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Craig OwsianyArchitectural Engineering – Construction Management
STEM BuildingHagerstown Community College
Hagerstown, Maryland 21742
Science Technology Engineering Mathematics BuildingSTEM Building
Hagerstown Community CollegeHagerstown, Maryland 21742
Outline
o Overview
o Analysis I: Mat Slab Redesign
o Analysis II: Green Roof Redesign
o Analysis III: Curtain Wall Redesign
o Conclusion/Findings
o Acknowledgments
o Questions Southwest View South View Southeast View
•5 Floors•Size: 62, 840 SF•Cost: $15.6 M•Duration: 18 Months
Typical Lab Typical Floor Plan Energy Lab
Craig OwsianyArchitectural Engineering – Construction ManagementScience Technology Engineering Mathematics Building
STEM BuildingHagerstown Community College
Hagerstown, Maryland 21742
Outline
o Overview
o Analysis I: Mat Slab Redesign
o Analysis II: Green Roof Redesign
o Analysis III: Curtain Wall Redesign
o Conclusion/Findings
o Acknowledgments
o Questions
Background Solutions Goal
Craig OwsianyArchitectural Engineering – Construction Management
STEM BuildingHagerstown Community College
Hagerstown, Maryland 21742
Outline
o Overview
o Analysis I: Mat Slab Redesign
o Analysis II: Green Roof Redesign
o Analysis III: Curtain Wall Redesign
o Conclusion/Findings
o Acknowledgments
o Questions
•Blasting•Non Competent Rock
•Reduce Cost Impact•Maintain Schedule•Ensure Structural Integrity
Analysis I: Mat Slab Redesign Structural Breadth
Structural Analysis Structural Calculations Findings
Craig OwsianyArchitectural Engineering – Construction ManagementAnalysis I: Mat Slab Redesign
Structural Breadth
STEM BuildingHagerstown Community College
Hagerstown, Maryland 21742
Outline
o Overview
o Analysis I: Mat Slab Redesign
o Analysis II: Green Roof Redesign
o Analysis III: Curtain Wall Redesign
o Conclusion/Findings
o Acknowledgments
o Questions
• Sum Live and Deal Loads•Compare Against Design Load
Design>Actual=No Redesign
Design<Actual=Redesign Required
Total (lbs)
Compacted Soil (4') 496,100
Concrete-Normal Weight (5") 20,834
Concrete-Normal Weight (10") 728,625
Concrete-Normal Weight (12") 498,075
Concrete-Normal Weight (18") 56,306
Concrete-Normal Weight (20") 34,531
Concrete-Light Weight (4 1/4") 251,828
Beams 30,525
Stairs (20") 305,723
Curtain Wall & Metal Panels 23,460
Brick Veneer 92,576
Green Roof 132,688
Ceiling 28,604
Partitions 56,038
HVAC & Plumbing 57,208
Cistern 31,000
Total 2,844,119
Dead LoadsTotal (lbs)
Corridors 3rd Floor & Below 80,990
Corridors Above 3rd Floor 97,188
Classrooms 105,240
Stairs 122,289
Total 405,706
Live Loads
Dead Loads Total 2,844,119
Live Loads Total 405,706
Extended Foundation Wall Loads 139,750
Dead+Live 3,249,826
Dead +Live+Extended 3,389,576
Percentage Increase 4.12%
Total Load (P) 3,389,576
Area (A) 1,128
P/A (lbs/sf) 3,006
• Mat slab designed for 8000 psf•Actual Load = 38% of Design Load
• 10-15% load increase would require further investigation
Cost Impact Savings
Craig OwsianyArchitectural Engineering – Construction ManagementAnalysis I: Mat Slab Redesign
Structural Breadth
STEM BuildingHagerstown Community College
Hagerstown, Maryland 21742
Outline
o Overview
o Analysis I: Mat Slab Redesign
o Analysis II: Green Roof Redesign
o Analysis III: Curtain Wall Redesign
o Conclusion/Findings
o Acknowledgments
o Questions
Materials LF $/LF Sq. Ft. $/Sq. Ft. CY $/CY Duration $/Crew TotalFormwork-Lumber 240 0.3 72.00$ Formwork-Plywood 755 1.41 1,064.55$ Lean Concrete 208.8 80 16,704.00$ Backfill -$ Crew 1 960 960.00$ Total 18,800.55$
GC Solution
Materials LF $/LF Sq. Ft. $/Sq. Ft. CY $/CY Duration $/Crew TotalFormwork-Lumber 480 0.3 144.00$ Formwork-Plywood 426 1.41 600.66$ Lean Concrete 20.9 80 1,672.00$ Normal Weight Concrete 34.3 92 3,155.60$ Backfill -$ Crew 2 960 1,920.00$ Total 7,492.26$
Proposed Solution
Materials LF $/LF Sq. Ft. $/Sq. Ft. CY $/CY Duration $/Crew TotalConcrete 299.3 80 23,944.00$ Total 23,944.00$
Triad Solution Cost
Solution CostTriad 23,944.00$ GC 18,800.55$ Proposed 7,492.26$
Totals
Total Savings = $16k
Background Background Redesign
Craig OwsianyArchitectural Engineering – Construction ManagementAnalysis II: Green Roof Redesign
Mechanical Breadth
STEM BuildingHagerstown Community College
Hagerstown, Maryland 21742
Outline
o Overview
o Analysis I: Mat Slab Redesign
o Analysis II: Green Roof Redesign
o Analysis III: Curtain Wall Redesign
o Conclusion/Findings
o Acknowledgments
o Questions
• Conventional Green Roof • 3” Low Profile•Architectural Facets • Negligible Thermal Value • Minimal Educational Value
SF %Aggregate/Stone Gravel 308 15.2%Concrete Tile Pavers 542 26.8%Wood Panel Pavers 396 19.6%Indegenous Vegetation 776 38.4%Total SF 2022 100.0%
Green Roof Takeoffs
• LiveRoof System• 6” High Profile• Added Thermal Value • Higher Educational Value
Conventional Green Roof LiveRoof System Benefits
Craig OwsianyArchitectural Engineering – Construction ManagementAnalysis II: Green Roof Redesign
Mechanical Breadth
STEM BuildingHagerstown Community College
Hagerstown, Maryland 21742
Outline
o Overview
o Analysis I: Mat Slab Redesign
o Analysis II: Green Roof Redesign
o Analysis III: Curtain Wall Redesign
o Conclusion/Findings
o Acknowledgments
o Questions
• Faster Installation• Low Maintenance• Immediate Vegetation
Cost Impact Payback Period
Craig OwsianyArchitectural Engineering – Construction ManagementAnalysis II: Green Roof Redesign
Mechanical Breadth
STEM BuildingHagerstown Community College
Hagerstown, Maryland 21742
Outline
o Overview
o Analysis I: Mat Slab Redesign
o Analysis II: Green Roof Redesign
o Analysis III: Curtain Wall Redesign
o Conclusion/Findings
o Acknowledgments
o Questions
$ Markup $ Maintenance Savings Payback Period (years)Conventional Low-LiveRoof Low 24264 1,920.90$ 12.6Conventional High-LiveRoof High 34374 3,639.60$ 9.4Conventional Low-LiveRoof High 46506 1,617.60$ 28.8
Payback Period
• Payback period is 28.8 years for maintenance cost alone.
SF $/SF Total $Conventional Low Profile 2022 14.00$ 28,308.00$ Conventional High Profile 2022 20.00$ 40,440.00$
LiveRoof Low Profile 2022 26.00$ 52,572.00$ LiveRoof High Profile 2022 37.00$ 74,814.00$
Low Profile Markup 2022 12.00$ 24,264.00$
High Profile Markup 2022 17.00$ 34,374.00$ Conventional Low to Live Roof High 2022 23.00$ 46,506.00$
SF $/SF Total $Conventional Low Profile 2022 1.00$ 2,022.00$ Conventional High Profile 2022 2.00$ 4,044.00$ LiveRoof Low Profile 2022 0.05$ 101.10$
LiveRoof High Profile 2022 0.20$ 404.40$
Low Profile Savings 2022 0.95$ 1,920.90$ High Profile Savings 2022 1.80$ 3,639.60$ Conventional Low to Live Roof High 2022 0.80$ 1,617.60$
Estimating Takeoffs-Upfront
Estimating Takeoffs-Maintenance
Thermal Calculations Thermal Calculations
Craig OwsianyArchitectural Engineering – Construction ManagementAnalysis II: Green Roof Redesign
Mechanical Breadth
STEM BuildingHagerstown Community College
Hagerstown, Maryland 21742
Outline
o Overview
o Analysis I: Mat Slab Redesign
o Analysis II: Green Roof Redesign
o Analysis III: Curtain Wall Redesign
o Conclusion/Findings
o Acknowledgments
o Questions
Conventional Green Roof Heat Loss Current Green Roof Heat Loss Proposed Green Roof Heat Loss
Craig OwsianyArchitectural Engineering – Construction ManagementAnalysis II: Green Roof Redesign
Mechanical Breadth
STEM BuildingHagerstown Community College
Hagerstown, Maryland 21742
Outline
o Overview
o Analysis I: Mat Slab Redesign
o Analysis II: Green Roof Redesign
o Analysis III: Curtain Wall Redesign
o Conclusion/Findings
o Acknowledgments
o Questions
Materials Sq. Ft. R-Value Summer: Q=A(To-Ti)/R Winter: Q=A(Ti-To)/RModified SBS Cap Sheet 2022.00 0.70Modified SBS Base-Ply Sheet 2022.00 0.70R-30 Insulation 2022.00 30.00Decking/Concrete 2022.00 0.43Conventional Roof Total (BTU/hr) 2022.00 31.83 101.66 2223.72
Conventional Roof
Materials Sq. Ft. Lb./Sq. Ft. R-Value Conventional Roof R-Value Total R-Value Summer: Q=A(To-Ti)/R Winter: Q=A(Ti-To)/RStone Aggregate 308.00 31.25 0.15 31.83 31.98 15.41 337.14Wood Pavers 396.00 6.13 2.13 31.83 33.95 18.66 408.25Concrete Pavers 542.00 23.00 0.65 31.83 32.48 26.70 584.143" Conventional Green Roof 776.00 23.44 1.43 31.83 33.25 37.34 816.84
VegetationSoilFilter FabricDrainage ChannelRoot Barrier
Architectural Roof Total 98.12 2146.37
Current Green RoofMaterials Sq. Ft. R-Value Conventional Roof R-Value Total R-Value Summer: Q=A(To-Ti)/R Winter: Q=A(Ti-To)/R6" LiveRoof System 2022.00 2.85 31.83 34.68 93.30 2040.95
Prevegetated ModulesRoot Barrier
All Green Roof Total 93.30 2040.95
Proposed Green Roof System
• Low Profile Green Roof• Concrete Pavers• Wood Pavers• Stone Aggregate
• 100% LiveRoof System• High Profile
• 8.2% reduction from conventional roof• 5.0% reduction from current green roof
Justification Educational Factor Educational Factor
Craig OwsianyArchitectural Engineering – Construction ManagementAnalysis II: Green Roof Redesign
Mechanical Breadth
STEM BuildingHagerstown Community College
Hagerstown, Maryland 21742
Outline
o Overview
o Analysis I: Mat Slab Redesign
o Analysis II: Green Roof Redesign
o Analysis III: Curtain Wall Redesign
o Conclusion/Findings
o Acknowledgments
o Questions
• Alternate Energy Program• Mechanical Engineering • Thermal Cameras
• Heat Sensors
Background Redesign Goal
Craig OwsianyArchitectural Engineering – Construction Management
Analysis III: Curtain Wall Redesign
STEM BuildingHagerstown Community College
Hagerstown, Maryland 21742
Outline
o Overview
o Analysis I: Mat Slab Redesign
o Analysis II: Green Roof Redesign
o Analysis III: Curtain Wall Redesign
o Conclusion/Findings
o Acknowledgments
o Questions
• Stick Built Curtain Wall• Approximately 1/3 of Building Envelope• 9260 SF• Lengthy Installation Time• Site Congestion• Short Lead Time
• Unitized Curtain Wall System• Short Installation Time• Shakeout Not Required• Higher Quality Seals• Long Lead Time
• Reduce curtain wall installation time• Achieve earlier water tight date• Reduce over all schedule
Schedule Schedule Acceleration
Craig OwsianyArchitectural Engineering – Construction Management
Analysis III: Curtain Wall Redesign
STEM BuildingHagerstown Community College
Hagerstown, Maryland 21742
• Original Duration: 40 Days
Outline
o Overview
o Analysis I: Mat Slab Redesign
o Analysis II: Green Roof Redesign
o Analysis III: Curtain Wall Redesign
o Conclusion/Findings
o Acknowledgments
o Questions
• New Duration: 20 Days
Stick Built System1. Deliver Materials2. Shakeout3. Install Sills and Jambs4. Install Mullions5. Glaze6. Caulk
Unitized System1. Deliver Modules2. Set Module3. Caulk
Lead Time Installation Time
Craig OwsianyArchitectural Engineering – Construction Management
Analysis III: Curtain Wall Redesign
STEM BuildingHagerstown Community College
Hagerstown, Maryland 21742
Outline
o Overview
o Analysis I: Mat Slab Redesign
o Analysis II: Green Roof Redesign
o Analysis III: Curtain Wall Redesign
o Conclusion/Findings
o Acknowledgments
o Questions
Week Stick Built System Unitized System
1-6 Obtain materials Obtain materials
7 Fabricate/Deliver Fabricate/Deliver
8 Fabricate/Deliver Fabricate/Deliver
9-12 Fabricate/Deliver
Week Stick Built System Unitized System
1 Deliver/Frame Deliver/Install/Caulk
2 Deliver/Frame/Dimension Deliver/Install/Caulk
3 Deliver/Frame/Dimension Deliver/Install/Caulk
4 Deliver/Frame/Dimension/Glaze/Caulk Deliver/Install/Caulk
5 Deliver/Frame/Dimension/Glaze/Caulk
6 Deliver/Frame/Dimension/Glaze/Caulk
7 Glaze/Caulk
8 Glaze/Caulk
• Stick Built: 8 Weeks• Unitized: 12 Weeks
• Stick Built: 8 Weeks• Unitized: 4 Weeks
Sequencing – Areas of Concern Resequencing
Craig OwsianyArchitectural Engineering – Construction Management
Analysis III: Curtain Wall Redesign
STEM BuildingHagerstown Community College
Hagerstown, Maryland 21742
Outline
o Overview
o Analysis I: Mat Slab Redesign
o Analysis II: Green Roof Redesign
o Analysis III: Curtain Wall Redesign
o Conclusion/Findings
o Acknowledgments
o Questions
• Reduced Curtain Wall Installation
• Earlier Water Tight Date
• Finishes
• MEP Rough Ins
• Begin MEP rough ins 1 week early.
• Stack MEP rough ins and finishes on 3rd, 4th and 5th floors.
• Sync water tight date and completion of rough ins.
Accelerated Schedule
Craig OwsianyArchitectural Engineering – Construction Management
Analysis III: Curtain Wall Redesign
STEM BuildingHagerstown Community College
Hagerstown, Maryland 21742
Outline
o Overview
o Analysis I: Mat Slab Redesign
o Analysis II: Green Roof Redesign
o Analysis III: Curtain Wall Redesign
o Conclusion/Findings
o Acknowledgments
o Questions
• Overall schedule reduced by 44 days
Analysis I Analysis II Analysis III
Craig OwsianyArchitectural Engineering – Construction Management
Analysis III: Curtain Wall Redesign
STEM BuildingHagerstown Community College
Hagerstown, Maryland 21742
Outline
o Overview
o Analysis I: Mat Slab Redesign
o Analysis II: Green Roof Redesign
o Analysis III: Curtain Wall Redesign
o Conclusion/Lessons Learned
o Acknowledgments
o Questions
Mat Slab Redesign
• Current mat slab will support additional load
• Redesign not required
• Further attention given at a 10-15% load increase
Green Roof Redesign
• Cannot place an R-Value on living organisms
• Using an R-Value alone will not produce accurate heat transfer results
• Offers great value as an education tool
Curtain Wall Redesign
• 44 days saved
• Higher quality product
• Resequencing, not accelerating the schedule
• “We are sequencing trades in a manner to optimize productivity for all trades involved.”
Acknowledgements Acknowledgements Acknowledgements
Craig OwsianyArchitectural Engineering – Construction Management
Analysis III: Curtain Wall Redesign
STEM BuildingHagerstown Community College
Hagerstown, Maryland 21742
Outline
o Overview
o Analysis I: Mat Slab Redesign
o Analysis II: Green Roof Redesign
o Analysis III: Curtain Wall Redesign
o Conclusion/Findings
o Acknowledgments
o Questions
General Contractor• Greg Ramirez, Senior Project Manager• Eric Osborne, Senior Superintendent• Brett Robinson, Field Engineer
Owner• Dawn Baker, Facilities Project
Coordinator• Robert Spong, Facilities Management
and Planning Director• Gerard Rath, Owner Rep.
Architect• Mark Merolla, Architect
Structural Engineer• Chris Johnson, Structural Engineer
Penn State AE Faculty• Bob Holland• Rob Leicht
Questions
Craig OwsianyArchitectural Engineering – Construction Management
Analysis III: Curtain Wall Redesign
STEM BuildingHagerstown Community College
Hagerstown, Maryland 21742
Outline
o Overview
o Analysis I: Mat Slab Redesign
o Analysis II: Green Roof Redesign
o Analysis III: Curtain Wall Redesign
o Conclusion/Findings
o Acknowledgments
o Questions
Questions?