JUNFEI PEI WORK SAMPLE
2014-2017
resume EDUCATION
name Nationality date of birth marital status current location
Junfei Pei China 03/06/1990 Single St. Louis, USA
phone e-mail wechat website address
(+1) 314-570-4814 peijunfei@wustl.edu 67825259 www.junfeipei.me 754 Leland Ave. Apt 2N, St Louis, MO, 63130, USA
• Southwest Jiaotong University(SWJTU), Chengdu, China Bachelor of Engineering, in Landscape Architecture Design GPA: 3.31/4.0 2009-2014
-5-year landscape architecture program -Class Monitor 2009-2013 -GPA: 3.31/4.0
• Washington University in St. Louis, St. Louis, USA Master of Architecture GPA: 3.86/4.0 2014-2017
-Anticipated graduation in May 2017 -3.5-year NAAB accredited program -GPA: 3.86/4.0
WORK EXPERIENCE
• DSL Consultants Pt Ltd., Beijing, China Intern -Became familiar with whole process of actual design project through the guest house and hotel project at Wuxiang Lake in Nanning -Skilled at grasp graphic and modeling software, such as Sketchup, AutoCAD and Adobe Suite -Independently designed interior environment and outside landscape as one of comparative proposals
2013.9-2014.1
• Tianjin HHDesign (Hua Hui Environmental Design) Co. Ltd., Tianjin, China Intern -Became familiar with general operations in a major design institute containing complete divisions and departments -Coordinated with different design departments to discuss about design works -Acquired rendering software such as V-ray and Atlantis to present expected effect -Learnt BIM (Building Information Model), and remodel one of my course design in Revit
HONORS & AWARDS
2013.2-2013.3
• SWJTU First-class/Second-class/Third-class Scholarship for Academic Excellence 2010-2014 • National Scholarship (Top 1%), Ministry of Education of the PRC 2010 • SWJTU Scholarship for Academic & Extracurricular Excellence 2010 • SWJTU Merit Student Award 2011 • 3rd Award, the ‘Nature/City/Architecture: ‘Xingcheng Cup’ International College Students Design Contest’ Chengdu Biennial· Holistic Realm: International Architecture Exhibition 2011 • Outstanding Leader of Youth League 2012 • Graduate student scholarship, Washington University in St. Louis 2014-2017
PUBLICATION
• Pedestrian Street Chief Editor Student Independent Magazine, SWJTU Architecture School, 2010-2013 • Approach Projects selected, Student Work Annual Collection. 2014-2015, 2015-2016 • Berlin Atlas Participant, Photography Collection of Berlin, 2016
EXHIBITION
• 7 ROOMS
SKILLS
• Language: Native in Mandarin Chinese, Fluent in English • Software: Basic: Mcrosoft Office Suite, Autodesk Autocad, Autodesk Infraworks, ArcGIS 3D-Modeling: Sketchup, Rhinoceros, Revit, T-spline Rending: Lumion, V-ray (for Sketchup, for Rhino), Keyshot, Atlantis, Twilight, TheaStudio, Maxwell Parametric: Grasshopper, Dynamo Graphic Design: Adobe Photoshop, Illustrator, InDesign, AfterEffect
Participant, Pritzker Art Foundation, St. Louis, 2016
content
01 | ASCEND! BERLIN! Make it Public New welcome center for refugees 02 | A SYNTHESIZED CITY Beyond ‘SoHO’ Another ‘fresh level’ of Big Apple 03 | SOCIAL ATTRACTOR Floating Rhythm A ‘Jazz’ library 04 | EXHIBIT ITTNER William B. Ittner’s legacy in midtown St. Louis Exhibition+Education+Housing 05 | FORMAL MANIPULATION Folding A riverside villa *** 06 | TRANS-MUTATIVE SQUARE Explore with Grasshopper 07 | CONSTRUCTING IDEA “7 Rooms” Exhibition 08 | INTERNATIONAL HOUSING STUDIO Buenos Aires 09 | BUILDING SYSTEM: CASE STUDY
public transportation
01 | ASCEND! BERLIN! Make it Public-New welcome center for refugees Instructor: Johanna Meyer-GrohbrĂźgge Period: 2016 Spring Location: Berlin, Germany Architecture Comprehensive Studio in Berlin The new House Of Welcome-Berlin is among other public amenities providing rooms that can be rented by the Lageso, the BAMF, the Arbeitsamt (employment center) or other governmental services upon need. It also is a place of information about all the possibilities that the new arrivals have, where and how they can apply for jobs, housing and other kind of supports. It should be their first starting point. It should not only provide new capacities but be a welcome sign. It should give the people orientation and a first place to turn to. It is not only for refugees and those seeking asylum but be for all people that come to Berlin and want to stay, also those applying for citizenship, students and temporary visitors.
N
4f truss
occupy
3f truss
shrink
cave
ascend
2f truss
vertical circulation horizontal circulation entrance
vertical structural elements
3
9
2
1
8
7
6
4
5
1
2
1
3
1 info. desk/ register center/ info. center 2 lobby/ flexible space 3 exterior plaza 4 self-service center 5 first register 6 kitchen 7 restaurant 8 emergency office 9 U-Bahn exit/ public transportation
N
Ground Floor Plan
2nd Floor Plan
3rd Floor Plan
4th Floor Plan
air exhausted
1 A102
air exhausted
1 A102
1
1
2
2 14.700m14.700m
3
Exhausted vent/Roof edge joint
Trickle vent
1 A101
4 passive chill beam passive chill beam
1-A102 DETAIL SECTION 1”=1/2’
stripe light
3
1 A101
10.800m10.800m
4
stripe light
1-A101 DETAIL SECTION 1”=1/4’
5
5 fin tube convextor fin tube convextor
1 ROOF ASSEMBLY roof membrane 15mm cover board 185mm roof insulation subtrate board metal deck perforated aluminum ceiling
7.200m 7.200m trickle vent
6
trickle vent
6
2 GUTTER roof membrane 15mm fire retardant plywood board all sides gutter 60mm min insulation 3 triple layer glass 4 FACADE ASSEMBLY scatter aluminum finish panel 18mm air cavity alum sub-framing with 25mm rigid insulation in between 40mm batt insulation vapor-retarding air barrier 10mm gypsum exterior sheathing 70mm cold-formed matel framing
3.600m 3.600m
5 FLOOR ASSEMBLY polished concrete floor 9mm screed 40mm accoustic insulation 120mm composite slab perforated aluminum ceiling 6 SOFFIT ASSMBLY steel structural beam cold-formed metal framing 10mm gypsum exterior sheathing vapor-retarding air barrier 120mm rigid insulation alum sub-structure white painted matte alum finish panel 7 exterior drainage
7
7 0.000m 0.000m
Detail Section
mechanical
mechanical
Section
02 | A SYNTHESIZED CITY Beyond ‘SoHO’ Another ‘fresh level’ of Big Apple Instructor: Janiffer Yoos Period: 2016 Fall Location: SoHO, Manhattan, NYC Architecture Optional Studio
Manhattan section through SoHO historic district
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CANAL ST
NYU
SOHO
E. HOUDSON ST B D F M
The synthesized multilevel city suggests not an aggregation of disparate parts, but a unified whole where integration achieves a continuous urban fabric; unifying buildings, landscape, and infrastructure. Ideally, a more interconnected city shifts buildings away from their typically autonomous object-like character by synthesizing architecture with infrastructure and landscape to create more cohesive urban space. The studio will focus on emerging multilevel urban network conditions that are rapidly changing how cities are conceived and organized. With the opening of the High Line in New York, and the completion of other notable works such as Steven Holl’s Linked Hybrid project in Beijing, and recent proposals by Work AC, MVRDV, Zaha Hadid and OMA, there is a renewed interest in urban spaces that employ three-dimensional networks of pedestrian systems. At a larger urHIGH-LINE MadisonSquare HUDSON YARD K TOWN 3 PHASE Garden ban-scale, elevated pedestrian networks continue to be built in more ad hoc forms in major cities throughout North America and Asia as a means to rejuvenate weakening urban centers. In many of these cities, uninspired architectural forms are employed to pragmatically address urban problems related to street congestion and climatic conditions while inadvertently creating new forms of segregation in the city. Yet, in its more optimistic forms, the synthesized multilevel city is more interconnected, more differentiated, exciting, and potentially more resilient. Throughout the studio, while addressing the practical impetus for these systems, I explored ways that the multilevel city can create more positive and proactive urban forms, in a typical vertical city, Manhattan, NYC. A C E 3 BDFM N R PENN STATION
PATH
33 RD STR
Master Plan 1:3000
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Latitude Latitude of NYC=40° of NYC=40° Latitude Latitude of NYC=40° of NYC=40° a=90-40+23.5=73.5° a=90-40+23.5=73.5° a=90-40+23.5=73.5° a=90-40+23.5=73.5°
a
a
a a
NN
NN
REPLACEMENT
AIR-RIGHT RE-OCCUPY
-takeout some existing building and keep their facade partially. -make inner courtyard open to street. -give more chance to create new structure element in replacement. -insert new program attracting people to upper level.
-buy air right of lower building on site together, and develop complex to infill the space above roofs. -enlarge courtyard footprint to make sure have more natural light. -new layer of roof top will be continuous and occupied.
EXISTING VERTICAL STRUCTURE -reinforce and extend some existing core vertically to new developed upper intervention.
MODIFICATION+ADDITION -new structure elements raising from replacement play the core role in structural system. -steel structure system is lighter comparing to the existing buildings.
office
Roof garden Sports court
private
shared small business incubator
sports court
roof garden
common room
grocery
residential
gym
meeting Agora
Informal theater
Commercial
Education/After school class
Residential
Common room/kitchen
Fitness/Gym
Restaurant
theater
gallery Office/workshop
communication
Office/workshop
bookstore
public Commercial
cafe
restaurant
classroom
art/ design studio
workshop event space
ART district
Exhibition/Art gallery
Latitude The original artists inof NYC=40° Soho area are moving out because of the high land value/rent cost, instead of opening more and more a=90-40+23.5=73.5° famous brand store/ commercial street front store. This situation caused and very unbalanced life circle between night and day time, terrible utilization condition of upper level as well. Most of the historic buildings are transformed into office or commercials. Although art activities such as galleries operation are still here, but the space is not enough and affordable for artist to work anymore. In addition to the inversed circulation strategy mentioned above, more things can be happened not only a above roof top of Soho, bu also beyond it. By introducing new complex with all kinds of programs, including residential, recreation, exhibition, commercial and even roof landscape. Reoccupying air rights space to develop complex as a whole strategy is away to lower the existingNbuilding’s value and to improve upper level quality of existing buildings, based on the demands of different blocks in Soho area. Finally, the whole district can become layered with not only natural landscape/playground on the new roof, but also have chance to create a new life circle, a new life method and a new lifted community-WHICH I BELIEVED AS A “BEYOND”.
COMMERCIAL
RESIDENTIAL
RECREATION
BRIDGE SITUATION connection with other rooftop complex
GROUND SITUATION connection with street front.
ROOF PLAN
GROUND FLOOR PLAN
West Elevation
7th FLOOR PLAN
9th FLOOR PLAN
West Section
Physical Model
the Arch
mississippi eiver
03 | SOCIAL ATTRACTOR Floating Rhythm A ‘Jazz’ library Instructor: Tyler Meyr Period: 2015 Spring Location: St. Louis, USA Architecture Core Studio
This core studio asks students to practice spatial manipulation with multiple programs fitting in. Also it lets me think carefully about context to find out the potential start point of design. From the study of site context: in the between of industrial and residential area, building should be intended to be a community center. (Especially how to invite people from main road to the building with the feeling of floating (piloti) to activate and utilize negative space (under the highway). According to the blues and landmark site analysis, give particular orientation for building and make it more open to residential direction with relative smaller architectural mass. At the same time, we are asked to design a library for Jazz music, which has historic origin in Soulard district, St Louis. Such a library need traditional reading and stack space as well as new kind of space containing multi-media research and study. A small performance space for 200 people also required in proposal. Therefore, the project is not so much a library as a mini complex.
soulard district
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SITE STL downtown
0 8 16
soulard district
32
64ft
N
Site Plan
soulard district
SITE SITE STL downtown
STL downtown
N N
200 seats theater
view angle
exterior deck
soulard district
soulard district
exhibi
SITE SITE STL downtown
STL downtown
recording studio
N
Expand to space under highway
N
200 seats theater
basic composition
soulard district
exhibition insert functions listening space
200 seats theater exhibition
soulard district
SITE
recording studio listening space
SITE
STL downtown STL downtown
N recording studio N 200 seats theater
soulard district
SITE
recording studio 200 seats theater listening space
Cut topographic surface
manipulate slope exhibition listening space
staircase
exhibition
soulard district
recording studio
Elevate corner
N
200 seats theater exhibition
N
200 seats theater
listening space recording studio
listening space
curve
structural subdivision
open to sky
envelop triangularization
exhibition
Make public sinking entrances
recording studio 200 seats theater
listening space
Reorganize flow
exhibitionrecording studio
site diagram 200 seats theater exhibition
listening space
Site Strategy Sink into ground
Diagram From concept to architecture
1 2 3 4
main entrance plaza terrace deck 200 seats theater listening space
2
1
F
3
E
2
D C
N
4
A
B 0 4 8
16
32ft
3F Plan
11
10
1
8 1 9
-1F 2
exhibition
1 7
multimedia sapce theater
1F
2 3
6
2F
Plans
coomunication space
storage
vertical connection
interactive learning center
info. & service
open stacks
WEST
EAST
xxiii
Continental Building
iii
xx1v
iii vi
Sccotish Rite
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xvi
N Site Plan
William B. Ittner’s legacy in midtown St. Louis Exhibition+Education+Housing Instructor: Jan Ulmer Period: 2016 Summer Location: St. Louis, USA Architecture Comprehensive Studio
typical school dimensions
32ft
8ft corridor
04 | EXHIBIT ITTNER
classroom 24ft 16ft
Grid determined by typical dimension of Ittner’s school
View exclusive view of Sccotish Rite & Continental Building
The studio is proposing a william b. ittner museum in saint louis. william b. ittner (1864-1936) is an important architect who was based in saint louis and designed many school buildings in the city and nationwide. the comprehensive studio gives me the opportunity to think through my ideas and concepts from the cityscale to the details of presenting a great architects legacy. the challenging question of how to exhibit architecture-as we know a big difference to exhibiting art-will make us think about the different scales and forms of representation of architecture, from thewriting, the drawing and models to the realized object. we consider architecture as an interface between public and private, inside and outside, between the neighborhood and the whole city. the goal is to create a sustainable reconnection of ittners work with the community. My project’s site is located in a very special location. In the midtown of St. Louis, Grand center area is a sub core of St Louis city circle. A lot of cultural facilities are located around here. the corner site is face toward east, where the great arch located. What’s more important, is that the site is in between of 2 Ittner’s public building: Continental Life Building and Scottish Rite Cathedral. These 2 buildings are very different from his most common works typology: school building. Therefore, let people have a close view of this two building is a good way to orgnize exhibition. Inward aspect, implement corridor, classroom and stair class of Ittner’s will become another way to arrange exhibition.
Case Study Spatial Quiality in Ittner’s School
Marshall School 1”=32’
Hempstead School 1”=32’
corridor/pathe
Sculpture Spatial study
xcavate
corridor/path
excavate
inside/outside
opening/window
inside/outside
opening
sharded corridor
sight penetration
sharded corridor
sight penetration
After William. B I ttener’s visit to Europe, he brought new vision of programmatic and spatial arrangement in school building, such as wider and brighter corridor contain communicating use for students and teachers. Next step, 2 selected school will be zoomed into. After making models and drawing figure-ground spatial diagram, I can choose interesting perspective as toolkit to exploring methods of space design.
2D collage and 3D sculpture representing my understand of ittner’s space. Try more complexities with operation of intersection, combination create many possibility for myself to find way to define my further spaces.
Continental Building 1 foyer/info. desk 2 entrance hall/flexible exhibition & event hall 3 store/Café bar 4 Café 5 wardrobe 6 residential foyer 7 storage 8 offices 9 parking grage entrance 10 courtyarad 11 administrative entrance 12 workshop 13 exhibition space 14 model & drawing display 15 library/reading space 16 after-school classroom 17 scholar residences 18 park 19 platform/roof deck 20 archive 21 event space foyer 22 event spaces 23 residencial tower
7 6 UP
10 4
3 5
UP
2
1
UP
UP
7 10
9 11
8
13 UP
Ground Floor Plan
Sccotish Rite
18
13
13
UP
16
UP
UP
16
UP
UP
16
14
15
13 UP
UP
13
17
13
UP
UP
17
13 7
UP
13
7
2F
UP
3F
UP
UP
19
21
21
UP
UP
19
22
22
22
5F
Reference grid from Ittner’s schools
Event space/multi-used hall
Research center/residential core+out door platform
Exhibition/Documentation/ Roof deck
Exhibition/Conference
Library/Afterschool classroom/Residential for research member
Cafe+gift store/Info. center/ residential entrance/courtyards
Diagram
19
13
15
UP
UP
13 19
UP
13
UP
12
16
UP
14
12
UP
22
6F
UP
Section
05 | FORMAL MANIPULATION Folding A riverside villa Instructor: Wenqu Qiu Period: 2012 Fall Location: Chengdu, China Architecture Core Studio This project is based on the practice of deliberate geometry, its iterations and transformation from form to architecture with designated programs. We are asked to find a method to create a kind of module which can be repeated in particular way by rotating, merging, folding and etc. The form must contain certain spatial character, such as barrier, compressed plain, threshold and so on. The spatial potential will be applied into a further villa design.
Operation “Handcraft�
First Floor entrance
Paper shape garage
Folding direction kitchen
guest room
sitting room
laundry
Paper shape Folding direction
dining room
child room
bathroom bathroom
living room
main bedroom
studio & workroom
Groung Floor
River SideView
Program Turn FORM into Architecture
N 0
1
5
10m
Explosive Diagram Envelop+Circulation+Structure
Floor Plans
N 1
2 3
9
3.60m
4 10
5
8
3.90m
Metal Sheet Envelop
7 11
11
6 1 entrance 2 hallway 3 sitting room 4 garage 5 guest room 6 child room 7 dining room 8 kitchen 9 storage 10 laundry room 11 bathroom
11 15
Circulation
13 12 15
16
14 0.00m
12 dressing room 13 main bedroom 14 living room 15 studio / working zone 16 book collection corridor 17 waterfront balcony
17
Light Steel Structure 0
1
5
10m
As I known, there is a dramatic topography, which allow me to apply my from within a such altitude difference. At the same time, adjust surface to make sure the spaces inside have enough area holding programs. The form constituted by oblique panels also can weaken the difference between roof, floor and walls, as one single continuous architectural element.
South Elevation
North Elevation
Section
Sitting Room
Dinning
Living Room
Natural Pattern: Oder to Chaos
Variation 1
Variation 3
Variation 2
Variation 4
This course is about new digital ways creating complexity in new architectural vista. From the initial natural pattern study and research, each team will find a grasshopper definition to finalize geometry which is controlled by varies plug-ins.
06 | TRANS-MUTATIVE SQUARE Explore with Grasshopper Instructor: Jason Butz Period: 2015 Fall Course: Advanced Grasshopper Technology+Tectonic
3D Printed Sample: 7’ x 7�
Grid Point-cloud Deformation Segment 01
Grid Point-cloud Deformation Segment 02
dividing parameter: 00 : 11: 36
dividing parameter: 00 : 32: 43 Point Cloud Movement Trace Time Step: 5 sec
Point Cloud Movement Trace Time Step: 1 sec
Phase 01
Phase 02
Phase 03
Phase 04
axo
plan
elevation
grid outcome
Structure Analysis optimizing and selecting Segment 01
MATERIAL: steel SECTION SHAPE: I-beam
MATERIAL: steel SECTION SHAPE: solid-circle
MATERIAL: steel SECTION SHAPE: solid-circle
Most Stable Final Outcome
Fabrication 3D Printed Casting Shuttering
plan
elevation
grid outcome
Speculation Spatial Intervention Applying my prototype into city as an architectural intervention to make special spatial quality.
MATERIAL: steel SECTION SHAPE: solid-square
Segment 02
MATERIAL: steel SECTION SHAPE: I-beam
axo
MATERIAL: steel SECTION SHAPE: solid-square
Fabrication & Construction Components+Build up on site
07 | CONSTRUCTING IDEA “7 Rooms” Exhibition Oli ve St .
Instructor: Jan Ulmer Teammate: Yuchen Song Period: 2016 Fall Course: Constructing Idea Location: Pritzker Art Fundation, St. Louis, USA
historical map existing buildings intervention sites (20*20ft)
We used vertical framed wall facing slope frame supported surface to indicate two different buildings, two different attitudes toward different directions. The slope is facing the St Louis downtown, especially presenting iconic building new around with in ‘window‘ on vertical wall. It gives people a chance to walk through the gap in between and lay at slope to see skyline.
Proposal Slope V.S. Vertical Wall
Proposal 1
Figure/Ground Relationship
Test Mockup Model
Proposal 2
Proposal 3
Tectonic Frame+Surface
08 | International Housing Studio: Buenos Aires
09 | Building System: Case Study
Third Space Social housing in Buenos Aries
PROJECT: O’Reilly Clinical Health Sciences Center Missouri State University DESIGN: Canon Design
Instructor: Catalina Freixas Period: 2015 Fall Location: Palermo, Buenos Aries, Argentina Architecture Core Studio
composite
structure
envelope
finish
ROOF ASSEMBLY 02 ROOF MEMBRANE 1/2” COVER BOARD ROOF INSULATION SUBSTRATE BOARD METAL DECK
4
2’*2’ GRID CEILING 1/2” FIRE RETARDANT PLYWOOD ALL SIDES GUTTER 2” MIN INSULATION AT GUTTER 1/4” BENT ALUM PLATE CONSTRUCT WOOD BLOCKING WITHIN ROOF ASSEMBLY AS STUD & INSULATION BETWEEN VERTICAL MEMBER
TO COPING 157’-2”
UNFACED MINERAL WALL DEADLOAD CURTAIN WALL ANCHOR
4’’-0”
SUPPLY AIR DIFFUSER WINDOW SHADE
1-1/2”:1’-0” SLPOP
24’-2”
8’’-0”
E
9’’-0”
CURTAIN WALL
SOLID SURFACE STOOL 1/4” BENT ALUM SILL PLATE STAINLESS STEEL FLASHING 5” ROOFING INSULATION 1/2” FIRE RETARDANT PLYWOOD METAL Z CLIP
ROOF ASSEMBLY 01
3’’-0”
ROOF MEMBRANE 1/2” COVER BOARD ROOF INSULATION COMPOSITE SLAB 1/4”ALUM COPING
LEVEL 03 133’-0”
3” RIDIG INSULATION
RIGID CLIP
WALL ASSEMBLY EXTERIOR FINISH PANEL ALUM SUB-FRAMING 5” INSULATION VAPOR-RETARDING AIR BARRIER 5/8” EXTERIOR GYPSUM SHEATHING 6” COLD-FORMED METAL FRAMING
7’’-0”
Section 1
CONSTRUCTURAL STEEL WITHIN STUD CAVITY FOR SUPPORT OF STEEL ANGLE CONT FLASHING GALVANIZED STRUCTURAL STEEL ANGLE
7’’-0”
17’-0”
NON-STRUCTURAL METAL FRAMING FINISH CEILING WINDOW SHADE CURTAIN WALL
3’’-0”
SOLID SURFACE STOOL
SMOKE SEAL PERINETER JOINT DEADLOAD ANCHOR NON-STRUCTURAL FRAMING
3’’-6-1/2”
LEVEL 02 116’-0”
1/4” EXTRUDED ALUM ANGLE
3’’-8-1/2”
Section 2
SOFFIT ASSEMBLY SOFFIT FRAMING HUNG (DEADLOAD) FROM 2ND FLOOR ABOVE
WALL ASSEMBLY
17’-0”
EXTERIOR FINISH PANEL ALUM SUB-FRAMING 5” INSULATION VAPOR-RETARDING AIR BARRIER 5/8” EXTERIOR GYPSUM SHEATHING 6” COLD-FORMED METAL FRAMING
EXTERIOR FINISH PANEL ALUM SUB-FRAMING 3-1/2” INSULATION BLACK SCRIM-FACED MINERAL WOOL BOARD VAPOR-RETARDING AIR BARRIER 5/8” EXTERIOR GYPSUM SHEATHING 6” COLD-FORMED METAL FRAMING
9’’-0”
FLASHING 1/4” EXTRUDED ALUM ANGLE DEFLECTION CLIP B/W DOOR HEAD MINERAL WOOL INSULATION
CONCRETE SLAB ON GRADE VAPOR BARRIER
2’-0”
LEVEL 01 100’-0” 0’-3”
MECH 98’-0”
FOUNDATION WALL ASSEMBLY DRAINAGE MAT RIGID INSULATION WATERPROOFING CONCRETE RETAINING WALL
4
Section 3
Detail Section