Estimating PS&E – Plans, specifications and estimate 1.

Estimating Estimating

PS&E – Plans, specifications and estimate

1

Types of Estimates Types of Estimates

Ball-Park (Planning phase)

Preliminary (Design Report/EIS)

Detailed (PS&E---Detailed Design)

2

Estimate QualityEstimate Quality

Good book-keepingAccurate backup of quantitiesFamiliarity w/ projectExperience

3

4

Estimating ProcedureEstimating Procedure

List all item numbers-plans and similar plans

Estimate quantities and prepare a backup for each item #

Assign prices to each item (WAIPR) Lump sum price analysis Summary of quantities Add contingency Summarize final costs

5

Item NumbersItem NumbersReferenced to spec bookExamples:

◦201.07 Clearing and Grubbing◦203.xxxx Grade and Reshape

Ditches◦304.xx Subbase◦610.0203 Establish Turf◦634.01 Survey and Stakeout

*Special specifications—General or Special (must be approved)

6

UnitsUnitsUnit abbreviations

Definition

LS Lump Sum

EA Each

CY Cubic Yard

SY Square Yard

LF Linear Feet

TN Ton

MO Month

7

Units-MetricUnits-MetricUnit abbreviations

Definition

CM Cubic Meters

SQM Square meters

MT Metric Ton

KG Kilograms

M Meters

8

SpecificationsSpecificationshttps://www.dot.ny.gov/main/

business-center/engineering/specifications

9

Pay Item CatalogPay Item Catalog

https://www.dot.ny.gov/pic

10

Weighted Average Item Price Weighted Average Item Price Report (WAIPR)Report (WAIPR)

https://www.dot.ny.gov/divisions/engineering/design/dqab/waipr

11

Special Spec RepositorySpecial Spec Repository

https://www.dot.ny.gov/spec-repository-us/

12

ContingencyContingencyAdded to estimate to account for

unknowns Usually a percentage of final cost

13

Cost Estimate ExampleCost Estimate ExampleItem # Description Unit QTY Price Subtotal

201.0601 Clear & Grub LS 1.0 $12,500.00

$12,500.00

203.0100 Earth Cut & Emb

CY 14,545.0

$12.00 $174,540.00

10209.0100

Bale Dikes LF 42.0 $7.50 $315.00

403.1100 Asph Base Course

TN 6392.0 $38.00 $242,896.00

603.7303 24” RCP End Sec

EA 4.0 $700.00 $2,800.00

637.0701 Office MO 6 $1,000.00

$6,000.00

645.2140 Traffic Sign EA 8 $170.00 $1,360.00

14

Backup for Estimate ExampleBackup for Estimate ExampleITEM 640.0102 (White Paint Reflective Paint ITEM 640.0102 (White Paint Reflective Paint Stripes)Stripes)2 Shoulder StripesSta 26+44 to Sta 30+922*448’ = 896’Say 900’

15

Asphalt – English TonsAsphalt – English Tons.06865 Tons per Cubic Foot (Base).07525 Tons per Cubic Foot (Binder).07265 Tons per Cubic Foot (Top-

6F)

Old Marshall Design

New Superpave?????

16

Lump Sum Price AnalysisLump Sum Price AnalysisEstimate for items paid as a “Lump

Sum”

Includes:◦ Labor◦ Materials◦ Equipment◦ Rental costs◦ Profit and Overhead

Typical lump sum items:◦ Clearing and Grubbing◦ Survey and Stakeout◦ Temporary Traffic Signals

17

Lump Sum Analysis ExampleLump Sum Analysis ExampleItem 619.13 (Temporary Traffic Item 619.13 (Temporary Traffic Signal)Signal) Labor Costs

◦ Backhoe Operator-$30.05/hr

◦ Electrician-$32.99/hr

◦ Laborer-$22.95/hr

Prevailing Wages http://wpp.labor.state.ny.us/wpp/publicViewPWChanges.do?method=showIt

Installation and Removal of Temp. Poles◦ 1 Backhoe Operator $30.05/hr * 16 hours =

◦ 2 Laborers @ $22.95/hr * 16 hours =

Installation and Removal of Temp. Signal Heads◦ 1 Electrician @ $32.99/hr * 16 hours =

◦ 2 Laborer@ $22.95/hr * 16 hours =

Installation and Removal of Controller◦ 1 Electrician @ $32.99 * 16 hours =

◦ 1 Laborer @ $22.95 * 16 hours =

18

Lump Sum Analysis Lump Sum Analysis Example-Cont.Example-Cont.Item 619.13 (Temporary Traffic Item 619.13 (Temporary Traffic Signal)Signal) Materials

◦ Temporary Poles 4 @ $1,300.00 each

◦ Temporary Signal Heads 4 @ $250.00 each

◦ Controller, Fixed Time 1@ $1,000.00

◦ Misc. Hardwire and Wire $1,000.00

Equipment (Installation and Removal)

◦ 1 Bucket Truck @ $18.00/hr * 24 hours

◦ 1 Backhoe @ $35.00/hr * 24 hours

Profit and Overhead (20%)

19

Estimate SharesEstimate Shares

Highway BridgeUtilitiesDifferent Counties

20

Engineer’s EstimateEngineer’s Estimate

Quantities included in plans

Engineer’s estimate not given to contractor

Prices not available to contractor—each contractor provides their own bid

Lowest bidder gets the contract21

22

23