vault backup: 2026-04-27 17:01:41
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@@ -1,15 +1,19 @@
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---
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id: 2025-07-18T00:00:00-0400
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title: 2025-07-18 ??:??:??
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tags:
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- topic/construction
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- topic/estimating
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tags: []
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daily: "[[2025-07-18]]"
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---
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# 2025-07-18 ??:??:??
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## Estimating Isn't Engineering
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%%
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Anecdote criticizing the common preference for [[information]]
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in [[construction-estimating]],
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or maybe the common frustration when it isn't provided.
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%%
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A peer recently expressed frustration to me
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about the declining quality of construction drawings,
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specifically how systems are often missing details
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@@ -12,6 +12,18 @@ daily: "[[2025-11-06]]"
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## "Bad Bid Practice"
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%%
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Anecdote criticizing the common adversarial model
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of subcontractor-GC relations
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(or more generally contractor-customer)
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in [[construction-contracting]].
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My position is that
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deliberately hiding information from the customer
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(lacking [[transparency]] in interactions)
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always costs the contractor
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more than they stand to gain from it.
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%%
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I might be reprimanded for the things I've said about deceptive bid practices
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were I to repeat them to the wrong person,
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but I can't, in good conscience, take them back.
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@@ -1,12 +1,16 @@
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---
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id: 2026-01-30T16:29:00-0500
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title: 2026-01-30 16:29:??
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tags:
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- topic/math/statistics
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tags: []
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daily: "[[2026-01-30]]"
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---
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# 2026-01-30 16:29:??
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## New Statistics Concepts
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[[statistics]] topics researched while reading
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[[hubbard_2025_project-management]]:
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### Laplace's Rule of Succession (LRS)
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> [!info]
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@@ -20,7 +24,11 @@ $$
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\frac{1+m}{2+n}
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$$
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### Rule of Five
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### "Rule of Five"
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> Hubbard et al. speak of this "rule"
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> as if it's well known by that name,
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> but I can't corroborate that.
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The probability that any given sample is above the median is 50%.
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The probability that the minimum and maximum values of $n$ samples
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@@ -15,6 +15,7 @@ daily: "[[2026-04-23]]"
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Note extensive emergency power provisions
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verify control wiring for generator to ATS
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#### Lighting HR's
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count of circuits, control zones in takeoff notes
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@@ -36,6 +37,7 @@ extended light layouts
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ASL Column 2 with adjustments
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Site Labor +50%
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#### Telecom Backbone
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#### Medium Voltage
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@@ -45,6 +47,7 @@ Medium voltage cabling downstream of
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#### Underground Runs
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need rigid 90's for PVC runs 200ft and above
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> horizontal? vertical? both?
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#### Fixture Labor
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@@ -53,13 +56,14 @@ Tape light: 1 hour per 6 feet
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snap together linear: 1 hour per 5 feet
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##### Center Bar Fixture
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##### Center Bar Fixture
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assuming each crystal is an individual fixture
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over 5000 crystals
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80 circuits
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A-GAM-442
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Arch set A-GAM-442
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##### Dragon Fixture
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1000 hours
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@@ -75,6 +79,7 @@ or "Standalone" with Network Bridges.
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#### DAS
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Sold Design Build
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#### Historicals
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Want to know
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@@ -97,4 +102,3 @@ Extra cost for facade lighting install
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250,000
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"Go to 150k"
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@@ -0,0 +1,23 @@
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---
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id: 2026-04-27T10:05:24-0400
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title: 2026-04-27 10:05:24
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tags: []
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daily: "[[2026-04-27]]"
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---
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# 2026-04-27 10:05:24
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## Minimum Wire Size for Small Garage Buildings
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Relevant to [[electrical-takeoff]] and [[fixtures-takeoff]]:
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[[hilltop-gardens]] has 3 separate garage buildings,
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each with 12 isolated bays.
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The buildings are about 70ft long,
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with all runs less than 100ft.
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I asked [[joel-jansen]] if it would be necessary
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to use minimum 10 AWG
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as is [[conest]] standard
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for [[pdi-breakdowns#Bid Item Garage|Garage]].
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He said it would not be,
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and confirmed 12 AWG is acceptable in this case.
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@@ -0,0 +1,23 @@
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---
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id: 2026-04-27T12:19:33-0400
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title: 2026-04-27 12:19:33
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tags: []
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daily: "[[2026-04-27]]"
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---
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# 2026-04-27 12:19:33
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It is common in [[construction-contracting]]
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when offering [[value-engineering]] options
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or deductive [[change-orders]] to the customer
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to offer deducts less than your estimated value
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for the scope to be deducted.
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I'm sure in the wider industry
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the practice not maliciously motivated,
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only intended to cover the cost of estimating,
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but this is rarely communicated to junior estimators
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and never to the customer.
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In my own experience with it
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while with my previous employer,
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it was only ever justified as
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"because we can, because they don't know".
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@@ -0,0 +1,25 @@
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---
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id: 2026-04-27T12:43:54-0400
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title: 2026-04-27 12:43:54
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tags: []
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daily: "[[2026-04-27]]"
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---
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# 2026-04-27 12:43:54
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## Voltage Drop for ConEst
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Continuing a recent conversation
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I've been having with [[joel-jansen]]
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on [[voltage-drop]],
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both ideally and for application in [[conest]],
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Joel brought Bill Swan with Estimating Solutions
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over to my desk.
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Bill said that when he is calculating voltage drop
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he doesn't the ubiquitous "Voltage Drop Calc 2011.xlsx"
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which uses a simple DC calculation,
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he uses [[pdi-vdc]]'s calculator,
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which is based on AC resistance and reactance.
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I showed them my own calculator,
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which also has AC capability
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The difference
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@@ -0,0 +1,83 @@
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---
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id: 2026-04-27T12:56:35-0400
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title: 2026-04-27 12:56:35
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tags: []
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daily: "[[2026-04-27]]"
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---
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# 2026-04-27 12:56:35
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## Virginia Live! Internal Review
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[[virginia-live-casino-and-hotel]]
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Underfloor power is Reloc.
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Customer is curious if it would be more cost effective to use MC.
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Objective is to discuss closeout mainly:
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quotes and subs.
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FF&E
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Concern that all fixtures are captured
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"add a line for aiming and testing"
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1 week (80 hours)
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Shift rate
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"in the past we've paid a little more for night work,
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but nothing crazy"
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$2,500 per day scaffold
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### Site Services
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Ditch witches for most excavation
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idea floated to buy equipment rather than rent
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bobcat
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wire puller
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hydraulic bender
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Do we own dewatering?
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pretty sure yes
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### MV Terminations
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No one at PDI can perform MV terms
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so they must be subbed out
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worst case $300k
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9 terms $60k
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to be quoted by Ops
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### Testing
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primary injection testing
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NETA testing
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to be quoted by Ops
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### Rigging
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Ops quoted $85k to take one generator off the truck.
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to be quoted by Ops
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### Burden
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PTO not included in burden
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because it is not charged to the job
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### Admin Housing
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Ops paying $4,500 for 6-bed
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### Composite Cleanup
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terms in contract
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### Permits
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to be quoted by Ops
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