SLIDE 1
DAVID KNAPP STRUCTURAL OPTION SPRING 2003 OAK BROOK POINTE Six - - PowerPoint PPT Presentation
DAVID KNAPP STRUCTURAL OPTION SPRING 2003 OAK BROOK POINTE Six - - PowerPoint PPT Presentation
DAVID KNAPP STRUCTURAL OPTION SPRING 2003 OAK BROOK POINTE Six story office building Chicago suburb 250,000 ft 2 total Contents Relevant Building Depth: Structural Steel Background Loads Gravity Design Design Team Mechanical
SLIDE 2
SLIDE 3
David Knapp Oak Brook Pointe
Contents
Relevant Building Background
Design Team Architecture Structure Mechanical System
Breadth: Green Roof
Benefits Design
Breadth: Mechanical System
Roof Adjustments Floor Adjustments
Depth: Structural Steel
Loads Gravity Design Mechanical Integration Lateral System Final Design Cost
Conclusions Acknowledgements Questions
SLIDE 4
David Knapp Oak Brook Pointe
Contents
Relevant Building Background
Design Team Architecture Structure Mechanical System
Breadth: Green Roof
Benefits Design
Breadth: Mechanical System
Roof Adjustments Floor Adjustments
Depth: Structural Steel
Loads Gravity Design Mechanical Integration Lateral System Final Design Cost
Conclusions Acknowledgements Questions
SLIDE 5
David Knapp Oak Brook Pointe
Owner – Hines Architect – Wright Architects, LTD Structural Engineer – Halvorson & Kaye Structural Engineers, PC MEPFP Engineer – Cosentini Associates General Contractor & CM – Turner Construction Civil Consultants – SDI Consultants, LTD
Design Team
SLIDE 6
David Knapp Oak Brook Pointe
Architecture
700 Commerce Dr. Oak Brook, IL 120° L-shape Footprint, stepped wing ends Award-winning pre-cast w/ blue reflective glass exterior $21 million project cost, $16.5 million for building
SLIDE 7
David Knapp Oak Brook Pointe
Architecture
Typical floor plan
SLIDE 8
David Knapp Oak Brook Pointe
Initial Structural System
Gravity System – Two-way reinforced concrete flat slab with drop panels Lateral System – continuously poured slabs and columns forming slab frames Typical Bay Strip – 30’ wide with 35’ side bays with a 30’ center “corridor” bay Foundations – Square spread footings, basement floor is slab on grade Concrete – Normal weight with 28-day compressive strength of 6,000 psi at columns and walls; 4,000 psi everywhere else
SLIDE 9
David Knapp Oak Brook Pointe
Initial Structural System
Typical structural layout
SLIDE 10
David Knapp Oak Brook Pointe
Initial Mechanical System
Six rooftop packaged units 12” deep main supply loop with VAV fan boxes 2 29,000 CFM exhaust fans in basement
RTU 1 & 4 RTU 2 & 3 RTU 5 & 6 SERVICE Floor 5 Floors 1-4 Floors 1-4 EVAPORATOR FAN: Air flow (CM) 22,000 42,000 42,000 Fan RPM 1060 880 880 EXHAUST FAN: Air flow (CM) 22,000 42,000 42,000 Fan RPM 650 610 610 CONDESSOR FAN: Air flow (CM) 40,800 63,200 63,200 COMPRESSOR DATA: RPM 3450 3450 3450 EVAPORATOR COIL: Total cooling load (BTU) 806,000 1,530,000 1,530,000 Sensible cooling load (BTU) 589,000 1,164,000 1,164,000 Entering D.B. Temp. (°F) 83 80 80 Entering W.B. Temp. (°F) 66 66 66 Leaving D.B. Temp. (°F) 55 55 55 Ambient D.B. Temp (°F) 94 94 94 ELECTRIC HEATER: kW 90 190 190 TOTAL WEIGHT (lbs) 11,000 17,000 17,000
24x12 36x12 30x12 76x14 54x20 76x14 58x12 44x12 36x12 30x12 36x12 1680 CFM Fan Box 1680 CFM Fan Box 1400 CFM Fan Box 1530 CFM Fan Box 1530 CFM Fan Box 144x18 Return Air Duct
Typical mechanical plan
SLIDE 11
David Knapp Oak Brook Pointe
Contents
Relevant Building Background
Design Team Architecture Structure Mechanical System
Breadth: Green Roof
Benefits Design
Breadth: Mechanical System
Roof Adjustments Floor Adjustments
Depth: Structural Steel
Loads Gravity Design Mechanical Integration Lateral System Final Design Cost
Conclusions Acknowledgements Questions
SLIDE 12
David Knapp Oak Brook Pointe
Green Roof
A green roof is a system
- f filtering layers and
growth layers, characterized by soils, grasses, shrubs, even trees, that substitutes for conventional flat roof water-proofing. Popular in Europe In the process of becoming mandatory in Chicago
SLIDE 13
David Knapp Oak Brook Pointe
Green Roof - Benefits
Reduced Urban Heat Island Effect Effective management and utilization of stormwater Clean and oxigenated air Reduced heat and noise translation through roof Creation of additional usable space and property value for the building tenants
Infrared photo of U.H.I.E.
SLIDE 14
David Knapp Oak Brook Pointe
Green Roof - Design
Products by HydroTech USA Two main types:
Extensive Garden Roof Intensive Garden Roof
Two alternatives:
Extensive Garden Roof w/ public
access intensive system park area
Emergency egress requirements
Non-public extensive system over
the entire roof
SLIDE 15
David Knapp Oak Brook Pointe
Green Roof - Cost
Initial Ballasted Membrane Roof: $250,000
- ALT. 2
EXTENSIVE INTENSIVE EXTENSIVE AREA (ft2) 30,800 6,675 37,475 SYSTEM $215,600 $146,850 $262,325 PLANTS $61,600 $233,625 $74,950 INSTALLATION $154,000 $86,775 $187,375 GUARDRAIL
- $10,500
- BUILDING
- $16,500
- TOTALS
$431,200 $494,250 $524,650 OVERALL TOTAL $524,650 MAINTAINENCE $46,200/yr $10,000/yr $56,200/yr
- ALT. 1
$925,450
SLIDE 16
David Knapp Oak Brook Pointe
Contents
Relevant Building Background
Design Team Architecture Structure Mechanical System
Breadth: Green Roof
Benefits Design
Breadth: Mechanical System
Roof Adjustments Floor Adjustments
Depth: Structural Steel
Loads Gravity Design Mechanical Integration Lateral System Final Design Cost
Conclusions Acknowledgements Questions
SLIDE 17
David Knapp Oak Brook Pointe
Mechanical Redesign - Roof
Red: Existing design Blue: Proposed design
SLIDE 18
David Knapp Oak Brook Pointe
Mechanical Redesign - Roof
Initial RTU configuration Proposed RTU configuration
SLIDE 19
David Knapp Oak Brook Pointe
Mechanical Redesign - Floors
30x13 30x13 24x13 76x14 54x20 24x13 24x13 1680 CFM Fan Box 1400 CFM Fan Box 1530 CFM Fan Box 1530 CFM Fan Box 144x18 Return Air Duct 1680 CFM Fan Box 54x20 76x14 24x13 30x13 30x13
Proposed mechanical layout
SLIDE 20
David Knapp Oak Brook Pointe
Contents
Relevant Building Background
Design Team Architecture Structure Mechanical System
Breadth: Green Roof
Benefits Design
Breadth: Mechanical System
Roof Adjustments Floor Adjustments
Depth: Structural Steel
Gravity Design Mechanical Integration Lateral System Final Design Cost
Conclusions Acknowledgements Questions
SLIDE 21
David Knapp Oak Brook Pointe
Steel – Gravity Design
Loads the same except:
Dead load = 80 psf Green roof system:
Extensive = 35 psf Intensive = 120 psf
2” Lok-floor composite deck with 3” LW concrete cover Composite beam and column design by RAMSteel
LOCATION B - 2 2 - 4 4 - R Exterior W12x72 W12x53 W12x40 Interior W12x106 W12x72 W12x53
COLUMN SCHEDULE
SLIDE 22
David Knapp Oak Brook Pointe
Steel – Gravity Design
Gravity framing layout
SLIDE 23
David Knapp Oak Brook Pointe
Steel – Mechanical Integration
AVOID BUILDING HEIGHT INCREASE
Increases total square footage of exterior cladding Increases length of vertical elements such as stairs, elevators, utility shafts, and columns Increases lateral loading and their respective resisting systemsIncreases volume of conditioned air
GOAL: MAINTAIN 3’-1” PLENUM
SLIDE 24
David Knapp Oak Brook Pointe
Steel – Mechanical Integration
VIERENDEEL TRUSSES
Castellated beams too deep Vulcraft composite joists too conservative WT chords, LL angle web members Girders increased to W24x55 for framing
SLIDE 25
David Knapp Oak Brook Pointe
Steel – Mechanical Integration
GIRDER OPENINGS
Large opening – cantilever support Wide opening – Reinforced web opening
SLIDE 26
David Knapp Oak Brook Pointe
Steel – Lateral System
Shear walls (green) surrounding elevator core Steel moment frames (blue) to assist with torsion
SLIDE 27
David Knapp Oak Brook Pointe
Steel – Lateral System
Shear walls reinforcement:
- #5 @ 12” horizontal
- 26 - #9 bars for flexure
SLIDE 28
David Knapp Oak Brook Pointe
Steel – Final Design
Final proposed structural plan
SLIDE 29
David Knapp Oak Brook Pointe
Steel - Cost
Initial Superstructure: $4,700,000
ITEM MATERIAL LABOR EQUIPMENT TOTAL Steel Framing $735,000 $207,360 $63,600 $1,005,960
- V. Trusses
$60,368 $24,538 $7,526 $92,432 Shear Studs $17,468 $55,611 $7,130 $80,208 Fireproofing $159,250 $150,000 $30,000 $339,250 Steel Deck $857,500 $231,000 $15,000 $1,103,500 Concrete Slabs $202,860 $201,600 $66,000 $470,460 Concrete Walls $84,280 $103,200 $21,500 $208,980 Mat Foundation $10,290 $6,600 $100 $16,990 Spread Footings $40,572 $33,120 $345 $74,037 SUPERSTRUCTURE TOTAL $3,391,817
SLIDE 30
David Knapp Oak Brook Pointe
Contents
Relevant Building Background
Design Team Architecture Structure Mechanical System
Breadth: Green Roof
Benefits Design
Breadth: Mechanical System
Roof Adjustments Floor Adjustments
Depth: Structural Steel
Gravity Design Mechanical Integration Lateral System Final Design Cost
Conclusions Acknowledgements Questions
SLIDE 31
David Knapp Oak Brook Pointe
Conclusions
GREEN ROOF
Despite higher costs, ecological impacts are very important, and there either green roof alternative is suggested.
STRUCTURAL SYSTEM
The proposed steel system would save $1.3M and would be completed earlier, and therefore is suggested
MECHANICAL SYSTEM
Any mechanical changes were made to benefit the green roof and structural redesign, and would not be needed if those alternatives were not chosen
SLIDE 32
David Knapp Oak Brook Pointe
Thank You
Faculty
- Dr. Thomas Boothby
- Jonathan Dougherty
- Dr. Louis Geschwindner
- Dr. Linda Hanagan
- Dr. Moses Ling
- Dan Mattern
- Dr. Ali Memari
- Dr. Kevin Parfitt
Professionals
- Joe Krolopp
- Lynne McMillion
- Josh Munson
- David Samuelson
- Paul Stout
- Jim Swanson
Peers
- Amy Graver
- Jon Jadico
- Brad Koehler
- Melissa Rosol
- Andrew Tech
Family and Friends
- My mother and father
- All my brothers and their families
- Alison Killian
- Jason Kelso
- The good people at Kinkos
SLIDE 33
QUESTIONS?
SLIDE 34
David Knapp Oak Brook Pointe
Reinforcement Details
SLIDE 35
David Knapp Oak Brook Pointe
Truss Model and Loading
SLIDE 36
David Knapp Oak Brook Pointe
Green Roof Components
- Roof Membrane
- Membrane Protection
- Insulation
- Drainage
- Filter
- Soil
- Vegetation
SLIDE 37
David Knapp Oak Brook Pointe
Structural Steel
PROS
Fast and easy construction Lighter dead loads Composite design with slab lightens beams
CONS
More lead time, CM preparation Deeper plenum
SLIDE 38
David Knapp Oak Brook Pointe
Structural Loads
DESIGN GRAVITY LOADS DESIGN WIND LOADS TYPICAL FLOOR: LATERAL LOAD ON STRUCTURAL FRAME 25 PSF ROOF UPLIFT 15 PSF SUPERIMPOSED DEAD LOADS - ROOF OVERHANG 40 PSF
- MEP. CEILING, ETC.
10 PSF PARTITIONS 20 PSF CODE MINIMUM WIND LOADS BASED ON THE FOLLOWING: BASIC WIND SPEED, V=75 MPH LIVE LOAD - WIND LOAD IMPORTANCE FACTOR, I=1.0 OFFICE AREA 80 PSF** WIND EXPOSURE (TYPICAL) = B CORRIDOR, STAIR, LOBBY 100 PSF WIND DESIGN PRESSURE, P, VARIES WITH BLDG. HEIGHT, (**REDUCED PER CODE SECT. 1608.0 USE MAXIMUM VALUE OF 25 PSF FOR ENTIRE HEIGHT FOR FLOOR AND COLUMN DESIGN) EARTHQUAKE DESIGN DATA ROOF LEVEL - GENERAL AREAS: CODE MINIMUM DESIGN LOADS BASED ON THE FOLLOWING: SUPERIMPOSED DEAD LOADS - PEAK VELOCITY-RELATED ACCELERATION, Av, 0.5
- MEP. CEILING, ETC.
10 PSF PEAK ACCELERATION, Aa, O.5 ROOFING, INSULATION, ETC. 15 PSF SEISMIC HAZARD EXPOSURE GROUP=GROUP I SEISMIC PERFORMANCE CATEGORY=A LIVE LOAD - SNOW (MINIMUM) 20 PSF+DRIFTING PER CODE SECT. 1612.1, EXCEPTION 3, DESIGN NEED ONLY COMPLY WITH SECT. 1612.3.6.1 CODE MINIMUM SNOW LOADS BASED ON THE FOLLOWING: GROUND SNOW LOAD, Pg=25 PSF FLAT ROOF LOAD, Pf=17.5 PSF SNOW EXPOSURE FACTOR, Ce=0.7 SNOW IMPORTANCE FACTOR, I=1.0 ROOF LEVEL - MECHANICAL EQUIPMENT AREAS: SUPERIMPOSED DEAD LOAD - MEP, CEILING, ETC. BELOW SLAB 10 PSF ROOFING, INSULATION, ETC. 15 PSF LIVE LOAD - (INCLUDES MECH. EQUIPMENT, SCREEN WALLS, SNOW + DRIFTING) 55 PSF OTHER LOADS: LIVE LOAD AT ELEV. MACH. RM. 150 PSF (OR ACTUAL) ROOF TOP SCREEN WALL WEIGHT AS CALCULATED
SLIDE 39
David Knapp Oak Brook Pointe
Steel – Mechanical Integration
GIRDER OPENINGS
Large opening – cantilever support Wide opening – Reinforced web opening Center web openings
A L T . 2
E X T E N S I V E I N T E N S I V E E X T E N S I V E A R E A ( f t 2 ) 3 0 , 8 0 0 6 , 6 7 5 3 7 , 4 7 5 S Y S T E M $ 2 1 5 , 6 0 0 $ 1 4 6 , 8 5 0 $ 2 6 2 , 3 2 5 P L A N T S $ 6 1 , 6 0 0 $ 2 3 3 , 6 2 5 $ 7 4 , 9 5 0 I N S T A L L A T I O N $ 1 5 4 , 0 0 0 $ 8 6 , 7 7 5 $ 1 8 7 , 3 7 5 G U A R D R A I L
- $ 1 0 , 5 0 0
- B U I L D I N G
- $ 1 6 , 5 0 0
- T O T A L S
$ 4 3 1 , 2 0 0 $ 4 9 4 , 2 5 0 $ 5 2 4 , 6 5 0 O V E R A L L T O T A L $ 5 2 4 , 6 5 0 M A I N T A I N E N C E $ 4 6 , 2 0 0 / y r $ 1 0 , 0 0 0 / y r $ 5 6 , 2 0 0 / y r
A L T . 1
$ 9 2 5 , 4 5 0
SLIDE 40
David Knapp Oak Brook Pointe