WEEK 1 LEC 1 Measurements for Construction: Course Fundamentals and BOQ Preparation
Unit Introduction and Teaching Personnel
Unit Information: The unit is titled "Measurements for Construction," focusing on the vital skills and knowledge needed for professionals in Quantity Surveying (QS) or Construction Management (CM). This unit is also crucial for architects and project managers as it provides foundational understanding necessary in executing and managing construction projects effectively.
Participant Volume: This unit traditionally enrolls approximately students, facilitating a diverse and dynamic learning environment where various perspectives contribute to discussions and project work.
Primary Contacts:
Lecturer and Unit Coordinator: Dilakshan, who oversees the curriculum and ensures that all academic standards are maintained.
Unit Tutors: A dedicated team including Krystal Lakkana, Kanchukwa, Isurya, and Dahami, assisting students in tutorials and offering personalized guidance through their learning journey.
Curriculum Scope: Students will engage in structured projects during tutorials, which are designed to amalgamate theoretical knowledge with practical applications. Additionally, there will be a comprehensive assessment project and two significant exam projects. Overall, the unit encompasses a total of projects that cover a wide range of construction scenarios, including domestic building practices, small-scale commercial projects, and the complexities of third-story commercial/industrial buildings.
Unit Overview and Key Terminology
Core Objective: The primary goal is to introduce and develop competencies in activities conducted by construction cost management professionals. This includes mastering the preparation of a Bill of Quantities ( or ) and the associated documents crucial for outlining project costs.
Three Pillars of Construction: Construction fundamentally hinges on the management of Cost, Time, and Quality. This unit lays a critical groundwork in managing these elements, with a specific emphasis on cost control and budget management, facilitating informed decision-making throughout the lifecycle of construction projects.
Element vs. Trade:
Element: This refers to a physical and visible part of a building as identified by observers (e.g., a concrete slab, flooring, or an external wall).
Trade: This aspect pertains to the specific craft or materials necessary to build an element. For example, a concrete slab is classified as an element; various trades that contribute to its construction include concrete pouring, formwork installation, and reinforcement placement.
Example (Slab): The concrete slab is an element that necessitates collaboration among several trades to create a safe and durable structure.
Example (External Wall): In the case of an external wall, the wall itself serves as the element, and the associated trades include the installation of external cladding/face brick, insulation layers, internal lining, and structural framing techniques, whether carpentry or metal components.
Standardized Measurement and Industry Bodies
Standard Method of Measurement: The unit primarily adopts the standards set forth by the AIQS (Australian Institute of Quantity Surveyors), specifically utilizing the Australia and New Zealand (ANZ) Standard Method of Measurement (2022 version), which ensures consistency and transparency in measurement practices across projects.
Alternative Standards:
Civil Engineering Standard Method of Measurement (CESMM): This standard is crucial for infrastructure-related projects, including roads, bridges, culverts, and hydraulic works, ensuring that specialized measurement processes are followed.
RICS (Royal Institution of Chartered Surveyors): This institution offers an international pathway for aspiring quantity surveyors and cost managers, thus broadening professional opportunities for graduates.
Professional Progression: Students are encouraged to register as student members of AIQS to start accruing relevant experience hours. Upon graduation, and after completing two years of cadetship or professional experience, individuals can apply for certification as a Quantity Surveyor, enhancing their credentials and career prospects.
Typical Construction Project Workflow
The Principal (Client/Employer): This is the individual or organization that initiates the project by providing funding and conceptualization. While they are the driving force behind the project, they often lack the technical construction knowledge necessary for effective decision-making (e.g., a physician developing a healthcare facility).
Leading Consultant (Architect/Project Manager): This professional translates the client’s ideas into a structured format within “construction language,” incorporating detailed drawings and plans necessary for project execution.
Consultant Team:
Architects: Focus on the spatial arrangement and aesthetic design of the building, ensuring that it meets functional and visual expectations.
Structural Engineers: Responsible for assessing and designing building components such as beams, columns, and trusses to ensure they can bear expected loads and comply with safety regulations.
Service Engineers: Specialize in the integration of essential systems within the building, including electrical, mechanical, plumbing, and drainage systems.
QS/Cost Consultant: The QS prepares cost plans and budgets derived from architectural and structural designs; this role is integral in helping the leading consultant maintain financial viability throughout the project.
Design Optimization: In instances where initial estimates exceed the client’s budget, which might be $12,000,000 against a budget of $7,500,000, the design team must work collaboratively to optimize the designs. This can involve reducing the project’s floor area, omitting luxury elements (such as swimming pools), or selecting more cost-effective finishes to realign with financial constraints.
Construction Documentation and Drawing Types
Plan: Provides a top-down view of the building layout, facilitating the visualization of spatial relationships among different elements.
Elevations: Side views of the building that are typically labeled with cardinal directions (North, South, East, West) to provide context pertaining to the structure's orientation.
Section Details: Displays critical cross-sections of the building, showcasing internal details at specific cut-points. Understanding these elements is vital for comprehending how different building components, such as roofs and walls, are constructed and connected.
Specification: A comprehensive document that delineates quality specifications for materials and construction practices that cannot be depicted purely in drawings. This includes concrete grades (e.g., vs. ), tile dimensions, and material ratios, alongside any required tests (e.g., slump tests).
Schedules: Detailed listings for repetitive items, such as doors, windows, and finishes (e.g., types of carpet for specific rooms), which ensure that all components are accounted for in the project.
Drawing Notes: Crucial textual annotations on drawings that provide additional context or clarification about specific details or requirements.
Drawing Register: A comprehensive log documenting all drawings and their revisions to ensure that all involved parties are utilizing the most current and accurate information throughout the project's execution.
The Bill of Quantities (BOQ) Structure
Definition: A meticulously structured document specifying the quantity and quality of work required for effective building construction. The BOQ serves as the cornerstone for tendering and cost management in construction projects.
BOQ Column Format:
Page number.
Item reference.
Heading (Trade designation, e.g., in situ concrete).
Sub-headings providing clarity on specific tasks or materials.
Unit of measurement (e.g., cubic meters, square meters).
Quantity detailing the total measured amount.
Rate (Price per unit) allowing computation of project costs.
Total Price calculated from the quantity and unit rate.
Price vs. Cost Formula: The project's financials are summarized with the formula , which is fundamental in developing bid prices.
Preamble Clauses:
General Preambles: Outline the accepted measurement standards (e.g., utilizing ANZ guidelines) and practices applicable in the project.
Pricing Preambles: Define what is included in given rates, ensuring transparency in pricing processes and expectations.
Procurement and Tendering Process
Tendering/Bidding: This critical process involves selecting an appropriate contractor for the project. Information pertaining to the project is disseminated to prospective contractors, who then submit their proposals or bids based on the provided specifications.
Contractor Categories: Contractors may be categorized into Tier 1, Tier 2, or Tier 3, signifying their experience and capacity for project execution. Additionally, there are domestic contractors designated for smaller or localized projects.
Evaluation Criteria:
Commercial Viability: This aspect focuses on evaluating the financial aspects of the bid, ensuring the proposed amount aligns with budget expectations.
Technical Viability: This evaluates the contractor’s capability to manage complex projects, assessing past projects and technical proposals (e.g., those involving intricate structures like casinos).
Modern Australian Practice: It is increasingly common for consultants to convey general quantities only in the BOQ, placing the onus on contractors to independently verify and measure quantities of materials and labor, thus assuming liability for measurement accuracy.
Post-Contract Administration
Progress Claims: Contractors are required to submit claims periodically (typically monthly) based on the percentage of work completed as outlined in the BOQ summary, ensuring cash flow management for both parties involved.
Advance Payments: These are typically rare in Australia except where specified in contract terms, reflective of common practices in regions such as Singapore or the Middle East. Generally, contractors are responsible for funding initial project mobilization.
Variations: Changes to the contract amount are permissible in cases of unforeseen circumstances (e.g., differing soil profiles from initial site reports) that necessitate alterations to the scope of work and associated costs.
Project Scheduling: The expected timeline for project milestones is often derived from established "work norms," which dictate the number of hours deemed necessary to complete defined tasks (e.g., completing of a particular task).
Practical Measurement Tools and Procedure
Required Materials: Effective measurement during construction requires specific tools, including an architectural scale ruler, highlighters, pencils, pens, a calculator, and organized takeoff sheets for detailed record-keeping.
Scales: Common scales utilized in construction drawings include , each serving different purposes depending on the level of detail required.
The Takeoff Sheet: This document comprises several essential columns, including Item Number, Description, Unit, Factor, Length, Width, Depth/Height, Extended Quantity, and final rounded BOQ Quantity, streamlining the process of data entry for measurement.
CORI (Query Sheet): A formal communication tool used to clarify discrepancies or absent data in drawings, enhancing collaboration and accuracy in project execution.
Software: Students will be introduced to CostX software for automated digital takeoffs during later weeks (from weeks to ). However, manual measurement skills will be necessary for Assessment to ensure foundational competency.
Assessment and Timeline
Academic Integrity: Students must maintain strict adherence to QUT policies regarding academic misconduct, ensuring fairness and integrity in assessments.
Assessment 1:
Part 1 (Individual): Involves a takeoff exercise for a weatherboard external wall house, due in Week 6, comprising a total of marks.
Part 2 (Group): Focuses on roof structures, metal sheeting, and finishing aspects, with a due date in Week 10, also accounting for marks.
Central Exam: This will concentrate on a total assessment of a comprehensive two-story residential building project (Project 5), reinforcing learned concepts through practical application.
Group Formation: The deadline for voluntary formation of project groups is August ; following this date, an automatic assignment will be conducted via Canvas to ensure distribution across teams.
Printing Instructions: For accuracy, drawings must be printed at "Actual Size" to maintain scale integrity, preferably using or paper as specified in the project guidelines.