HD WOODSON SENIOR HIGH SCHOOL WASHINGTON, DC PENN STATE ARCHITECTURAL ENGINEERING THESIS

HD WOODSON SENIOR HIGH HD WOODSON SENIOR HIGH SCHOOLSCHOOL

WASHINGTON, DCWASHINGTON, DC

PENN STATE ARCHITECTURAL ENGINEERING PENN STATE ARCHITECTURAL ENGINEERING THESIS THESIS

NEAL DIEHL | CONSTRUCTION PROJECT MANAGEMENTNEAL DIEHL | CONSTRUCTION PROJECT MANAGEMENTDR. DAVID RILEY - ADVISORDR. DAVID RILEY - ADVISOR

GREEN ROOFGREYWATER

SYSTEMCURRENT DESIGN

ALTERNATE OPTIONS

CONCLUSION

CURRENT DESIGN

PROPOSED SPLICE

HD WOODSON SENIOR HIGH SCHOOLNEAL DIEHL │CONSTRUCTION PROJECT MANAGEMENT

INTRODUCTION


ALTERNATIVE EXTERIOR WALL ASSEMBLY

BENEFITS & COSTS

STRUCTURAL BREADTH

OPTIMIZE VALUE ENGINEERING

LEED- RISK TO VE ?

PROJECT BACKGROUND

HD Woodson Senior HS will replace the former facility with a technology focused building ,utilizing the STEM design concept

S

T

E

M

cience

echnology

ngineering

ath

SMART Boards

ALTERNATIVE STEEL TRUSS CONSTRUCTION

DC Public Schools, Office of Public Education Facilities Modernization first totally new building

230,000 GSF900 Students9th through 12th Grade$ 89 MillionLEED Gold

BENEFITS

GREEN ROOFGREYWATER


ALTERNATE OPTIONS

CONCLUSION

CURRENT DESIGN

PROPOSED SPLICE


INTRODUCTION



BENEFITS


BENEFITS & COSTS

STRUCTURAL BREADTH


LEED- RISK TO VE ?

PROJECT BACKGROUND

HD Woodson Senior HS will replace the former facility with a technology focused building ,utilizing the STEM design concept


GREEN ROOFGREYWATER

SYSTEM


LEED- RISK TO VE ?


OPTIMIZING VALUE ENGINEERING


Overlooking “LEED” design elements during the Value Engineering Process discounts valuable opportunities

LEED SUSTAINABILITY

GREEN ROOFGREYWATER

SYSTEM


LEED- RISK TO VE ?





Constructability

VS

14 LAYERS 5 LAYERS

CostGreen Roof Cost Estimate Reflective EPDM Roofing

$ per Square Foot $ 28.07 $ 4.50 $ per Square Foot Square Feet 45,502 45,502 Square Feet TOTAL $ 1,277,240 $ 204,760 TOTAL Potential Savings 1,072,480

$ 1,277,240

$ 204,760

Potential Estimated Savings $ 1,072,480

GREEN ROOFGREYWATER

SYSTEM


LEED- RISK TO VE ?





Constructability

VS

14 LAYERS 5 LAYERS

CostGreen Roof Cost Estimate Reflective EPDM Roofing

$ per Square Foot $ 28.07 $ 4.50 $ per Square Foot Square Feet 45,502 45,502 Square Feet TOTAL $ 1,277,240 $ 204,760 TOTAL Potential Savings 1,072,480

$ 1,277,240

$ 204,760

Potential Estimated Savings $ 1,072,480

GREEN ROOFGREYWATER

SYSTEM


LEED- RISK TO VE ?





Greywater system expansion based on former Green Roof Capacity and Storm Event Calculations

Proposed additional 20,000 gallon underground tank to maintain storm water capacity

Storm Water Storage Capacity RequirementsStorm Type CF Gallons

2 Year Event 3,540 26,481

15 Year Event 4,656 34,829

Green Roof Capacity and AreasSF Capacity

Green Roof 45,502 6,006 cf (44,928 g)

Controlled by GR 77,150

CF Gallons

1,337 10,000

2,674 20,000

4,011 30,000

5,348 40,000

6,685 50,000

8,022 60,000

20,000 20,000 10 K

GREEN ROOFGREYWATER

SYSTEM


LEED- RISK TO VE ?





Greywater system expansion based on former Green Roof Capacity and Storm Event Calculations

Proposed additional 20,000 gallon underground tank to maintain storm water capacity

Storm Water Storage Capacity RequirementsStorm Type CF Gallons

2 Year Event 3,540 26,481

15 Year Event 4,656 34,829

Green Roof Capacity and AreasSF Capacity

Green Roof 45,502 6,006 cf (44,928 g)

Controlled by GR 77,150

CF Gallons

1,337 10,000

2,674 20,000

4,011 30,000

5,348 40,000

6,685 50,000

8,022 60,000

20,000 20,000 10 K

GREEN ROOFGREYWATER

SYSTEM


LEED- RISK TO VE ?





Value Engineering provides the economic input to the Sustainability Triple Bottom Line


STRUCTURAL BREADTH


Removing the green roof loads provide an opportunity to reduce the size of certain structural steel members

STRUCTURAL BREADTH

Design Loads and ability to downsize considered for a Beam and Girder with removed Green Roof

Cost savings and sustainable attributes of reducing structural steel

Loading with Green Roof

Design Dead Load 30 PSF

Green Roof Load 30 PSF

Roof Live Load 21 PSF

Beam B Reduced from W 24 x 55 to W 21 x 44

Girder A Reduced from W 24 x 68 to W 21 x 55

Beam B Calculations

Factored Load

105.6 PSF

Load 1.003 KLF

Bending Moment

288.9 kip-ft.

Allowed (AISC)

503 (57%)


STRUCTURAL BREADTH



STRUCTURAL BREADTH


Reductions of steel roof members under the 45,000 sf of roof area would be possible


Design Deal Load 30 PSF





Beam B Reduced Load Calculations

Factored Load 69.6 PSF

Load 0.661 KLF

Bending Moment

190.4 kip-ft.

Bending Moment

(maintain 57%)299 kip-ft.

W 21 x 44 (AISC) 358 kip- ft.


STRUCTURAL BREADTH



STRUCTURAL BREADTH


Reductions of steel roof members under the 45,000 sf of roof area would be possible


Design Deal Load 30 PSF





Beam B Reduced Load Calculations

Factored Load 69.6 PSF

Load 0.661 KLF

Bending Moment

190.4 kip-ft.

Bending Moment

(maintain 57%)299 kip-ft.

W 21 x 44 (AISC) 358 kip- ft.




Originally designed exterior walls were oversized masonry panels or bricks with CMU back up

CURRENT DESIGN

ALTERNATE OPTIONS


BENEFITS & COSTS

Exterior Wall Assembly Options

Cost/SFEstimate

d Cost

Cost Differenc

e

Duration (days)

CMU Backup

$ 12.94 $ 802,927 - 90




Metal Stud Crete system accelerates the schedule, provides increased efficiency at higher assembly cost

CURRENT DESIGN

ALTERNATE OPTIONS


BENEFITS & COSTS


Cost/SF

Estimated Cost

Cost Differenc

e

Duration (days)

CMU Backup $ 12.94 $ 802,927 - 90

Metal Stud Crete

$ 34.40 $ 2,134,520 $ 1,331,593 17




Site built Metal Stud Walls provide slight schedule acceleration and other advantages

CURRENT DESIGN

ALTERNATE OPTIONS


BENEFITS & COSTS


Cost/SF

Estimated Cost

Cost Differenc

e

Duration (days)

CMU Backup $ 12.94 $ 802,927 - 90

Metal Stud Crete

$ 34.40 $ 2,134,520 $ 1,331,593 17

Metal Stud Walls

$ 28.00 $ 1.737,400 $ 934,473 60

-Flexibility for changes-Little to no lead time




Metal Stud Crete assembly provides over two month acceleration and positive impact on other systems

CURRENT DESIGN

ALTERNATE OPTIONS


BENEFITS & COSTS


Cost/SF

Estimated Cost

Cost Differenc

e

Duration (days)

CMU Backup $ 12.94 $ 802,927 - 90

Metal Stud Crete

$ 34.40 $ 2,134,520 $ 1,331,593 17

Metal Stud Walls

$ 28.00 $ 1.737,400 $ 934,473 60

Electrical Rough in CMU vs. Metal stud walls

CMU Walls (EMT + Wire)

Studs (MC Cable)

10’ RI, box and support assembly

$ 16.50 $ 8.00

Labor Hours 1.5 1




Trusses spanning gymnasium were fabricated in Delmar, DE and transported to the site in one piece

CURRENT DESIGN

PROPOSED SPLICE


BENEFITS -Over 100 feet

-Supporting Floor and Roof Loads

- Requires Permitting in each state travelled




Trusses spanning gymnasium were fabricated in Delmar, DE and transported to the site in one piece

CURRENT DESIGN

PROPOSED SPLICE

BENEFITS


-Over 100 feet

-Supporting Floor and Roof Loads

- Requires Permitting in each state travelled




Two options were considered when looking at possible splice locations

CURRENT DESIGN

PROPOSED SPLICE


BENEFITS

Welded flanges – Moment resistance in Webs




Two options were considered when looking at possible splice locations

CURRENT DESIGN

PROPOSED SPLICE


BENEFITS

Welded flanges – Moment resistance in Webs




Investigating the possibility of splicing the truss many advantages and disadvantages were found

CURRENT DESIGN

PROPOSED SPLICE

BENEFITS


-Reduce Shipping by $50 to $75 per ton per mile

- Fewer Permits and escort vehicles required (length requirements)

- Increased duration of Steel Erection

- Increased risk for Residual Stresses

- Transport still limited by height

- Removing a process from controlled Environment




Investigating the possibility of splicing the truss many advantages and disadvantages were found

CURRENT DESIGN

PROPOSED SPLICE

BENEFITS


-Reduce Shipping by $50 to $75 per ton per mile

- Fewer Permits and escort vehicles required (length requirements)

- Increased duration of Steel Erection

- Increased risk for Residual Stresses

- Transport still limited by height

- Removing a process from controlled Environment

GREEN ROOFGREYWATER


ALTERNATE OPTIONS

CONCLUSION

CURRENT DESIGN

PROPOSED SPLICE




BENEFITS & COSTS

STRUCTURAL BREADTH


LEED- RISK TO VE ?

PROJECT BACKGROUND

Questions ?


BENEFITS

Date post:	22-Jan-2016
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HD WOODSON SENIOR HIGH SCHOOL WASHINGTON, DC PENN STATE ARCHITECTURAL ENGINEERING THESIS

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