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1219 Broadway City Buildings Public Service Retail Law Office Commercial Health Care
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20’-0”
Code Information
120’-0”
Site 1219 Broadway, Lubbock, Texas Egress The site falls under the jurisdiction of the city of Lubbock, Texas. Accordingly the proposed devel opment of the site will be governed by the the Building Code of the City of Lubbock. This building code, with some exceptions and amendments, is from the 2003 International Building Code. The codes follow the International Building Code and the city of Lubbock's code of ordinances. The development of the site is classi ed as Business Group B as noted in Chapter Three, Section 304 of International Building Code.
Buildings or portions thereof shall be provided with a means of egress system as required by Chapter Ten of the International Building Code. For example the exit access travel distance for B occupancy in a building or structure with a sprinkler system equipped throughout shall not exceed 300 feet. Fire Containment
The City of Lubbock is listed under the following categorizations: 90 mph Wind Speed 20 Pounds per square foot Ground Snow Load Seismic Design Category: A
The provisions of Chapter Nine of the International Building Code specify where re protection systems are required and the design, installation and operation of re protection systems. For example as noted in Table 910.3 for occupancy group S-1 a vent to area ratio of 1:100 is required to properly vent smoke.
15’-0”
120’-0”
Parking Requirements Drainage Control Parking requirements shall follow in accordance to CB-2 Section 29. For example, shared or leased parking within six hundred feet of the property when businesses circumstance, location of parking spaces and normal hours of use are conductive to both businesses are allowed. Height Restrictions
According to chapter 1, Lubbock Drainage Control Manual, in order to enhance the cities rating in the National Flood Insurance Program, speci c requirements must be met. New construction should have the lowest oor, excluding the basement, elevated to or one foot above the top of the curb of the nearest adjacent street.
The provisions of Chapter Five of the International Building Code control the height and area of structures. For example for B occupancy with a building type II a maximum height of ve stories is required with a maximum area of 37,500 sq. feet. Set Backs The site being located in the Central Business District is governed by CB-2 Sec. 29-19.1.
International Building Code, 2003 City of Lubbock Code of Ordinances Chapter 6 Building and Building Regulations http://codes.franklinlegal.net/lubbock- p/ Central Business District, Broadway. Section 29-19.1. "CB-2" http://planning.ci.lubbock.tx.us/pdf/CB-2.pdf 0
Easements Easements will be in accordance with CB-2 Section 29-19.1. For example on corner lots, the front setback shall be no less than zero (0) feet and no greater than the setback established by the development on the adjacent lot. Other provisions include: (f) Lot width. There shall be no minimum lot width. (g) Lot area. There shall be no lot area requirement. (h) Lot coverage. There shall be no lot coverage requirement. (i) Floor area ratio. There shall be no oor area ratio requirement. (j) Height limit. There shall be no height requirement.
5
10
20
Building 1 Building 1 Core configuration 1 Curtain walls
Building 1 Core configuration 1 Punched openings
Building 1 Core configuration 1 Ribbon windows
Building 1 Core configuration 2 Curtain walls
Building 1 Core configuration 2 Punched openings
Building 1 Core configuration 2 Ribbon windows
Building 2
S C H E M E Building 2 Core configuration 1 Curtain walls
2
Building 2 Core configuration 1 Punched openings
Building 2 Core configuration 1 Ribbon windows
The first core configuration places the core at from heat gain and reduces cooling load. The on the west end of the building and does not s cladding systems used for each iteration, with
Building 2 Core configuration 2 Curtain walls
Building 2 Core configuration 2 Punched openings
Building 2 Core configuration 2 Ribbon windows
the east end of the building. Here, a long and slender core shields the building second core iteration also utilizes an end core strategy, but the core is placed pan the entire west end. The building cladding is based on the three control each customized based on core placement.
Building 3 Building 3 Core configuration 1 Curtain walls
Building 3 Core configuration 1 Punched openings
Building 3 Core configuration 1 Ribbon windows
Building 3 Core configuration 2 Curtain walls
Building 3 Core configuration 2 Punched openings
Building 3 Core configuration 2 Ribbon windows
Building three utilizes a split core system. Core configuration one places one core in the southwest corner of the building and one core in the southeast corner of the building. Because the south end of the building is exposed to direct solar radiation, the combined cores protect this end from fifty percent of the sun’s rays while also shading both east and west ends, and create a large entry and lobby space. The second core configuration places both cores on the west end of the building to block direct solar gain. This configuration also helps to reduce street noise from the corner streets Broadway and Avenue J. The cladding systems are based off the three cladding strategies developed for each scheme.
Analysis
Net present value
Electricity use (kWh/SF) $1,400,000.00
12
$1,200,000.00
10
Mechanical system cost per SF $25.00
$20.00
$1,000,000.00 8 $15.00 $800,000.00 6 $600,000.00
$10.00
4 $400,000.00 $5.00 2
$200,000.00
0
$0.00
Natural gas use (kBtu/SF)
Peak electricity load (W/SF) 10
$0.00
12
Peak building load (SF/ton) 400
9 8
10
350 300
7 8
250
6 5
6
200
4 150
3
4 100
2 2
50
1 0
0
0
15’-0”
120’-0”
25
24
23
22
21
20
19
18
17
16
15
14
25 x 7 13/64" = 15'-0"
1
3
2
5
4
6
8
7
9
11
10
12
13
20’-0”
120’-0”
January 21
8 am
July 21
Vernal Equinox March 20 5:32 p.m.
Summer Solstice June 21 11:28 a.m.
Autumnal Equinox September 23 3:09 p.m.
Winter Solstice December 21 6:38 p.m.
10 am
2 pm
Plumbing Sewer line vent above roof Residental plumbing fixtures
3” - 1” cold water line
Two men’s toilets per floor Two women’s toilets per floor 3” - 1“ hot water line with 2” insulation Hot water boiler 12” sewer line out to city sewer main 6” water in from city main
Electrical
Electrical closets
Building core
Core access door IT closet
Outdoor transformer at ground level
Electrical rack through basement and all floors
Maintenance platform
90’- 0” 28’- 0”
28’- 0”
28’- 0”
Ground Floor & Core Detail D
Lobby Covered entryway
Supply
23’- 0”
Electrical rack Cold Hot Return Sewer
2’ x 2’ Structural concrete columns
Electrical
C
Men
7’- 9”
47’- 0”
Supply air
Men
Electrical closet
Women
Sewer B
Exit stair
Return air 23’- 0”
Electrical
IT Closet Electrical rack Cold water Hot water
IT Closet Commercial space
27’- 0” A
Electrical transformer
1
2
3
HVAC
4
75’- 0”
Storefront windows
23’- 0”
Women
Electrical closet
90’- 0” 28’- 0”
28’- 0”
28’- 0”
Typical Office Floor D
Ribbon windows 23’- 0”
Supply air 2’ x 2’ Structural concrete columns
C
Exit Stair
Return air
Electrical closet Open office space Women B
23’- 0”
A
1
2
3
4
75’- 0”
Men
23’- 0”
IT Closet
Hall
90’- 0” 28’- 0”
28’- 0”
28’- 0”
Residential Floor D
Ribbon windows 23’- 0”
Supply air 2’ x 2’ Structural concrete columns
Entry hall
C
Exit Stair
Mechanical Closet
Bath
Kitchen
B
Open living space 23’- 0”
A
1
2
3
4
75’- 0”
23’- 0”
Return air
Stainless- Steel 30% to 90% Condensate Pan Filter Efficiency
Demand Controlled Ventilation (DCV) t e a m
i s
A l
Single- Packaged VAV HVAC Rooftop Unit
20’- 6” x 7’- 3”
10’- 10” x 7’- 3”
Zone 3
Electronic Control Unit
Dual Independent Fully Isolated Refrigeration Circuits Supply Fan
Ultra Low- Leak Damper System
Supply Air Duct Zone 2
Exhaust Air Duct
Variable Air Volume (VAV) box Zone 1:
Mercantile 5,756 sf
Zone 2:
Office 20,068 sf
Zone 3:
Residental 6,400 sf
One diffuser per 250 sf
Zone 1
10’- 10” x 7’- 3”
Energy Balance Evaluation Single- Packaged Heating and Cooling Unit
Key Values
Parapet wall Metal flashing
Interior load bearing core wall
Wear course Roofing membrane Rigid foam insulation Vapor retarder Concrete roof slab
Project Name: Project Location: Activity Type: Evaluation Date:
Lubbock, Texas Office 11/28/2010 7:06 PM
Tempered floor area: Ventilated volume: Outer heat capacity:
32397.92 442033.67 13.39*10-4
Energy Consumption
Electrical cabling rack
Suspended gypsum ceiling
Yearly total
Source
kBtu/year
Fresh air supply
Yearly specific
USD/year
kBtu/sq ft,year
USD/sq ft,year
28.9% Natural gas
377170
3352
11.65
0.10
71.1% Electricity
926193
14397
28.60
0.44
1303363
17749
40.24
Total:
Stucco finish Gypsum sheathing substrate Thermal insulation 2 x 8 Metal studs Gypsum board
sq ft cu ft Btu/sq ft,F
Calculated heat transfer coefficients: U values [Btu/sq Building shell average: 0.12 Roofs: 0.65 - 0.65 External walls: 0.05 - 0.05 Basement walls: Openings: 0.23 - 0.23
0.55 1303363 kBtu 40.24 kBtu/sq ft
Carbon Footprint CO2 emission as a result of operating this building is 108 tons CO2/year This amount of CO2 is absorbed in one year by 1.2 acres (roughly equivalent to 0.9 football fields) of tropical forest.
IT closet
108
Monthly Energy Balance
1’- 6” x 1’- 6” supply 9” x 9” return
Emitted energy per Month 387039.9
Mechanical cooling
300000
Hot water
200000
Mechanical ventilation Infiltration
100000
Maintenence platform
[kBtu]
0 0
Transmission Jan Feb Mar Apr May Jun
Jul
Aug Sep Oct Nov Dec Solar gain
100000
Human heat gain
200000
Electricity
300000
Primary heat source Primary hot water source Supplied energy per Month
Hot/cold water and sewer lines beyond
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