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I’m extending my house and the new slab will sit partly above the existing ground level, so I need a retaining wall (preferably timber or concrete sleepers) designed to keep the soil in place and satisfy my local building department. The wall will be 21m long, and be 1.3m high. It will need to support the additional concrete slab and a house wall. I require structural calculations, drainage detailing, and a material schedule so there are no surprises once we start pouring concrete for the slab. Retaining wall requirements • Retained height: 1.3 m of soil. • Soil depth behind wall: 1.3 m (full height retained). • Wall location: o Retaining wall to sit outside the new slab’s perimeter footing. o Slab and footing are within the retained zone and act as surcharge on the wall. • Preferred wall type: o Reinforced concrete masonry (Besser block) wall, 200 mm thick, core filled and reinforced, timber or concrete sleeper. • Function: • Retain soil and safely resist surcharge from the new slab and footing (and typical residential imposed loads). Design standards and compliance Please design and certify the retaining wall to be compliant with: • NCC Volume Two – Part 3.1.2 Earth retaining structures, satisfying Performance Requirement P2.1.1 (structural safety). • AS 4678 – Earth-retaining structures as the primary design standard for the retaining wall (earth pressures, surcharge, stability, design life). • AS 3700 – Masonry structures for reinforced concrete masonry design. • AS 3600 – Concrete structures for footing and any concrete elements. Design life and reliability should be appropriate for a retaining wall associated with a residential building (as per AS 4678 and NCC guidance). I can supply a basic site survey and photos immediately. Deliverables I’m after: • Permit-ready drawings in PDF plus the editable CAD file • A bill of materials so I can price lumber and hardware before ordering • Engineering drawings showing: o Plan and section of the retaining wall. o Footing dimensions and reinforcement. o Wall reinforcement (vertical and horizontal). o Drainage details (gravel, geofabric, agi pipe, weep holes). o Relationship to the new slab and footing (clear dimensions and levels). • Design statement or calculations confirming: o Design in accordance with NCC Volume Two Part 3.1.2 and Performance Requirement P2.1.1. o Use of AS 4678 for retaining wall design, and AS 3700/AS 3600 for masonry and concrete. o Checks for sliding, overturning, bearing capacity, and global stability, including surcharge from the slab and footing. • Certificate of compliance (e.g. Form/Certificate as required in WA) for building approval. Please let me know how many business days you’ll need once I send the site information.
ID do Projeto: 40160082
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54 freelancers estão ofertando em média $475 AUD for esse trabalho

With my extensive background as a structural engineer, I'm confident I can deliver the comprehensive plans and designs needed to meet your project's strict requirements. My profound knowledge of NCC standards, AS 4678, AS 3700, and AS 3600, will ensure that your retaining wall meets all safety guidelines and design principles. Throughout my career, I have designed numerous complex retaining walls for varying soil conditions and loads which resonates with the challenges your project presents. Furthermore, my geotechnical experience promises I'll consider every possible factor to optimize the functionality of the earth-retaining structure. From soil improvement methods to incorporating a comprehensive drainage solution with gravel, agi pipe, weep holes to enhance its durability. Using the best available software resources like ETABS CSI, Robot Autodesk RSA, REVIT STRUCTURE AUTODESK, VISUAL ANALYSIS and more— gives me an unmatched ability to accurately generate a variety of plans and models required for your project. My proficiency in multiple languages (French, English,HaitianCreole and Spanish) enables ease of communication for us. Rest assured that by hiring me you'll receive the most robust design package, incorporating bill of materials for pricing estimation before ordering lumber and hardware
$750 AUD em 7 dias
8,1
8,1

Hi there, Its Cham , Chartered Eng,NER from Brisbane. I read your project info and happy to help you with engineering design, drawings and certification for the proposed retaining wall. Feel free to share more information (survey plan,location markup and soil report) on the project Looking forward to discussing more details Thanks Cham
$1.500 AUD em 8 dias
8,0
8,0

Hello there, I understand your need for a retaining wall design for your house extension project. With over [X years] of experience in structural engineering and building design, I assure you a comprehensive solution. I will design a 21m long, 1.3m high retaining wall using reinforced concrete masonry or timber/concrete sleepers, meeting all structural requirements and complying with NCC and AS standards. My deliverables will include permit-ready drawings, engineering drawings, and a bill of materials for pricing. To proceed, I'll need [X] days to analyze the site information provided. Looking forward to discussing the project in detail. What specific details or preferences do you have for the retaining wall design?
$250 AUD em 3 dias
7,7
7,7

Hello there! I have gone through your project brief, and I'd love to assist you get the desired result you need. I see you tagged Engineering Drawing, Building Regulations, Structural Engineering, Construction Management, Geotechnical Engineering, AutoCAD, Civil Engineering, Building Architecture and Building Design. Based off of your project description, I have some questions I'd like to ask. Don't hesitate to message me when you have the opportunity so we can talk more about this project. Best regards, Daniel Etie
$450 AUD em 5 dias
7,5
7,5

With over 16 years of experience in Architecture, I believe I have the necessary skill set to deliver high quality work for your retaining wall design project. My familiarity with residential building in particular, and my extensive knowledge in Civil Engineering and Structural Engineering make me a perfect fit for this job. Drawing from my previous experiences with projects involving retaining walls, soil stabilization and structural calculations, I can effectively deliver a design that would not only retain soil effectively and ensure safety but also satisfy local building department regulatory requirements. I work to maintain a meticulous approach to all my projects and this one will not be an exception. Overall, I enjoy working on scientific design which demands precise calculations like the one you've described - such as this project involves AS 4678 – Earth-retaining structures etc . That’s why I'm confident enough stating that choosing me will guarantee exceptional results in record time. Thank you for considering me. Looking forward to working together.
$800 AUD em 7 dias
7,1
7,1

As a seasoned engineering designer with a strong background in architectural and civil engineering, I possess all the skills necessary to create a top-notch retaining wall design for your house slab extension. My expertise in AutoCAD and structural engineering will ensure that your project meets, if not exceeds, all local building regulations outlined by NCC Volume Two-Part 3.1.2 and AS 4678, whilst still being tailored for residential use. I have successfully designed numerous retaining walls, incorporating crucial features such as soil retention, surcharge resistance, and drainage approach for optimum functionality - all aspects you specifically mentioned needing help with in your project description. Additionally, I not only deliver certified drawings in PDF format but always provide editable CAD files so you can continue modifying your plans as necessary significantly reducing future costs or design errors. Moreover, I am also capable of providing detailed bills of materials which can be extremely helpful in pricing timber and hardware before ordering. My goal is to ensure that there are absolutely no surprises during construction; the peace of mind resulting from this is immeasurable. Overall, my comprehensive engineering skillset paired with my attention to detail will enable me to produce a very reliable design that ensures your retaining wall is safe, cost-efficient and long-lasting - all while satisfying your expectations and requirements completely.
$260 AUD em 2 dias
7,3
7,3

Hello there! As an American Licensed Engineer leading a specialized Structural and Civil Engineering team with expertise in reinforced concrete masonry and timber retaining walls, we are well-equipped to design a robust retaining wall for your house slab extension project. With over 20 years of experience and comprehensive knowledge of NCC Volume Two, AS 4678, AS 3700, and AS 3600 standards, we ensure structural safety and compliance with all necessary regulations. Our deliverables include permit-ready drawings, a detailed bill of materials, and engineering drawings covering all elements of the retaining wall design. We guarantee a reliable and efficient solution tailored to your specific requirements. Cheers, RedBrick American Engineering
$250 AUD em 3 dias
6,7
6,7

Drawing on my extensive experience and expertise in AutoCAD, Building Architecture, Building Design, Civil Engineering, and Structural Engineering, I am confident that I am an excellent fit for your retaining wall design project. Not only am I well-versed in the specific design standards outlined in the project description (NCC Volume Two – Part 3.1.2 Earth retaining structures, AS 4678 – Earth-retaining structures, AS 3700 – Masonry structures, AS 3600 – Concrete structures), but I also have a deep understanding of the nuanced requirements and compliance measures pertinent to residential buildings. My skills extend beyond just designing - I'm familiar with local building codes and regulations and can ensure that our design stays within those parameters while delivering a solid and efficient structure. More so, having worked extensively with 2D/3D Modeling & Animation programs like Techla & Revit; it's easy for me to create accurate representations of the design right from start to end. The satisfactory completion of any engineering project hinges on not just skillset but tools used. As you've requested editable CAD files alongside bill of materials for budgetary considerations, rest assure my level expertise in various software means you'll receive long lasting documents in your preferred format including a bill of materials for timber or concrete sourcing. I look forward to collaborating with you on this project
$266 AUD em 1 dia
6,6
6,6

As a seasoned structural engineer and architect, my proficiency in utilizing Building Information Modeling (BIM) makes me a strong contender for your retaining wall design project. I am fully equipped and well-versed in the various software you mentioned like Revit and ArchiCAD, which will allow me to provide you with precise, accurate and data-rich models that can optimize the construction process while ensuring effective coordination throughout the project. Additionally, I have extensive experience in both 3D modeling and masonry work. I possess in-depth knowledge of the specific design standards and compliance regulations outlined in your project description, such as AS 4678, AS 3700, and AS 3600. I also have a thorough understanding of NCC Volume Two – Part 3.1.2 that you've mentioned. Essentially, by leveraging my skills and expertise, your retaining wall design would satisfy Performance Requirement P2.1.1 while reliably retaining soil, effectively resisting surcharge, dropdown, By complying with relevant regulations and delivering permit-ready digital drawings along with an item-wise bill of material analysis in PDFs as per your requirement.I ensure that there are absolutely no surprises once the concrete pouring begins.I eagerly await providing this crucial service to you. Thank you for considering my candidacy and I look forward to discussing further how I may be able to bring value to our collaboration.
$260 AUD em 1 dia
6,3
6,3

As a seasoned professional in the construction space with over 8 years of experience, I possess a unique skillset that aligns perfectly with your retaining wall extension project. Proficient in AutoCAD, Building Architecture, and Structural Engineering, I have a deep understanding of NCC Volume Two - Part 3.1.2 Earth retaining structures, AS 4678 Earth-retaining structures, as well as AS 3700 and AS 3600 for masonry and concrete designs. This enables me to ensure your project complies with all necessary regulations and standards. At its core, my work is designed to deliver peace of mind. By entrusting your project into my capable hands, you are guaranteeing optimal structure stability for your new slab extension. Drawing on my years of experience as well as advanced proficiency in AutoCAD and Building Architecture softwares I can complete your project both effectively and efficiently within the allotted timeframe. Now that you've laid out your vision allow me to make it into reality by handling all the nitty-gritty details on your behalf. Looking forward to hearing from you soon.
$261 AUD em 1 dia
6,5
6,5

I read your project details. I'm very much interested to do this project. I'm already experience in it. You can check my previous works at my portfolio section. Please provide some drawings for better understanding. Please message me for further discussion. I'll provide some of my previous work sample. I'll deliver required Design file according relevant code and detailed drawing file. You will get complete structural solution of following civil structures: 1. RCC Structures (Residential, Commercial, Industrial) 2. Steel Structures (Shed, Multistoried Mezzanine, Silo etc.) 3. Tower (Transmission, Telecommunication) 4. Poles (Steel, SPC) 5. Bridges (Steel, RCC, Composite) 6. Composite Structures (Residential, Commercial, Industrial) 7. Foundation (Single, Combined, Mat, Pile, SPC, Screw etc.) We work with the following Analysis, Drawing and Modeling software: 1. Staad Pro. 2. Etabs 3. MS Tower 4. Auto CAD 5. RAM Connection 6. SketchUp 7. Tekla 8. Revit 9. Robot 10. Advance Steel 11. ASDIP Foundation 12. SAP 13. Tekla Tedds 14. GRASP 15. Staad Foundation 16. CSI Detailing 17. MIDAS Civil
$250 AUD em 3 dias
6,2
6,2

Dear Sir, As a Structural engineer I am capable to design and deliver your project in both cad and PDF. I will provide all of the following detail design and drafting for your project. 1. Foundation Plan and Framing 2. Beams and Columns 3. Detailed drawings (Footings) 4. Water Proofing 5. Section Drawings 6. Notes, Legends and more Well Versed in; 1) Reinforced Concrete Structures 2) Steel Structures 3) Wood/timber Structures 4) Light guage steel structure 5) Re-strengthening of Existing RCC structures using carbon fibre 6) Pre-engineered steel Shed 7) Industrial Steel Towers For Design I am using following Software's 1) ETAB 2) SAP2000 3) Staad 4) Tekla Tedd's For drawings and detailing, I am using 1) AutoCAD 2) Tekla 3) Revit
$450 AUD em 5 dias
6,3
6,3

With a combined 12 years of professional experience in structural and geotechnical analysis and design, I am confident in my ability to deliver the retaining wall design you need for your house slab extension. Having worked extensively on projects like yours - including using advanced software such as PLAXIS for geotechnical analysis and Rocscience Slide for slope stability - I am proficient in producing detailed engineering drawings, structural calculations, and drainage detailing that align with AS standards. I understand the significance of structural reliability when it comes to retaining walls, especially in relation to building extensions. Design life compliance with AS 4678 and NCC guidelines? Rest assured, I will prioritize the project keeping these requirements in mind. My command over AutoCAD and Civil 3D ensures that your permit-ready drawings won't just be accurate but also editable for any future changes. Moreover, one key area of focus for this project is to prevent surprises down the line. And in that regard, I believe my expertise in materials estimation and cost management (with tools like Primavera) can provide value well beyond just the engineering aspects of the job. Balancing functionality, cost-efficiency, and your preferences for using either timber or concrete sleepers, I intend to complete this task diligently within a timeframe customized to meet your individual project needs.
$700 AUD em 6 dias
6,1
6,1

With Sakshi in your corner, you have a proven multi-disciplinary designer with deep experience in structural engineering. Most notably, I have knowledge of AS 4678, AS 3700, and AS 3600 standards which are vital to this project. Additionally, I am well-versed in interpreting local building regulations and delivering precise design plans that meet project specifications. What differentiates me from other freelancers is my keenness for detailed site assessment. With the basic survey you provided, I'm able to make clear estimates of dimensions and necessary levels ensuring no surprises when we embark on the actual construction phase. My extensive background in architecture and civil engineering enables me to provide top-notch designs for concrete masonry retainer walls with unequivocal stability and maximized efficiency.
$251 AUD em 1 dia
5,7
5,7

Hello Sir, I understand the need for a robust retaining wall design to support your house slab extension. With expertise in structural engineering and building design, I will create a reinforced concrete masonry wall with the necessary drainage and support elements. The design will comply with NCC, AS 4678, AS 3700, and AS 3600 standards, ensuring structural safety and stability. I will provide detailed drawings, engineering calculations, and a bill of materials for a seamless construction process. Let's collaborate to make your project a success. How can I assist you further with this project? How can I assist you further with this project?
$250 AUD em 2 dias
5,5
5,5

Hi there, I am an AutoCAD & Revit expert, Architect and Civil engineer. I checked your project details carefully and I have a great interest in your project. My experience in permit drawings will also come handy if there is a need for floor plans or any other such plan relevant to the project. If you want the permitting drawings, I can provide such as a floor plan, elevation, site plan, roof plan and MEP plans. I am confident that I can bring your specific ideas to life. Here is my service; ✨Creating workshop drawings, fabrication details, and construction-ready documentation ✨Converting from PDF/Sketch/Images to AutoCAD DWG and DXF files. ✨Interior & Exterior Design and Rendering by using Sketch Up, Revit, AutoCAD and 3Ds MAX. If you hire me, then your project will be completed more successfully. I am waiting for good news. Best regards Belal
$250 AUD em 1 dia
5,1
5,1

Hi, this is Mohand, a talented structural engineer based on Australian engineering standards with extensive experience designing residential retaining walls compliant with NCC Volume Two Part 3.1.2 and AS 4678. I'm excited about your "Retaining wall design for house slab extension" project and can deliver permit-ready drawings for your 21m long × 1.3m high wall supporting soil and concrete slab surcharge using reinforced concrete masonry (200mm Besser block, core-filled) or timber/concrete sleepers as preferred. My scope includes full structural calculations checking sliding, overturning, bearing capacity, and global stability per AS 4678/AS 3700/AS 3600, plus detailed drainage (gravel, geofabric, agi pipe, weep holes), footing/reinforcement plans, wall sections, and material schedules so you have zero surprises at pour time. With 10+ years designing 100+ retaining walls for slab extensions and residential builds, I've successfully navigated WA building approvals with first-submission passes. Portfolio includes similar 1.3m+ walls with slab surcharges, complete with stamped compliance certificates. Can complete the full package (PDF drawings + editable CAD + calcs + BOM + WA Form) in 5 business days once I receive your site survey, photos, and soil test data. Ready to start immediately—please confirm wall type preference and share files today!
$350 AUD em 7 dias
5,3
5,3

Hi [COULD YOU PLEASE VISIT MY PROFILE?] I am a structural engineer within 10 years experience in a steel, RC and wooden structures design. Prepare drawings and details, BILL OF MATERIALS I am experience to use Staadpro, Robot analysis, Advance steel, Revit ,Tekla , ideastatica ,RAM .. Please chat with me to discuss Regards
$500 AUD em 5 dias
5,3
5,3

Hi, I’m a multidisciplinary engineer focused on design + analysis, delivering production ready CAD and simulation-backed solutions. I work across mechanical and architectural scopes, with clear drawings, practical detailing, and fast communication. Feel free to check my profile for similar projects ,happy to review your scope and suggest the best next steps. G. Zaralı
$500 AUD em 7 dias
4,7
4,7

Hello, I understand that you're extending your house and require a meticulously designed retaining wall to support a new slab. With experience in structural and civil engineering, I will deliver permit-ready drawings, comprehensive calculations, and material schedules tailored to local compliance standards. Expect reliable results promptly as we ensure quality from the start. What specific timeline are you looking for once you provide the site information? Thanks,
$250 AUD em 1 dia
4,5
4,5

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