Upload
karin-davis
View
213
Download
0
Embed Size (px)
Citation preview
Greg BlattPenn State
Architectural EngineeringConstruction Management
April 12, 2004
901 New York AvenueWashington, D.C.
Greg Blatt Construction Management
901 New York AvenueWashington, D.C.
Greg Blatt Construction Management
901 New York AvenueWashington, D.C.
Greg Blatt Construction Management
Class A Office Building
Cost: $54,000,000
Size: 580,00 Square Feet
Construction Dates: August 2002 – October 2004
Uses: Office space, street-level retail, underground parking garage, & a health club
Project Information
901 New York AvenueWashington, D.C.
Pour Sequencing
Foundation Redesign
LEED Certification
Greg Blatt Construction Management
901 New York AvenueWashington, D.C.
Greg Blatt Construction Management
POUR SEQUENCING
FOUNDATION REDESIGN
LEED
Original Parameters
• 9 pours per floor
• Columns poured the day after the slab for each section
• Pour #1 for each floor was started after Pour #4 for the previous floor
• Originally scheduled from May 20, 2003 to November 6, 2003
• 124 days on the schedule
901 New York AvenueWashington, D.C.
Greg Blatt Construction Management
POUR SEQUENCING
FOUNDATION REDESIGN
LEED
Pour Breaks
9
8
7
6
5 4 3 2 1
901 New York AvenueWashington, D.C.
Greg Blatt Construction Management
POUR SEQUENCING
FOUNDATION REDESIGN
LEED
Proposed Parameters
• 9 pours per floor
• Columns poured the day after the slab for each section
• Pour #1 for each floor was started after Pour #4 for the previous floor
• Originally scheduled from May 20, 2003 to October 31, 2003
• 119 days on the schedule
• Durations changed on the lower floors to accelerate the schedule
901 New York AvenueWashington, D.C.
Greg Blatt Construction Management
POUR SEQUENCING
FOUNDATION REDESIGN
LEED
ComparisonLevel Original Duration
(days)Proposed Duration
(days)Comparison (days)
Second 36 33 -3
Third 24 23 -1
Fourth 23 22 -1
Fifth 22 22 0
Sixth 22 22 0
Seventh 23 22 -1
Eighth 23 22 -1
Ninth 22 22 0
Tenth 22 22 0
Eleventh 22 22 0
Roof 19 19 0
Total 124 119 -5
901 New York AvenueWashington, D.C.
Greg Blatt Construction Management
POUR SEQUENCING
FOUNDATION REDESIGN
LEED
Sequencing Conclusion
• One week was saved due to the schedule acceleration.
• Other trades can begin their work earlier.
• This allows the occupants to move into their spaces earlier.
• The owner will be able to start to make money on building at an earlier date.
901 New York AvenueWashington, D.C.
Pour Sequencing
Foundation Redesign
LEED Certification
Greg Blatt Construction Management
901 New York AvenueWashington, D.C.
Greg Blatt Construction Management
POUR SEQUENCING
FOUNDATION REDESIGN
LEED
Foundation Redesign
• Change from column footings to a mat foundation
• Potential savings in the schedule
• Mat foundation will be more expensive (extra materials & labor)
• Economical comparison
901 New York AvenueWashington, D.C.
Greg Blatt Construction Management
POUR SEQUENCING
FOUNDATION REDESIGN
LEED
Original Design
• 146 Column Footings
• 39 are combined footings
• Smallest Footing – 4’-6” x 4’-6” x 21”
• Largest Footing – 17’-0” x 17’-6” x 64”
• 15,000 psi soil bearing capacity
• Scheduled for 35 days
• Estimated Cost of $645,966
901 New York AvenueWashington, D.C.
Greg Blatt Construction Management
POUR SEQUENCING
FOUNDATION REDESIGN
LEED
Mat Foundation Design
• Check for punching shear
• Determine thickness for different strengths of concrete
• Estimate costs for each strength of concrete
• Estimate time duration
• Compare to column footing design
901 New York AvenueWashington, D.C.
Greg Blatt Construction Management
POUR SEQUENCING
FOUNDATION REDESIGN
LEED
Mat Foundation DesignConcrete
Strength (psi)Foundation
DepthCost
3,000 5’-7” $ 1,806,517
4,000 5’-2” $ 1,671,703
5,000 4’-10” $ 1,563,851
6,000 4’-6” $ 1,455,999
901 New York AvenueWashington, D.C.
Greg Blatt Construction Management
POUR SEQUENCING
FOUNDATION REDESIGN
LEED
Mat Foundation Design
• 6,000 psi concrete foundation was the least expensive of the 4 options analyzed
• Estimated to take 45 days to complete
901 New York AvenueWashington, D.C.
Greg Blatt Construction Management
POUR SEQUENCING
FOUNDATION REDESIGN
LEED
Foundation Comparison
Column Footings
Mat Foundation
Change
Cost $645,966 $ 1,455,999
+ $ 810,033
Duration 35 days 45 days + 10 days
901 New York AvenueWashington, D.C.
Greg Blatt Construction Management
POUR SEQUENCING
FOUNDATION REDESIGN
LEED
Foundation Conclusion
• Mat foundation costs approximately $810,000 more than the column footings.
• Mat foundation is estimated to take 10 more days to complete than the column footings.
• Overall, the column footings were a better choice as a foundation system for this project.
901 New York AvenueWashington, D.C.
Pour Sequencing
Foundation Redesign
LEED Certification
Greg Blatt Construction Management
901 New York AvenueWashington, D.C.
Greg Blatt Construction Management
POUR SEQUENCING
FOUNDATION REDESIGN
LEED
LEED Certification
• Analyze the project to check if it meets the minimum LEED Certification requirements.
• If it does not meet those requirements, suggest ways to get the project to an acceptable certification level.
901 New York AvenueWashington, D.C.
Greg Blatt Construction Management
POUR SEQUENCING
FOUNDATION REDESIGN
LEED
LEED Certification
• LEED Rating Version 2.1
• Rated: 26 – 32 points
• Silver: 33 – 38 points
• Gold: 39 – 51 points
• Platinum: 52 + points
• Total of 69 points that can be earned
901 New York AvenueWashington, D.C.
Greg Blatt Construction Management
POUR SEQUENCING
FOUNDATION REDESIGN
LEED
Initial LEED Analysis
LEED SECTION points earned / points possibleSustainable Site 6 / 14Water Efficiency 1 / 5Energy & Atmosphere 3 / 17Materials & Resources 0 / 13Indoor Environmental Quality 0 / 15Innovation & Design Process 1 / 5Total 11 / 69
901 New York AvenueWashington, D.C.
Greg Blatt Construction Management
POUR SEQUENCING
FOUNDATION REDESIGN
LEED
Suggestions
• Dedicated Outdoor Air System (DOAS)
• Construction Waste Management System
• Use of Local/Regional Materials
• Additional Daylighting
• Designated spots for carpooling
901 New York AvenueWashington, D.C.
Greg Blatt Construction Management
POUR SEQUENCING
FOUNDATION REDESIGN
LEED
LEED Analysis w/ Suggestions
LEED SECTION points earned / points possibleSustainable Site 7 / 14Water Efficiency 4 / 5Energy & Atmosphere 4 / 17Materials & Resources 6 / 13Indoor Environmental Quality 9 / 15Innovation & Design Process 4 / 5Total 33 / 69
901 New York AvenueWashington, D.C.
Greg Blatt Construction Management
POUR SEQUENCING
FOUNDATION REDESIGN
LEED
LEED Conclusion
• The original design would not meet LEED Certification requirements.
• By implementing the suggested items, 33 credits were obtained for the certification process.
• The suggested items led to a rating of Silver for the project.
901 New York AvenueWashington, D.C.
Greg Blatt Construction Management
Conclusions
Pour Sequencing – Accelerated the schedule by 1 week
Foundation Redesign – Column footings are a better choice than a mat foundation
LEED Certification – Changes could be implemented to reach a minimum certification level.
901 New York AvenueWashington, D.C.
Greg Blatt Construction Management
THANK YOU
Alison Starner – Clark Construction
Marshall Singh – Clark Construction
Cathy Barus – Clark Construction
Jon Kolbe – Clark Concrete
Frank Schultz – Hensel Phelps
Walt Schneider – AE Faculty
AE Faculty & Staff
Family & Friends
901 New York AvenueWashington, D.C.
Greg Blatt Construction Management
QUESTIONS