Structural Concrete

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Student Design Competition

Structural Concrete 2013

Contents Introduction 3

Project brief 4

Design data 5

• Loadings

• The Site

Submission requirements 8

• Conceptual Design Report

• Verification of Structural Viability

• Drawings

Assessment criteria 10

• Local

• National

Awards 10

• University Level

• National Level

• Presentation

• Eligibility

Rules 11

Entry form 12

Laing O’Rourke is a globally diverse engineering enterprise with a commitment to delivering Excellence Plus performance, founded on 164 years of experience. We fund, design, manufacture, construct and maintain the built environment – providing the facilities to accommodate, educate, employ, transport, care for and sustain communities. Through our fully integrated offer we are delivering single-source solutions across the client value chain for some of the world’s most prestigious public and private organisations.

Our collaborative approach combines discipline in delivery with the continuous pursuit of innovation: working with customers from concept to completion, advising on and providing the best ways to successfully complete projects and achieve greatest value for all stakeholders – employees, customers, communities and shareholders. We are implementing a long-term strategy which aims to create sustainable growth by meeting the economic, social and environmental challenges of our rapidly changing world.

Our pursuit of engineering excellence is supported by our investment in innovative industry-leading precast concrete and offsite manufacturing facilities.

More information is available online at: www.laingorourke.com

The Concrete Centre is the central development organisation for the UK cement and concrete industry. Its objective is to assist all those involved in design and construction to realise the full potential of concrete as an adaptable and sustainable construction material.

For more information on The Concrete Centre visit www.concretecentre.com

The Concrete Centre is part of the Mineral Products Association, the trade association for the aggregates, asphalt, cement, concrete, dimension stone, lime, mortar and silica sand industries.

Paper Setting Panel

Dr Howard Taylor Consultant Mr Adam Locke Laing O’Rourke Dr Andrew Jackson Laing O’Rourke Mrs Jenny Burridge The Concrete Centre

Award Judging Panel Dr Howard Taylor Consultant Mr Roger Hewitt URS Scott Wilson Mr Sam Wong WSP Mrs Sarah Fray The Institution of Structural Engineers Dr Andrew Jackson Laing O’Rourke Dr Andrew Minson The Concrete Centre Mrs Jenny Burridge The Concrete Centre

Structural Concrete 2013

Introduction Structural Concrete 2013 sets a demanding challenge for all students studying structural design as part of UK University BEng, MEng and MSc degree courses in Civil and / or Structural Engineering.

The competition aims to encourage interest and raise competence in designing with concrete. It offers a stimulating challenge to students, while supporting the curricula of Civil and Structural Engineering Departments of UK Universities. The main benefit for a student is in being able to present his/her work to prospective employers, some of whom are involved in setting and judging the competition. The national winners will be presented with their prizes at a ceremony in London where their award winning entries will be shown.

There will also be a sustainability award for the student who demonstrates the best understanding of this subject in his/her submission.

These awards reflect a significant commitment from the judges and academics who, together with The Concrete Centre, have carefully developed this year’s competition. Initiative, creativity, aesthetic appreciation and accuracy are called for, and will be assessed by the judges. Above all, this competition has been designed to stretch the technical competence of the students taking part.

Because it is so flexible, Structural Concrete 2013 can easily be incorporated into existing university curricula, with a content that reflects an independent project, a group project or a module assessment run over the first, second or both semesters of the academic year.

The client, a property developer, has commissioned an initial structural design for the development, to be known as Portland House, from a firm of consulting engineers. The building includes an underground basement with private car parking, a leisure development on the ground floor, and a further nine floors of luxury residential accommodation. Entrants must respond as though they are the structural engineer responsible within the consultant’s team.

This year’s challenge… The 2013 project is to design a luxury residential building forming part of an extensive redevelopment of a former industrial site close to the centre of a large UK town.

Structural Concrete 2013

1. Project Brief: Portland House Portland House forms part of an extensive redevelopment of a former industrial site close to the centre of a large UK town. The new building comprises an underground basement, a private leisure development on the ground floor, and a further nine floors of luxury residential accommodation. The client, a property developer, has commissioned an initial structural design from a firm of consulting engineers.

The new building is to be developed on the corner site shown in Figure 1 (for all figures see pages 6 and 7). The client wishes to maximise the number of apartments on the plot so there is little space on the site outside the building plan. The construction method chosen for the scheme should therefore minimise the requirement for layout space on site. The building plan and site boundaries are shown in the drawings.

Underground car parking will be provided for some of the residents, with surface parking for other residents. Staff and clients of the leisure complex use a surface car park to the south shared with an adjacent and already completed part of the development.

Vehicle access to the basement car park will be via a ramp at the east end of the building. The vehicle ramp does not have to be designed at the present time. The layout of parking spaces and access to use the available space to best advantage has already been determined: see Figure 2. Columns may be located only between bays. A floor to soffit height of 2.4m is required throughout the basement. Stairs lead from the basement to the ground floor.

The ground floor will provide space for luxury leisure facilities. The intended ground floor layout is shown in Figure 3. The floor to soffit height of the ground floor is 3.75m, which includes an appropriate allowance for services. While the client does not wish to be prescriptive about the structural arrangement, positioning of vertical structural elements within units should be avoided as far as is reasonable. Access from the ground floor to the residential floors is via lift or stairs in the tower located on the north elevation of the building.

Above the leisure facilities, nine floors of luxury residential accommodation are to be constructed. A typical residential floor layout is shown in Figure 4. The floor to soffit height is 2.75m, including an appropriate allowance for services. Access will be via stairs or lift in the tower. To enable internal fitting out of apartments to suit individual customer requirements, the client requires that internal columns/walls be located only along the line of party walls, while internal columns within the apartments are not permitted. The location of two service routes is shown, and requires a void in the floor slab of 0.75m x 2.4m within each zone.

At roof level, all servicing plant including water tanks, heating boilers and lift mechanism are to be located on top of the stair/lift tower and screened by a 3.0m high enclosure on external faces. The enclosure screen itself does not have to be designed.

Planning considerations dictate the use of faced precast concrete cladding panels on the façade. Because the high quality cladding forms a significant component of the cost of the building, the depth of floor construction plus services should be as small as practicable to minimise the overall height of the building.

The client would prefer a construction solution which would minimise the time taken on site and would welcome proposals from the structural engineer that might enhance the visual appeal of the building, which is being targeted at the luxury end of the housing market

Structural Concrete 2013

2. Design Data Verification of structural viability should be carried out in accordance with current Eurocodes. Entrants should clearly state in their submission which documents have been used in their calculations. Material specifications should be defined to current standards.

2.1 Loadings Dead loads of structural elements: as found. Cladding: an average value of 2.4kN/m2 of elevation may be taken.

Imposed loadings:

Plant room (including roof ) 10kN/m2

Other areas of roof not zoned for plant 0.75kN/m2

Residential floors, including corridors and stairs (including allowance for internal partitions but not party walls)

3.0kN/m2

Party walls 4.3kN/m2 on elevation

Ground floor 4.0kN/m2

Basement 2.5kN/m2

These loadings include an allowance for raised floors, ceilings and services.

To the north of the building, the basement roof is required to carry vehicular traffic. This area should be designed for an imposed loading of 10kN/m2

All values are characteristic values.

2.2 The Site Exposure conditions

The site is level, situated near the centre of a large town. The principal axis of the building superstructure is oriented in an east-west direction.

The fundamental basic wind speed should be taken as 22m/sec (based on the 10 minute mean wind speed as given in BS EN 1991-1-4:2005). Snow loading may be neglected.

Ground Conditions:

Description Depths below ground level

Soil data

Made Ground GL to 3.4m

River terrace deposits (sand and gravels)

From 3.4m to 9.8m N=20 Density 1940kg/m3

Stiff Clay From 9.8m to 35.7m Cu=150KPa

Bedrock Below 35.7m

Ground water was encountered in sample boreholes at approximately 2.4m. There may be seasonal variations in groundwater level, but monitoring of one standpipe over the period Oct-April shows a maximum groundwater level of 2.0m.

Structural Concrete 2013

10m

Existing car park

Main road

Outline to basements

Site boundary

Access road to development site

4 bays min width 2.5m

Outline of ground �oor

13400

26400

Lift

Plant room

9 bays min width 2.5m

Up to ground �oor

Cycle/Mbike storage area

5950152504500 25700

Figure 1: Site Plan

Figure 2: General Arrangement Basement Level

Structural Concrete 2013

25700

9800

Changing 1 4.5 x 2.6

Changing 2

3.2 x 3.6

Down to basement

4500

Gym 9.8 x 7.2

13400

2860

O�ce 3.8 x 5.4

En tr

an ce

Salon 5.95 x 7.2

Creche 3.0 x 6.2

6200

Car park

access

Down

Store 4.5 x 3.3

Cafe bar 5.45 x 8.0

CV suite 4.5 x 10.1

Services 5.3 x 1.5

25700

6900

98004500

Flat 2

Services

Lift

Services

5950

Flat 1

6900

Flat 3

5950

Flat 4

2860

13400

1200

Figure 3: General Arrangement - Ground Floor Plan

Figure 4: General Arrangement - Typical Residential Floor Plan

Structural Concrete 2013

3. Submission requirements The submission is to comprise four components:

i. A conceptual design report.

ii. Appendix 1 containing design calculations for the selected scheme superstructure.

iii. Appendix 2 containing the drawings of the selected scheme superstructure.

iv. Appendix 3 containing a sustainability appraisal.

The submission must not exceed 60 single sided A4 pages and three A3 size drawings. Only one copy is needed.

3.1 Conceptual Design Report A maximum of 30 pages, of either 1.5 line spaced text in a maximum 11pt font, or neatly hand written in black ink, which should include:

i. An appraisal of two distinct and viable structural solutions for the above ground floor construction, together with their associated column/wall layouts.

The appraisals should include sketches with supporting notes outlining the intended load transfer mechanisms, framing and stability functions, and the construction methodology.

ii. An evaluation of the merits and disadvantages of the two solutions.

The evaluation should identify significant differences such as cost or buildability between the two alternatives, and make a recommendation in favour of one solution.

iii. A description of the structural solution adopted for the ground floor slab and a rationale for the selection.

iv. A description of the foundation scheme adopted for the preferred solution, with a rationale for the selection. A fully detailed design for the foundation scheme is not required.

v. An outline specification for the structural concrete and reinforcing materials to be used. vi. A method statement for a safe construction procedure for the building.

vii. A statement on the robustness of the building to avoid disproportionate collapse.

3.2 Verification of structural viability The verification of structural viability of the structural scheme should be demonstrated in the Appendices to the conceptual design report to make up the balance of the report.

Appendix 1 should contain sufficient design calculations by hand to establish the form and size of all structural elements for the chosen scheme. Entrants should decide how best to convey this information within the space constraints imposed.

Calculations for individual elements should enable a checker to understand clearly their contribution to the strength and stability of the whole structure, and the load paths assumed. Hence, if computer output is presented, validation by (approximate) hand calculations is also required. Consideration should be given to performance at both serviceability and ultimate limit states.

3.3 Drawings A total of three A3 drawings should be included. Drawings may be prepared using appropriate CAD software, or by hand. In either case, notes and dimensions should not be smaller than the equivalent of an 11pt font.

Drawings should be to an appropriate scale (1:200 should be appropriate for main views). Two of the A3 drawings should be used to present general arrangements, sections and elevations of main frame, tower and basement to show the layout, disposition and dimensions of structural elements for estimation purposes. Reinforcement details should not be shown on these drawings.

The third drawing should show clearly annotated sketches of the following construction details: (Detailed dimensions are not required, but drawings should be approximately to scale.)

i. The method of support for the precast cladding panels.

ii. A section through the basement wall, including the junction with basement and ground floors, and including both waterproofing/tanking arrangements and outline reinforcement details.

iii. A connection between the ground floor and a 1st floor column, including outline reinforcement details.

iv. A connection between the 1st floor slab and an internal column, including outline reinforcement details.

3.4 Sustainability appraisal The client wishes to promote the sustainability aspects of the apartments to future purchasers. Prepare a short report (maximum 3 single sided pages) discussing how your design promotes various sustainability criteria.

Structural Concrete 2013

4. Assessment criteria 4.1 Local The competition will operate on two levels. Firstly all submissions made at each university will be judged by the academic tutor(s) involved with the project. The winning submission from each University should then be entered for the national level of the competition by the tutor.

Only one entry from each University can go forward for final judging at a national level.

4.2 National The winning entry from each participating university will be judged at national level using the following generic assessment criteria:

� Compliance with the project brief

� Safety, function, stability and robustness

� Buildability, constructability and maintainability

� Speed of construction and cost effectiveness

� Imagination, flair, aesthetic appreciation and innovation

The interpretation of the above criteria by the Award judging panel will be final and feedback will not be provided.

5. Awards 5.1 University Level The winning entry from each University will receive a prize of £250. The winning entry will go forward to compete at national level.

5.2 National Level The winner(s) of the national competition will receive a certificate(s) and a prize of £1,250.

Runner(s) up will also receive a certificate(s) and a prize of £750. (The judges may decide on a joint first prize in which case the above prize money will be divided up by the Judging Panel at their discretion.)

A special commendation, certificate and prize of £250 will be available for the best Sustainability Appraisal.

The prizewinners’ Universities will also receive certificates.

5.3 Presentation The prizes and certificates will be presented to the winner(s), runner(s) up and winner(s) of the special commendation at an awards ceremony in September 2013 in London. This will be part of a seminar for practicing engineers who will be able to review the winning entries. The prizewinners will be notified of further details.

5.4 Eligibility Structural Concrete 2013 is open only to students studying for a degree at a UK University. Entries can be single, joint, or from teams of up to 4 students.

Although the competition is aimed at students in their final years of study, entries from any other appropriate undergraduate and/or postgraduate stages will also be considered at the discretion of the academic tutor(s).

Structural Concrete 2013

6. Rules I. To enter the competition the University academic tutor(s) should register the university’s intention to participate by emailing The Concrete Centre at [email protected]. Registration will enable The Concrete Centre to provide supplementary information and/or assistance if needed.

II. The completed entry form naming the local winner should reach The Concrete Centre at the address given below by Friday 7 June 2013. On receipt, The Concrete Centre will issue each competitor with an entry reference number.

III. Complete design entries must be received by the final deadline of 4pm on Friday 5 July 2013. The entry reference number should be clearly marked on all items forming the design entry, and on the outside of the package. No other form of identification or distinguishing mark should appear on any part of the submission.

IV. A successful competitor must be able to satisfy the judges that he or she is the bona fide author of the design that he or she has submitted.

V. Competitors should retain the originals of the designs and drawings submitted. The organisers cannot be held responsible for loss or damage to submissions which may occur either in transit or during exhibition, storage or packing. The organisers regret that submissions cannot be returned to candidates after the competition.

VI. Any entry shall be excluded from the competition if:

� The competitor does not meet the eligibility requirements detailed in Section 5.4

� The entry is received after the competition closing date in rule number III above .

� The competitor discloses his or her identity, or that of the University, in the submission.

� The competitor attempts to influence either directly or indirectly the decision of the award judging panel

Only one copy of each competitor(s)’ design is to be sent in a single package to:

Structural Concrete 2013

The Concrete Centre Riverside House, 4 Meadows Business Park Station Approach, Blackwater Camberley, Surrey GU17 9AB

Structural Concrete 2013

Entry Form - Structural Concrete Student Design Competition 2013 To be submitted by no later than 7 June 2013. This form is to be completed only for the entry which has been marked and selected by the academic tutor(s) for submission to the national competition. Only one entry will be permitted from each university.

University

Name & email address of Academic Tutor(s)

The following student or student team will represent the university:

Student Name

Home Address

Phone Year

Student Name

Home Address

Phone Year

Student Name

Home Address

Phone Year

Student Name

Home Address

Phone Year

1. *I/We have complied with and accepted the rules which apply to this competition 2. *I/We agree to accept the decision of the judges as final, and agree to permit free publication and exhibition of *my/our work 3. *I/we declare that the design is *my/our work and that the drawings have been prepared by *myself/ourselves. 4. *I/we agree that any part of this work may be reproduced in publicity or other materials by The Concrete Centre as required.

*Delete as applicable

Signature student(s):

Signature academic tutor(s)

This form is to be completed by the competitor(s) and academic tutor(s), placed in a sealed envelope and returned to the address given below. An entry reference number will then be given, which should be marked clearly on all items forming the design entry and on the outside of the package. No other form of identification or distinguishing mark should appear on any part of the submission.

Please return to:

Structural Concrete 2013, The Concrete Centre Riverside House, 4 Meadows Business Park Station Approach, Blackwater, Camberley, Surrey GU17 9AB

The Concrete Centre, Riverside House,

4 Meadows Business Park, Station Approach, Blackwater, Camberley, Surrey GU17 9AB

First published 2012

The Concrete Centre is part of the Mineral Products Association, the trade association for the aggregates,

asphalt, cement, concrete, lime, mortar and silica sand industries.