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