ConEst Senior Estimator
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and [[jared-defanti]] and [[zane-meyers]] as ConEst Estimators.
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### Temporary Power
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> "Do they really need \$10,000 for temp power?"
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\$2,500 and 50hrs
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### Site Lighting
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Pole Bases
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> "I would leave it if it's for the bollards. It can't be that much."
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### Site Low Voltage Duct Bank
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Josh okayed assumptions for site runs
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secondaries
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### Putty Pads
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add putty pads equal to device boxes
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### Feeders
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%% is run from inverter to EM diff size from MDP to inverter? %%
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### Dimmable Receptacles
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> Lutron Homeworks devices are thicker,
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> need deep boxes.
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### Lighting/Shade Controls
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[[lighting-controls-takeoff]]
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#### Trough
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`COMMON ASSEMBLIES`/`DISTRIBUTION`/`LIGHTING CONTROL PANEL INSTALLATION`/`_ - LIGHTING CONTROL PANEL INSTALLATION & TROUGH - ...`
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used 4 section
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changed labor time from 4 to 6
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added 500ft \#12/2 NM
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### Telecom
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> "I'm surprised this isn't a certified system"
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Changed assumed Cat5e to Cat6
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> "I feel like we don't ever install Cat5 anymore"
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>
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> "A house on the upper range like this isn't going to go with Cat5"
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AV Coordination.pdf
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TV Specs: 3 Cat6
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### Fire Alarm
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Leaving smokes despite direction
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for budgetary purposes.
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### Closeout
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#### Labor Plan
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> "I don't think you can even do a labor plan."
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> "Just leave it all at 100%."
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> "I use World (Electric) for everything, I don't care where it is."
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#### Subs
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Excavation $5,000
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Wireways, Troughs: $1,250
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#### General Expenses
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Lower Office Supplies to $2,500
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Delete Customer Development
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##### Duration
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Approved Labor Plan says 16 months
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Removed all under "Jobs > \$3mil COGs"
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Josh said he removed COGs with Aaron's direction
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on a job sold at \$3.8 million.
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#### Equipment
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Removed two-way radio
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#### Material Pricing
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> Josh: "Put \$400 for the Quazite." \
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> Joel: "I put \$1,200." \
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> Josh: "You put \$1,200? Okay put \$500."
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### Conclusion
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surprised by high margin,
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checked bid takeoff
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found large cost difference in relocation budget
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Reference in New Issue
Block a user