Seneca Polytechnic OBC190 Module 4 - Imperial Scales & Drawings PDF

OBC190 Module 4 - Imperial Scales & Drawings Protected by copyright. Unauthorized use, reproduction, and/or 0 distribution is strictly prohibited. Units of Measurement Imperial – US only (since...

OBC190 Module 4 - Imperial Scales & Drawings Protected by copyright. Unauthorized use, reproduction, and/or 0 distribution is strictly prohibited. Units of Measurement Imperial – US only (since NFPA standards are American, Sprinkler design drawings in imperial) Inches (in) ( " ) Feet (ft) ( ̓ ) Yard (yd) Mile (mi) Units 1 in 1 ft 1 yd 1 mi in 1 12 36 63 360 ft 1/12 1 3 5280 yd 1/36 1/3 1 1760 mi 1/63 360 1/5280 1/1760 1 Protected by copyright. Unauthorized use, reproduction, and/or 1 distribution is strictly prohibited. Units of Measurement 1 foot = 12 inches ½ foot = 12 x ½ = 6 inches ¼ foot = 12 x ¼ = 4 inches 5/8 of a foot = ? inches 1’ = 12” 12” x 5/8 = 7.5” Protected by copyright. Unauthorized use, reproduction, and/or 2 distribution is strictly prohibited. Scales Drawing scales are rulers used to read drawing dimensions There are 2 types of scales (rulers): 1) Architect's Scale (imperial) 2) Metric Scale (metric) You have purchased 1 of each. Last week we looked at Metric Scales. Protected by copyright. Unauthorized use, reproduction, and/or 3 distribution is strictly prohibited. Imperial Scale Used when measurements and dimensions are in inches or feet.  1/2” = 1’-0” 1/2” on drawing = 1’ in real life Protected by copyright. Unauthorized use, reproduction, and/or 4 distribution is strictly prohibited. Imperial Scale Imperial scales have 2 scales on each edge − One scale reads left to right (values closer to outside edge, increasing from left to right) − Other reads right to left (values closer to inside edge, increasing from right to left) Is the 44 part of the 1/8 scale or the 1/4 scale? Protected by copyright. Unauthorized use, reproduction, and/or 5 distribution is strictly prohibited. Imperial Scale - Example Draw a line that is 4” long Use the 1:1 scale, draw from 0 to 4 a) Using the 1/8” = 1’ scale, what is the length of the line? Start your measurement at the ‘0’ This line ended at a number, but what if the line was between two values? Protected by copyright. Unauthorized use, reproduction, and/or 6 distribution is strictly prohibited. Imperial Scale - Example Using the same line and the 3/8” = 1’ scale, what is the length of the line? Start your measurement at the ‘0’ a) You will see the line falls between 10’ and 11’ b) Slide the scale to the left until the 10’ mark aligns with the left end of the line c) The marks on the right end of the scale (to the right of the ‘0’) represent the inches (or decimal) d) For the 3/8” scale, there are 12 segments (which works out well as there are 12” in 1’) What is the length of the line? Protected by copyright. Unauthorized use, reproduction, and/or 7 distribution is strictly prohibited. Imperial Scale - Example What is the length of the line? 10’-8” Protected by copyright. Unauthorized use, reproduction, and/or 8 distribution is strictly prohibited. Imperial Scale 1. Determine scale of drawing Usually found within title block of drawing Or under drawing label Each drawing can have a different scale so always ensure you check the scale Protected by copyright. Unauthorized use, reproduction, and/or 9 distribution is strictly prohibited. Imperial Scale 2. Select correct ruler scale to match the drawing scale Note where the ‘0’ value is on the scale. Begin your measurement there. 3. If there is an existing dimension on the drawing, I always like to double check using that dimension. Protected by copyright. Unauthorized use, reproduction, and/or 10 distribution is strictly prohibited. Imperial Scale Using the drawing titled ‘Imperial Drawing 1’: Scale is 1/4":1’-0” (noted in bottom right) Find a dimension – Check with your 1/4" scale − What are the dimensions of the Universal Washroom? Length and width. − What is the diameter of the barrier-free turn around in the Universal Washroom? − What is the dimension of the opening between the Corridor and Service Area? Protected by copyright. Unauthorized use, reproduction, and/or 11 distribution is strictly prohibited. Imperial Scale – Electronic Drawings Open the pdf drawing titled ‘Imperial Drawing 2’ from BB (under Module 4) Open the PDF using Adobe Acrobat DC Pro Determine the scale of the drawing (as noted) Change the scale of the pdf to that noted (as done in last class) Confirm the scale with a dimensioned drawing Remember 12” = 1’ so: 2’-6” = 12.5’ 3’-3” = 3.25’ Remember some tips: when measuring, if you hold the SHIFT key down, it will pace the measurement as a straight line If you hold the CTRL key down and scroll the mouse wheel, it will zoom in and out Protected by copyright. Unauthorized use, reproduction, and/or 12 distribution is strictly prohibited. Imperial Scale – Electronic Drawings Using ‘Imperial Drawing 2’ Door from Vestibule to Family Zone – door width? Dimensions of Male Washroom – length and width? Area of Universal Washroom? Protected by copyright. Unauthorized use, reproduction, and/or 13 distribution is strictly prohibited. Standard Drawing Sizes Protected by copyright. Unauthorized use, reproduction, and/or 14 distribution is strictly prohibited. Assignment 4 – Imperial Electronic Drawing Review Found on BB, under ‘Assessments’ To do Assignment 4, use the pdf drawing titled ‘Assignment 4 – Imperial Drawing’ Download the drawing and open using Adobe Acrobat Reader or Pro (available through Seneca MyApps) Due next week before this class starts Late penalty of 10% per day, up to 5 days (max. 50% after that) Protected by copyright. Unauthorized use, reproduction, and/or 15 distribution is strictly prohibited.