Understanding Construction Drawings: Key Concepts and Symbols
School
Michigan State University**We aren't endorsed by this school
Course
CMP 210
Subject
Biology
Date
Dec 11, 2024
Pages
6
Uploaded by DeanFinchMaster1192
CMP 210 –Commercial Methods and Materials Assignment #3Introduction to Plan Reading Assigned Thursday, September 5, 2024. Due –Thursday, September 12 at 11:59PM 10 Points This is an individual assignment Introduction In the following paragraphs, you will learn about overall plan organization concepts and symbols used on project plans. Organization of Construction Drawing Sets Construction drawings, also called working drawings, depict the location, form, size, quantities, and materials used in constructing a building. Construction drawing sets can include several hundred (or even thousand) drawings, especially for very large, complex projects. These are often divided into Drawing Series, organized based on discipline, and include civil, architectural, structural, mechanical, plumbing, electrical, fire safety, and other specialty trades. Drawings are then numbered sequentially within these lettered sets; the first sheet of a drawing set is usually the “Index of Drawings”or “Sheet Index.”These discipline-specific series are typically grouped as follows: A architectural drawings C civil/site drawings E electrical drawings G general overall project information M mechanical drawings P plumbing drawings (sometimes combined with M-series) S structural drawings L landscape and plantings
CMP 210 –Commercial Construction Methods Introduction to Plan Reading 2 TheTitle Blockis typically found at the edge of a construction drawing. This block contains several important pieces of information, including: Sheet number Drawing title Project name Designer information Key plan (not shown on this Title Block) Record of revisions Drawing scale Location of project north (This is often towards the top of the sheet, as you are looking at it, but not always) Sometimes a legend and sheet notes will also be present in this area of the drawing Review the Title Block shown to the right and identify the items noted above.
CMP 210 –Commercial Construction Methods Introduction to Plan Reading 3 Navigating Construction Drawings Grid lines are used on construction drawings, particularly on large and complex drawings. They will appear on all the types of prints described on Page 1 above. They are similar to grid lines on road maps and are used in the same way, to help locate a specific area of the project on a given drawing. One side of the drawing will typically have a series of numbers, with connecting lines attached to the perimeter and passing through to the other end. One the top or bottom of the drawing, a series of letterswill typically be present. The combination of a letter and number are used to show a specific object or item on the prints. The grid lines typically align with structural steel elements used on the project. Each piece of steel will often have its location, expressed as a letter-number combination, painted onto it. This method also allows contractors to specify the points midway between grid lines, and express letters and numbers using decimals –e.g., A.2, 4.5, etc. Some letter and numbers may be omitted from the gridline system to avoid confusion. These may include 0, 1, I, O, and Q, although this is not always the case. By referring to prints, it is possible to orient oneself on a construction site by looking for letters on steel columns
CMP 210 –Commercial Construction Methods Introduction to Plan Reading 4 Key Plans and Match Lines On large projects, a single building or area of the project site will have to be broken into multiple sheets. In this case, a key plan is used on each sheet, which helps identify which part of the larger project a drawing belongs to. The shaded area of a key plan appears on other drawings; the unshaded portion is what is shown on the drawing that shown on the subject sheet/page. This project is broken up over four separate drawing sets, A-D. This means there is a separate set of drawings for each letter. There will be a Match Lineon each drawing that separates each section; there is typically a little overlap from one section to the other. As you move from one drawing to the next, pay close attention to the match line. This especially important if you are counting items (called a materials takeoff) on neighboring sheets. You will need to carefully compare these sheets to make sure you are counting accurately.
CMP 210 –Commercial Construction Methods Introduction to Plan Reading 5 Orthographic Drawing Architects use orthographic drawings to simplify complex designs into easier-to-understand drawings. Drawings typically are shown in one of the following three views: Plan view –a representation looking down on the building; a floor plan is that same downward-looking view after a horizontal slice has been made through the building. Section view –a view of a building or portion of a building after a vertical slice has been made through the building. A section line is provided on a corresponding plan view drawing, with arrows indicating the direction of view. Details are typically in section view. We will cover this in greater detail in future labs. Elevation drawing –the exterior façade of the building, typically in one cardinal direction (i.e., north, south, east, west), showing geometries and construction materials.
CMP 210 –Commercial Construction Methods Introduction to Plan Reading 6 Navigating Construction Plan –Test Your Knowledge Note: If necessary outside references may be consulted to complete these activities Organization of Construction Drawing Sets 1. On what Series of print (A, C, M, etc.) would you expect to find structural steel framing plans? 2. On what Series would you expect to find site grading plans? 3. On what Series would you expect to find exterior elevations? 4. On what Series would you expect to find the sheet index? The following questions refer to the title block on page 2: 5. What is the sheet number and drawing title? 6. Which direction on the sheet is north (Use a clockface reference, such as 12:00 = North, 6:00 South)? 7. What firm prepared the drawing? Navigating Construction Drawings: 8. On the key plan example on page 4, the match line is between which two grid lines? 9. On the key plan example on page 4, the match line divides which two building areas? 10. What is the scale used in the drawing on page 4? 5StructuraldrawingsccivilsitedrawingsAarchitecturaldrawingsGgeneraloverallprojectinfofirstpage51.0.0Plantsciencesbuilding1200NorthSmithGroupHandJdividesDfromBandC181