Ethan A. Battiston 2004 AE Senior Thesis Construction Management

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Ethan A. Battiston2004 AE Senior
ThesisConstruction Management
The Edgemoor CondominiumsBethesda, Maryland
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Ethan A. Battiston2004 AE Senior
ThesisConstruction Management

• Project Overview
• PN Hoffman Construction Development
• The Edgemoor Condominiums
• Schedule Reduction of Finishing Trades
• Matrix Scheduling
• Activity Train Development
• Improves Cash Flow
• 3D MEP Coordination
• 3D Model of Single Unit
• Avoiding Design Busts
• Structural Floor Slab Redesign
• Reduces Construction Cost
• Reduces the Number of Activities Associated with
  Buildings Structure

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Project Overview

• PN Hoffman Construction Development
• Owner and General Contractor
• Construction Management Team
• Design Development Team (Sales)
• QA Department

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Project Overview

• Edgemoor Condominiums
• 10 Floors with 3 Sub-Grade Garage levels
• Traditional Double-Hung Windows
• Two Floors of Pre-Cast Stone

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Project Overview

• Edgemoor Condominiums
• Balconies with Cast Iron Decorative Railings
• Fiber Reinforced Plastic (FRP)
• Mansard Roof with Copper Gutters and Down Spouts

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Project Overview

• Edgemoor Interior
• Open Floor Plan
• Bamboo or Oak Flooring
• Oversized Base Board
• Wood Paneled Doors

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Project Overview

• Edgemoor Interior
• Open Kitchen design
• Stainless Steel Appliances
• Granite Kitchen Counters
• Maple or Cherry Cabinet Finishes
• Ventless Gas Fireplaces

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Schedule Reduction

• Existing Conditions
• SIPS
• Work Zones
• Matrix Schedule
• Activity Train
• Overall Schedule Reduction

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Schedule Reduction

• Existing Conditions
• Large Amount of Trade Work on Lower Floors
• Weekend Shifts Mandatory
• Interior Trades Became Increasingly Off Schedule
• Delays Due to Shipping and Weather

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Schedule Reduction

• Short Interval Production Schedule SIPS
• Ideal For Repetitive Projects and Activities
• Utilizes High Level of Detail
• Sets Crew Sizes to Unify Activity Durations

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Schedule Reduction

• SIPS
• Uses Many Efficient Tools
• Work Zone Identification
• Activity Trains
• Matrix Scheduling

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Schedule Reduction

• Work Zones Identification
• East Zone Mirrors West Zone

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Schedule Reduction

• Activity Train
• Activity Train

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Schedule Reduction

• Activity Train
• Activity Train

Duration in Weeks
1st Floor East Zone
1st Floor West Zone
Activities 1-36 1 Activity Per Week Per Zone
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Schedule Reduction

• Matrix Schedule
• Microsoft Excel Worksheet
• Intended For Weekly Updates

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Schedule Reduction

• Matrix Cells

Actual Date
Scheduled Date
1 Day Off Schedule
Floor
Actual Start
Actual Finish
Scheduled Start
Scheduled Finish
Actual Duration
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Schedule Reduction

• Conclusion
• 2 Week Overall Reduction

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Schedule Reduction

• Conclusion
• Large Schedule Reduction on Lower Floors
• Improves Cash Flow

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MEP Coordination

• MEP Coordination
• Limited Pre-Construction MEP Coordination
• First Come, First Serve Approach
• Limited Bulkhead Space
• 3D CAD

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MEP Coordination

• Limited Bulkhead Space

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MEP Coordination

• 3D CAD

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MEP Coordination

• 3D CAD
• No Direct Routing Due to Exposed Ceiling Finish

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MEP Coordination
Ductwork Space

• 3D CAD
• Trade Work Locations

Bulkhead Framing
Electrical Space
Fire Protection Space
Exhaust Vent
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MEP Coordination

• 3D CAD
• Identifies Problem Areas

Fire Protection Space
Exhaust Vent
Problem Area
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Structural Floor Slab Redesign

• Hollow Core Planks ILO Post Tension Slab
• Existing Floor Slab System
• Hollow Core Planks
• Girder Dimensions
• Hollow Core vs. Post Tension Cost Analysis

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Structural Floor Slab Redesign

• Existing Floor Slab System
• Cast-In-Place Concrete on all Columns and Garage
  Levels
• 7 Thick Post Tensioned Concrete Slab (2nd Floor
  to Roof Slab)
• 5,000 PSI _at_ 28 Day Compressive Strength
• Design Live Load 40 PSF 20 PSF for partitions
  60 PSF

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Structural Floor Slab Redesign

• Hollow Core Planks w/ 2 Top Coat (Nitterhouse,
  Inc.)
• Max Clear Span 25
• Thickness 8 ( 2 Top Coat)
• Allowable Live Load _at_ 25 98 PSF gt 60 PSF
  Design Live Load
• 5,000 PSI _at_ 28 Day Compressive Strength

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Structural Floor Slab Redesign

• Hollow Core Plank Layout
• 127 Planks per Floor x 10 Floors 1,270 Total

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Structural Floor Slab Redesign

• Average Estimated Girder Dimensions
• Avg. Clear Span 20
• Width Depth
• Mu 69K-Ft
• d2 (R Mu)/b ? (d2 (30 71K-Ft)/8 )
• b 8 d16
• Bar Sizes
• As (Mu Musw)/4d ? (78.3K-Ft)/(4 16)
  1.45 in2
• 2 8 Bars 1.58 in2
• Mn (1.58 in2)(60ksi)(13.5 (1.74/2))
  99.8K-Ft
• 99.8K-Ft gt 78.3K-Ft ? O.K.

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Structural Floor Slab Redesign

• Average Estimated Girder Dimensions

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Structural Floor Slab Redesign

• Girder Layout
• Avg. Clear Span 20
• 5,200 Linear Feet

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Structural Floor Slab Redesign

• Hollow Core vs. Post Tension Cost Analysis
• Post Tensioned System
• 3,470 CY
• Unit Price 370 per CY
• Total Cost 1,283,000
• Hollow Core System Estimate
• 115,000 SQFT
• Unit Price of Planks 4.71 per SQFT 541,000
• Pre-Cast Girders 126 per LNFT 655,000
• Total Cost 1,196,000
• 87,000 Savings in Construction Costs

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Structural Floor Slab Redesign

• Conclusion
• Minimal Overall Building Height Increase lt 3 FT
• Allows for Early Start Dates For Other Activities
  by Eliminating Most of the Scaffolding and
  Formwork Activities
• Minimal Altercation to Existing Floor Plan
• Total Cost Savings 87,000

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Summary

• Schedule Reduction of Finishing Trades
• Matrix Schedule Worksheet Helps Manage Finishing
  Trades
• Overall Schedule Reduction is 2 Weeks
• Improves Cash Flow Due to Early Owner Occupancy
  on Lower Floors
• 3D MEP Coordination
• Helps Contractors Graphically Identify Problem
  Areas
• Improves On-Site MEP Contractor Efficiency
• Structural Floor Slab Redesign
• Pre-Cast Hollow Core Planks Reduces Construction
  Cost by 87,000
• Minimal Impact on Interior Architectural
  Integrity

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Special Thanks

• AE Faculty Staff
• PN Hoffman Construction Development
• Steve Schrenk Project Executive
• Tom Kenton Project Manager
• Gary Ward Site Manager
• Brian Zemcik Asst. Site Manager

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Questions?