CMP 305 - Test 2 - CMP 305: Site Construction and Layout I....

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CMP 305: Site Construction and Layout I. September 2, 2009 a. Construction Restrictions i. Set backs from roads ii. Clearance from property lines 1. Residential vs commercial 2. Utility lines, gas, water, sanitary b. Plot plans i. Required before a building permit is issued ii. Shows the location of the structure and indicates the distances to property lines iii. Survey provides the measurements for this plan c. Purpose of leveling i. For planning 1. To establish the necessary elevations to develop plans for such structures as buildings, roads, terraces ii. For layout 1. To assure the structures are built according to the elevations shown on the plans d. Types of leveling i. Differential 1. Finding the difference in elevation between two points ii. Profile 1. Determining the elevation of points at measured distances along a selected line iii. Topographic 1. Determining the elevation of spaced grid points 2. Uses contour lines to show hills, valleys, and slopes e. Types of Levels i. Construction level
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1. Dumpy 10-20x, simple 2. Straight line measurement 3. 4 leveling screws ii. Self compensating units 1. 3 screws, cat’s eye for vial iii. Transit and Theodolites 1. Both work in the vertical and horizontal plane, rotate angles, ver- tical measurement a. Transit-more traditional with few automatic features b. Theodolites- iv. EDMI (electronic distance measurement instruments) 1. Added the distance component to the theodolite v. Total Station 1. Theodolite with a computer, automatic angle reading capabilities and distance measurement vi. Laser level 1. Light beam a. Color? 2. Cost is higher 3. Distance of 500-1000 feet a. Rotating head or cone 4. Advantages a. Only one person needed to get work done b. Can be mounted to construction equipment to control hy- draulic system vii. GPS Systems 1. Not the traditional level in concept f. Equipment selection i. Choose what you need ii. Simple-low maintenance
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iii. Store in container and keep dry iv. Inventory your equipment g. Linear measurement i. Pacing-measured by counting steps ii. Odometer-wheel attached to handle iii. Stadia 1. Optical measurement of linear distance 2. Stadia hairs a. Difference between the top and bottom stadia hair is 1/100 of the distance between the instrument and the rod iv. Taping 1. Steel, fiberglass or fabric a. Up to 500’ b. construction is 300’ v. EDMI 1. Angle measurement 2. More accurate than conventional survey 3. Light waves bounce off a prism 4. Calculates distance 5. Info is downloaded for prints/drawings vi. Total Station vii. GPS II. September 14, 2009 a. i. Why do it? 1. Engineers, Architects, and Owners a. Time and money 2. Place building on proper site a. River Falls example
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ii. Building facing correct direction iii. Survey/Stake out iv. Limits the possible errors 1. Bank-lending institutions may require it v. if professionals don’t do it you need it vi. simple checks 1. Locate legal description of the property a. Check plot plan
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This note was uploaded on 05/01/2010 for the course CMP 305 taught by Professor Welch during the Spring '10 term at Michigan State University.

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CMP 305 - Test 2 - CMP 305: Site Construction and Layout I....

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