the tech triumvirate
site location + 1219 broadway - southeast corner
zoning code + the site currently meets the requirements for code CB-2 + central business district - broadway/thirteenth st/main st
N
Parking requirements + one space per three-hundred sq. ft. of floor area + no off street parking areas shall be permitted in front of buildings located on broadway + parking areas may be installed on the side or rear of the structure on corner properties curb cuts are only permitted on the north-south streets
height restrictions + no restriction on height + lot width - lot area - lot coverage - floor area ratio - no restrictions E
zoning + code
1219
lubbock, broadway
tx
the tech triumvirate
landscape + no less than 90 percent of the required front yard excluding paved curb or driveways up to a minimum of 10 percent of the total development lot area shall be landscaped and permanently maintained + interior courtyards are not required + all landscape shall be visible to public right of way
egress + occupancy load + 31,000 sqft (total gross) / 100 sqft (load factor for business use) = 310 occupants + 50 - 500 occupants requires at least 2 exits + max. travel distance: 200’ unsprinkled 300’ sprinkled + min. door width : 32” net clear + min. stair width : 44” occupants > 49
S
site
110’
avenue k
avenue l
broadway
128’
W
curb
+ +
+ +
zoning + code
circulation
Building site
1219
lubbock, broadway
tx
the tech triumvirate
128’
10’
110’
buildable area
6’
N
setbacks + 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. In no event, however, shall any garage have less than a twenty (20) foot front setback. + Building height and setback from adjacent right-of-way lines. + Buildings with zero (0) front and side setback shall not be required to have any on-site landscaping except that when a structure with zero (0) setback has adjacent parking ten (10) percent of that parking area must be landscaped. + Outside dining patios with front setbacks of less than twenty-five (25) feet, unless allowed by the yard requirement section of this ordinance at 29-19.1(e)(1). + Front yard. Any lot line adjacent to a dedicated street (not an alley) shall be a front. The front yard setback for structures and outdoor dining areas/patios shall be no less than the average setback established by the development on the adjacent lot or lots.
zoning + code
1219
lubbock, broadway
tx
the tech triumvirate
N
climate analysis
Jan Dec
Feb
Mar
Nov
NW
NE Apr
Oct 15.8 12.7
May
Sep 9.5
Body Temperature Ground Temperature Room Temperature
6.4
Avg. Temperature Range
Aug
Avg. Temperature
Jun Jul
W
E
temperature N 10 20 30
+
+
+
+
40
+
21:01
6:38
50 60 70 80
9
90
W
18 12
15
SE 17:44
20 +
15 - 20
10 - 15
7 - 10
5 - 7
SW
E
9
15
7:48
12
summer solstice
wind speed (mph)
zoning + code
S
winter solstice
S
sun path
1219
lubbock, broadway
tx
the tech triumvirate
+
proposal one
+
proposal two
+
+
loading dock
+
mailroom
+
lobby
+
work space
+
mass explorations
+
restaurant / retail office space
proposal three
1219
lubbock, broadway
tx
the tech triumvirate
phase one: phase two:
metal paneling on all walls, except walkways which constitute of glazing orientation of building changed; rotated 90 degrees clockwise. Brick façades were located on the south and east sides of the building. Thin horizontal ribbon windows were used on the façades facing the courtyard and glazed curtain wall was only used on the walkways. phase three: curtain wall on walkways was replaced with ribbon windows. The south and east façades are composed of precast concrete. North and west façades constitute of ribbon windows. Cladding and service core development: due to the design’s qualities and restrictions of form, the service core did not change at all. It was left on its original location (the North West side corner). On the other corner cladding materials changed during each phase allowing for different analysis outcomes.
+
proposal one
Building one was chosen as the design to further develop. Although the cost was the highest of the three proposals, the design plays a major role in the decision. The elevator shaft in proposal three is located opposite the large mass of office spaces requiring the employees to walk through a choice of fully glazed bridges to arrive at their destination. The layout of the bridges creates a semi-enclosed courtyard which lies between them and the office spaces. Proposal three also encloses the most square footage allowing for a greater number of options when dealing with program.
mass explorations
1219
lubbock, broadway
tx
the tech triumvirate
phase one:
first floor is composed of glass curtain wall. Second through fifth floor have horizontal ribbon windows on south and west façades. North and east façades are composed of brick. phase two: orientation of building changed; rotated 90 degrees clockwise. South and west façades are precast concrete. North and east façades are composed of ribbon windows. First floor is kept as a curtain wall on north and east façades. phase three: glazing used on the previous phase was kept and all other materials were replaced with EIFS. Cladding and service core development: service core was not changed due to the design’s restrictions. The core had to be located somewhere on the southeast corner only. However, different cladding materials allowed for experimentation.
mass explorations
+
proposal two
1219
lubbock, broadway
tx
the tech triumvirate
phase one: phase two:
all exterior walls constitute of thin ribbon windows and precast concrete. all ribbon windows’ cladding was replaced with metal paneling and curtain
wall material
phase three: all metal paneling was replaced with brick and south west façades are composed of ribbon windows and brick.
Cladding and service core development:
three different cladding types were applied to the building in order to define which use of cladding and building orientation is best. The service core changed location once after phase two was analyzed.
+
mass explorations
proposal three
1219
lubbock, broadway
tx
the tech triumvirate
elevator core
elevator core
elevator core
basement storage lobby space
skybridge
men
men
office space
boiler room
women
women
retail space basement storage
service core
service core
MEP room
office space
basement plan 1’
elevator core
2nd/5th plan
ground plan
10’
1’
10’
1’
10’
skybridge
65
men
office space
roof
women 60
service core roof access
office space
3rd/4th/6th plan 1’
plans
10’
roof plan 1’
10’
1219
lubbock, broadway
tx
the tech triumvirate
1
2
3
plumbing pipes (cold, hot and septic water) boiler chiller boiler chimney
4
1 2 3 4
5
7
6
5 6 7 8
fans return air duct fresh air supply duct fresh air intake/exhaust
8
enlarged plan
1219
lubbock, broadway
tx
the tech triumvirate
+ construction type and structural system 10'
Our design (B-Business Occupancy) proposal consists of reinforced concrete construction. The 1st Floor of the design is 25’ tall and the other 9 stories are 10’ tall. All slabs are two-way beam and slab construction in order to support medium to heavy live loads. Two-way beam and slab construction requires 4” minimum slab depth; we propose a 6” slab depth. In addition, we propose reinforced concrete columns that support up to 2000sf, reinforced concrete beams and anchor reinforced concrete walls to all slabs.
sixth floor
10'
3
third floor
10'
75'
second floor 5
25'
4
1
6
Our structural system is constructed with protected structural frame with one hour rating ULC design (W407). Each floor is equipped with dry pipe sprinkler systems. The fire stairs are accessible from all levels and consist of one hour rated walls. Fire extinguishers are located in the fire stairs on each floor along with dry stand pipes that can be used by the fire department in the case of a fire. The ground floor has four emergency fire escapes around the perimeter not including the front entry door. On curtain walls a noncombustible material is installed where two floors meet to prevent the spread of fire between floors along curtain walls.
1 2
25'
2
+ Fire Resistance Strategy
ground floor
elevator core lobby offices curtain wall
3 4 5 12 x 8 beam 12 x 12 column 6’’ floor slab fire stairs
structural analysis
50'
fourth floor
10'
+ Estimated Size of Members Slab: 6” reinforced concrete two-way beam and slab (spans of 15’-40’) Columns: 12”x12” reinforced concrete columns that support up to 2000sf (squared) Beams: 8”x12” reinforced concrete beams (rectangular) Walls: Anchor reinforced concrete walls (No.3 bars @ 12” o.c.); all walls are 9” thick
7
8
fifth floor
10'
Configuration of structural system Rigid Frame - Bearing wall combined with column and beam structural system in order to achieve lateral load resistance in all directions.
flat roof
6 7 8
1219
lubbock, broadway
tx
the tech triumvirate + heating and cooling system We have chosen to use VAV central all-air system because our building is essentially divided into two major zones. Lobby space (first floor area) and office space (all other floors). We chose a VAV system because we were very interested in minimizing operating cost and energy consumption, maximizing individual control over temperature, minimizing system noise and minimizing system maintenance. Also, we took the disadvantages of a VAV system into consideration, which led us to the distribution of our zones and spaces. The lobby space is the area where all other activities, outside of office work, will take place. These include: employee interactions, employee break areas for dining, visitor waiting areas and front desk activities. The other floors will be divided into two minor zones, east and west, for distribution purposes. Dividing our building in such way will give us the opportunity of taking full benefit of the VAV advantages. Also, this allows us to tackle the VAV disadvantages and utilize the system to its full potential. For instance, having only two zones does not require the building to have different cooling/heating activities. Most of the spaces will be acclimatized similarly and used at the same times. This is a proper use of the VAV system due to the fact that it has a limited range of cooling/heating demand. The VAV system cannot serve a space that needs cooling and a space that needs heating at the same time without special secondary equipment. We answer this disadvantage by keeping zoning simple and free from too many different activities.
+ Fire Resistance Strategy fresh air supply return air
+ +
+ vav (variable air volume) Air is conditioned at a central source. Supply and return fans circulate the conditioned air through ducts to the occupied spaces of the building. At each zone, a thermostat controls room temperatures by regulating the volume of air that is discharged through the diffusers in the zone.
mechanical
1219
lubbock, broadway
tx
the tech triumvirate
2 7
+ envelope system
8
5
4
the system consists of reinforced concrete construction, metal panels and double glazing. The roof and all concrete walls are insulated. Also, all levels have columns and beams for extra support of building loads.
6
3 6” slab 1/2” glazed curtain wall 12” x 12” reinforced concrete columns 8” x 12” reinforced concrete beams
1 1
2 3 4 5 6 7 8
envelope
cable routing stainless steel mullions fresh air ducting return air ducting
1219
lubbock, broadway
tx
the tech triumvirate
january 1st
ecotect analysis
may 1st
november 1st
1219
lubbock, broadway
tx
the tech triumvirate
perspective render
1219
lubbock, broadway
tx