Terrell Place Washington D.C. Senior Thesis Presentation Tracy Lo April 16, 2003 Construction Management
Project Overview � An 11 Story cast-in-place concrete office building � Location: 575 7 th St NW Washington D.C. � Function: � Office Building � Retail space on 1 st floor � Parking garage Senior Thesis Presentation Tracy Lo April 16, 2003 Construction Management
Project Overview � Size: 439,390 sq ft � Construction Date: � Started in Aug of 2001 � Finish in Oct of 2003 � Cost: $48.5 million Senior Thesis Presentation Tracy Lo April 16, 2003 Construction Management
MCI Center F street, NW Existing New West Firehouse Hecht’s Building New Building Building 7th street, NW 6th street, NW Not in project Existing Gang of Four Terrell Place Existing Building Future Residential Existing AARP NRC E Street, NW N Terrell Place - Site Plan
Project Overview Project Team � Owner: Carr America Urban Development LLC � GC: Clark Construction Groups � Architect/Engineer: SmithGroup � Mechanical Contractor: Pierce Associates, Inc. � Electrical Contractor: Truland Systems Corp. Interesting Fact Named the Best Office Lease/Urban for 2001 in the Washington Business Journal’s Annual Best Real Estate Deals of the years awards with the largest law firm in Washington D.C. Senior Thesis Presentation Tracy Lo April 16, 2003 Construction Management
Presentation Outline Site Logistic � Studies of Historical Renovation � Possibilities of Using other Horizontal � Formwork Redesign the Foundation System � Research: Mold Issues in construction � industry Senior Thesis Presentation Tracy Lo April 16, 2003 Construction Management
Site Logistic Current Problem � Only one site plan developed � Relatively congested site and narrow access road Proposed Solution � Three phase site plans � Clearly show the location of the equipments and access during different phases � Create one way traffic flow Senior Thesis Presentation Tracy Lo April 16, 2003 Construction Management
Staging Area Curb Lane Entrance Construction Safety Fence Material Trash Chute Crane #1 Sheeting/ Hoist & Dumpster Shoring Existing 5-story New West Building Existing Hecht’s building 4 Basements Building (1 Basement) Excavation Ramp Construction Trailer Temporary Access Road for Sheeting/Shoring Crane #2 Demolition Debris Removal Existing Gang of Four (to be demolished) Façade Support Construction Safety Fence Existing AARP Building Existing Restaurant (5 story) Future Residential (under construction) Temporary Pedestrian Sidewalk Existing Site Plan
Staging Area Curb Lane Entrance Construction Safety Fence Material Trash Chute Sheeting/ Hoist & Dumpster Shoring Existing 5-story New West Building Existing Hecht’s building 4 Basements Building (1 Basement) Excavation Ramp Construction Trailer Excavation Temporary Access Road for Ramp Demolition Sheeting/Shoring Debris Removal Existing Gang of Four (to be demolished) Façade Support Construction Safety Fence Existing AARP Building Existing Restaurant (5 story) Future Residential (under construction) Temporary Pedestrian Sidewalk Demolition/Excavation Phase
Staging Area Entrance Curb Lane Construction Concrete Pump Safety Fence Material Trash Chute Crane #1 Sheeting/ Hoist & Dumpster Shoring Existing 5-story New West Building Hecht’s building Building Staging Area Construction Trailer Sheeting/Shoring Crane #2 Gang of Four Façade Support Construction Safety Fence Existing AARP Building Existing Restaurant (5 story) Future Residential (under construction) Temporary Pedestrian Sidewalk Superstructure Phase
Curb Lane Entrance Construction Safety Fence Material Trash Chute Mobile Crane Hoist & Dumpster Existing 5-story New West Building Hecht’s building Building Construction Trailer Gang of Four Construction Safety Fence Existing AARP Building Existing Restaurant (5 story) Future Residential (under construction) Temporary Pedestrian Sidewalk Finishes Phase
Presentation Outline Site Logistic � Studies of Historical Renovation � Possibilities of Using other Horizontal Formwork � Redesign the Foundation System � Research: Mold Issues in construction industry � Senior Thesis Presentation Tracy Lo April 16, 2003 Construction Management
Study of the facade Historical Preservation � Government of D.C. – Preservation law � 8 different types of windows on the façade and three different store front. Senior Thesis Presentation Tracy Lo April 16, 2003 Construction Management
Study of the facade Problem � Long installation time � Reason for delay Proposed Methods � Combining Precast and window supplier � But…..some windows are 10 feet high and 800 pounds, difficult for handling and shipping Senior Thesis Presentation Tracy Lo April 16, 2003 Construction Management
Presentation Outline Site Logistic � Studies of Historical Renovation � Possibilities of Using other Horizontal � Formwork Redesign the Foundation System � Research: Mold Issues in construction industry � Senior Thesis Presentation Tracy Lo April 16, 2003 Construction Management
Possibility of Using other Horizontal Formwork � Three options Structural changes Construction methods Original structural design Scaffolds and plywood New structural design PERI skydeck Original structural design PERI skydeck with customized design � Compare the cost and schedule for all the options � Each floor of the New West Building: 19,200 SF � Each floor of the GOF building: 12,000 SF Senior Thesis Presentation Tracy Lo April 16, 2003 Construction Management
Possibility of Using other Horizontal Formwork Original structural design using scaffolds and plywood (Option 1) � Two way slab with drop panels � Original slab thickness: 8 in � Drop panels: 8 in � Plywood and aluma frames � Cost: $0.83 – $0.91 / sf � Total cost of formwork and labor: $961,634 � Productivity rate:18-20 sf / mh � Duration of GOF: 104 days � Duration of West building: 164 days Senior Thesis Presentation Tracy Lo April 16, 2003 Construction Management
Possibility of Using other Horizontal Formwork New structural design using PERI skydeck (Option two) � ADOSS program, determine slab thickness Senior Thesis Presentation Tracy Lo April 16, 2003 Construction Management
Possibility of Using other Horizontal Formwork PERI skydeck � Cost: $1.10 -$1.50 / sf � Total cost and labor: $954,126 � Productivity rate: 20-30 sf / mh � Duration of GOF: 65 days � Duration of West: 113 days � Impact of changing the formwork Senior Thesis Presentation Tracy Lo April 16, 2003 Construction Management
Possibility of Using other Horizontal Formwork Original Structure using PERI skydeck with customized formwork around the drop panels (option 3) Cost of the formwork: $1.39-$1.50 / sf � Total cost of formwork and labor: $1,128,574 � Productivity rate:18-20 sf / mh � Same as option 1 � Senior Thesis Presentation Tracy Lo April 16, 2003 Construction Management
Possibility of Using other Horizontal Formwork Comparisons of the original method and the two other alternatives: Productivity Option Cost Total Cost Rate Duration Advantages Disadvantages 1 - Original design with drop $0.83 $961,634 18-20 GOF –102 days Traditional Relative slower rate panels using -0.91/ sf / mh West – 164 days method stick build sf method Cheapest 2 - Flat slab $1.10 GOF –65 days fastest method Less plenum space, using PERI -1.50/ $954,126 20-30 West -113 days among the three changes of structural Skydeck sf sf / mh options design 3 - Original Most expensive, design with drop $1.39 $1,281,574 18-20 GOF –102 days No changes in relative slower rate panels using -1.50/ sf / mh West – 164 days structural design customized PERI sf Skydeck Senior Thesis Presentation Tracy Lo April 16, 2003 Construction Management
Presentation Outline Site Logistic � Studies of Historical Renovation � Possibilities of Using other Horizontal Formwork � Redesign the Foundation System � Research: Mold Issues in construction industry � Senior Thesis Presentation Tracy Lo April 16, 2003 Construction Management
Analysis 4: Redesign the Foundation Systems Problem � Spread Footings � Constructability issues: � Difficult to construct the spread footings for this project due to the footings having different elevations adjacent to each other � OSHA standard - sloping back around the excavation was necessary Proposed System � Mat slab foundation Senior Thesis Presentation Tracy Lo April 16, 2003 Construction Management
Analysis 4: Redesign the Foundation Systems West Building Thickness of Volume Concrete Unit Cost Foundation (in) Cost 3000 psi 57 4642 77 357405 4000 psi 53 4397 84 367177 5000 psi 50 4107 86 352959 Gang of Four Thickness of Volume Concrete Unit Cost Foundation (in) Cost 3000 psi 42 1093 77 122652 4000 psi 39 1479 84 123506 5000 psi 37 1107 86 121333 Senior Thesis Presentation Tracy Lo April 16, 2003 Construction Management
Recommend
More recommend
