Introduction To Isometrics For Plumber’s Contractor Exam
Introduction To Isometrics For Plumber’s Contractor Exam
Introduction To Isometrics For Plumber’s Contractor Exam
Welcome to Contractor Campus, today we will be discussing Isometrics! What is Isometric. Isometric rendering, or drawing, is a technique used to geometrically portray three-dimensional objects in a two-dimensional view on a one dimensional plane. It is used primarily in technical and engineering drawings, but has other uses as well. As a “3D” drawing, an isometric drawing dimensionally depicts three sides of an object, all in proportion. But none of the sides, or “views,” are typically shown with 90 degree corners. Instead, all horizontal lines are drawn at a 30 degree angle to the base line, while all vertical lines remain vertical. Once the concept is mastered, isometric drawing is a very easy and highly accurate method for drawing three-dimensional images. You may be asking yourself, Why do I need to understand isometrics? Creating isometric drawings is an active and important part of the Certified Plumbing Contractor Exam. As a matter of fact, if you do not pass the isometric portion of the exam, then you fail the ENTIRE exam! So, as you can see, it is very important for you to understand the concepts and be able to create quick, accurate isometric drawings if you wish to become a Certified Plumbing Contractor.
Introduction To Isometrics For Plumber’s Contractor Exam
Introduction To Isometrics For Plumber’s Contractor Exam
Additionally, being able to understand and create isometric drawings can become a valuable tool! To get started in learning how to create accurate Isometric drawings, it is necessary to have a basic understanding of geometry. Geometry is a branch of mathematics dealing with spatial relationships, or shapes. Let's start with a drawing of a simple, single-dimension box. The next item on the screen is the same box drawn isometrically. Notice in the isometric example that the vertical lines remain vertical, while the horizontal lines are drawn at a 30 degree angle.
Introduction To Isometrics For Plumber’s Contractor Exam
Introduction To Isometrics For Plumber’s Contractor Exam
This 30 degree angle can be drawn in either direction, depending on which perspective of the object you wish to view. Here is an example of a floor plan all you will see is a layout. We have a lavatory, water closet, a wet bar, a kitchen sink and a washing machine and they want us to come up with a isometric drawing. Next thing we need to know is where the water is all going to go, we need to know where the building drains. We also notice the difference in elevation, the elevation here is 120 feet and my elevation here is 128 feet, so we have an 8 foot difference in elevation. It is very important to know all these things because the next couple of lines on this isometric drawing are going to be crucial, if the first or second line is messed up, the entire problem will be incorrect. Let's start a drawing with a 30 degree line, before we start with that, let me explain to you what we mean by a 30 degree line, this right here is a typical plane and this is the y axis and the x axis, most people know this is as 90 degrees, so if i asked you to draw a 90 degree line, you will draw a vertical line, how about a 0 degree line, it would be a horizontal line.
Introduction To Isometrics For Plumber’s Contractor Exam
If we asked you to draw a 45 degree line, where would the line go? In this situation many people will pull out their protractor, a protractor is a circular or semicircular template tool for measuring angles, divided evenly by 360 rays to form a complete circle or by 180 rays to form a half circle, the two most common forms of the tool. This tool isn't needed right now, you will use isometric paper. Isometric paper is a type of drawing or drafting paper that is printed with fine lines making up a regular grid. The lines can be used as precise 30 degree guides for drawing isometric diagrams. It is referred to as quad-ruled paper as there are four sets of intersecting lines; horizontal lines, vertical lines, and 30 degree diagonal lines in both directions.This is what an isometric paper will look like.
It is always a good idea to use a pencil and not a pen because if a mistake is made on the exam you can simply erase it! The 45 degree would be between the 90 degree line and the 30 degree line. When we are drawing our isometric drawing, the 90 degree line represents any vertical distances that shows up and down. When drawing your isometric drawing we will use the 90 degree line, and then we will be using the 30 degree line for the walls, this is very important, 30 degree lines represent the walls! This red line here, is the main line, why? Because there are a bunch of lines coming off of it, so let's draw the 30 degree line, now let's move the isometric image, 30 degrees counterclockwise. Here we have a color guide, the color guide will help you see what is what! The red line represents the Main line, the green line represents the Building Drain, the orange line represents the Kitchen sink, the blue line represents the Wet bar, the purple line represents the washing machine, the brown line represents the Lavatory and the black line represents the Water closet.
Before we start, we want to let you know on the right corner we have the 2 dimensional layout as a reference! Now lets begin with the main line, our main line is very important, it will be in a 30 degree angle, when we draw we label everything before going to the next part then we will add the building drain, for the kitchen sink it will look like this but we also have a ventilation, ventilation is a system that allows a way to balance the pressure on both sides of a trap, meaning the trap will hold the water which is needed to maintain effectiveness of the trap, and avoiding trap suckout. We need to add the VTR, ventilation through roof, meaning this needs to be ventilated, make sure you count all the units, now let's add the the wet bar, we have another VTR here,now the washing machine, we have another VTR here, now let's add the lavatory and the water closet, there is another VTR here as well. As you can see we have an isometric drawing, but what we want to mention are these small lines that go in the main line, they are at this angle because it is supposed to show flow of the water.
It is very important to add these lines going in the direction where the water flows. Make sure to label! It is very important to know which line means what! Now, for those test takers, on the exam they are looking for three things! 1. The drawing must look like a 3D drawing! Which is what we have. They want an isometric drawing, 2. They want you to label everything, they need to know what you are labeling and what it is, as you can see everything is labeled! Then 3. We need to show Ventilation, which has been shown on our isometric drawing, this is how a completed isometric drawing should look like! Make sure you have all three, it is very important! Once you have completed all three you should be fine on your exam! Thank you so much for watching our video Make sure to click the subscribe button to be apart of our Contractor Campus family and to be updated on anything related to contractor licensing!