MODULE 2 - courses.ownerbuildercentre.com.au

1 NSW Owner Builder Course MODULE 2: Drawings and Estimating NEW SOUTH WALES OWNER BUILDER COURSE MODULE 2 DRAWINGS, ESTIMATING AND CASH FLOW CPCCOM2001 Read and interpret plans and specifications CPCCCM1011 Undertake basic estimating and costing TRAINING MATERIALS 2021 Edition OWNER BUILDER CENTRE 36 131 189 136 (RTO ID 91528) Ph: 1300 730 752 Email: NSW Owner Builder Course MODULE 2: Drawings and Estimating Owner Builder Centre 2021 2 INTRODUCTION 3 Chapter 1: Key features and functions of plans / drawings 4 Chapter 2: Recognise Amendments 21 Chapter 3: Recognise Commonly used symbols and abbreviations 23 Chapter 4: Locate and identify key features on a site plan 28 Chapter 5: Identify project requirements 32 Chapter 6: Read and interpret job specifications 34 Chapter 7: Estimating 38 Chapter 8: Developing the Project Cash Flow 68 Chapter 9: Job Costing 73 TABLE OF CONTENTS NSW Owner Builder Course MODULE 2: Drawings and Estimating Owner Builder Centre 2021 3 INTRODUCTION This workbook is about the skills required for: Read and interpret construction plans and specification Read and understand construction drawings Recognise the common signs, symbols and abbreviations used at construction sites and on construction drawings Understand the importance of adherence to quality in construction Carry out construction costings Undertake basic estimation and costing What will I learn?

2 The learning materials provide opportunities to develop employability skills that are learnt throughout work and life, to your job. Completed activities and summative assessments must be able to demonstrate competent employability skills in the workplace. Communication Communicate with clients, colleagues and others using effective and appropriate communication techniques Understands, interprets and applies information as required from relevant: plans and drawings, specifications, designs. Teamwork Works as part of a team to prioritise and action tasks Work cooperatively with people of different ages, gender, race, religion or political persuasion and people with disability Problem Solving Read and understand plans and specifications Initiative and Enterprise Identify and assess risks in the workplace Planning and Organising Selects and uses appropriate materials, tools and equipment Identifies requirements, applies relevant resources and sequences tasks using time management techniques Manage time and priorities to complete work Follow procedures and techniques relevant to the equipment and work being done Self-management Contributes to workplace responsibilities.

3 Such as current work site environmental/ sustainability frameworks or management systems Take responsibility for planning and organising own work priorities and completing assigned tasks Learning Understand equipment characteristics, technical capabilities, limitations and procedures NSW Owner Builder Course MODULE 2: Drawings and Estimating Owner Builder Centre 2021 4 CHAPTER 1: KEY FEATURES AND FUNCTIONS OF PLANS AND DRAWINGS This chapter will help you learn about the following: Construction plans, drawings and specifications Types of plans and drawings used in construction industry Key function of each type of drawing Construction Work requirements Quality requirements Environmental controls and management in construction Main types of plans and drawings used in the construction sector Drawings / plans generally convey the following important information: Geometry the shape of the object is represented as views how the object will look when it is viewed from various angles, such as front, top, side, etc.

4 Dimensions the size of the object is captured in accepted units. The internationally accepted unit systems are SI system or FPS system. The International System of Units (French: Syst me international d'unit s, abbreviated as SI) is the modern form of the metric system. In SI, length is mentioned in meter, weight in kilograms and time in seconds. Tolerances the allowable variations for each dimension. Material represents what the item is made of. Finish specifies the surface quality of the product. For example, the finishing for a wooden door may be mentioned as painted or stained. Illustration Drawings These drawings show what the end result will look like, but they are not to scale. Construction Plans The construction plans or drawings show the sequence in what is to be built. Site Plan The site plan shows an outline of a house in relation to north, neighbouring houses and the roads, as well as items such as the following, and you can orientate the site plan to the actual site by aligning actual site feature to ensure you are looking at the plan in the right direction: The property boundary An outline of the house Adjacent properties and any roads Existing fences Any easements Existing trees Contour lines and levels Driveways and paths NSW Owner Builder Course MODULE 2: Drawings and Estimating Owner Builder Centre 2021 5 Key Features of a Site Plan include: Location - Shows where the site is located Patterns - Shows things like fencing, bricks, tiling, balcony, patio, etc.

5 Dimensions & Sizes - Shows how tall, long, wide objects are, as well as their scale Quantities - Shows how many of something there are NSW Owner Builder Course MODULE 2: Drawings and Estimating Owner Builder Centre 2021 6 Floor Plan The floor plan shows the relationships between rooms and spaces of a certain floor of the house/building. Elevation View Plan An elevation view is that you would see in real life as you stood on the ground in front of your house and look at it from front. This view can be either an exterior or interior view. The Elevation Views of a House (as can be seen from various directions) NSW Owner Builder Course MODULE 2: Drawings and Estimating Owner Builder Centre 2021 7 Cross-Sectional Plans Sectional drawings show helpful data such as floor levels, roof features and basic topography.

6 You will get a view of a cross section of parts of the building including the elevation measurements to aid planning of your building project. Engineering Plans The structural drawings are engineering drawings that depicts how the structure will built. Structural drawings show the load carrying members of a structure and outline the size/types of material to be used to build that structure. A structural drawing NSW Owner Builder Course MODULE 2: Drawings and Estimating Owner Builder Centre 2021 8 Composition of a drawing: A typical construction drawing consist of: 1. Views and Sections: It could be a top-view, front view, side view or a section of the object that is shown. The views are projection of the object as it will look from top, front or side.

7 Top view is called as the plan view , Front view is called as the elevation view and side-view is called as the side-elevation view . The photo below shows these three views of the same object. As you may notice, for the same object: Front view (Elevation) is a rectangular box Top-View (Plan) is an L-Shaped figure. Side-View (Side-Elevation) is a polygon with five sides (a corner cut from a rectangle) 2. Drawing Details: Drawing details are the representation of minute details of the object. NSW Owner Builder Course MODULE 2: Drawings and Estimating Owner Builder Centre 2021 9 3. Notes: Notes are written on the drawing to convey general or any specific information. For example, refer to notes shown in the below picture as taken from an engineering drawing.

8 4. Legends, Symbols and abbreviations: The notes and legends section of a drawing lists and explains any special symbols and conventions used on the drawing, as illustrated below: NSW Owner Builder Course MODULE 2: Drawings and Estimating Owner Builder Centre 2021 10 5. Schedule: The schedule is shown on the drawing to quantify the material used. 6. Title block: The Title block is the space on the drawing where drawing title is written. Refer to section for more details son Title block of a drawing. 7. Scale: Engineering drawings are usually "scale drawings", meaning that the plans are drawn at specific ratio relative to the actual size of the place or object. Various scales may be used for different drawings in a set. For example, a floor and elevation plans may be drawn at 1:100 (100cm length of the actual object = 1cm on the drawing) whereas a detailed view may be drawn at 1:50 (50cm length of the actual object = 1cm on the drawing).

9 Scale of the drawings is represented as Scale: 1:50 . Sometimes, for ease of representation some (all) objects are not drawn to the same scale. In such drawings, a note may be written as Not to Scale or in the abbreviated from Scale: NTS . NSW Owner Builder Course MODULE 2: Drawings and Estimating Owner Builder Centre 2021 11 Other project documents Construction Specifications Specifications describe the materials, installation techniques and quality standards for what is to be built. The purpose of construction specifications is to define the requirements regarding the materials, products, workmanship and finishes, installation procedures and quality aspects involved in the execution of a construction project.

10 Specifications can broadly be classified as: performance specifications and prescriptive specifications. Performance Specifications is a document that specifies the operational requirement of component, fitting or material. The general concept behind the performance specification is for the architect or design engineer to describe what they need, and the contractor to determine the best way to get there. Performance specifications can thus be called as open-end specifications as it leaves the room for the construction contractor to choose a product or material from a range of available options. Perspective Specifications is a document that conveys the requirements of a project through a detailed explanation of the type and quality of materials that the contractor must use. These specifications also determine how this specific type/quality of material is used, applied or installed.