LESSON 3.pptxMFGGJFGJFFGFGFGFFFGFFGFGFGFGFGGGFGFGFFG

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1. Perform Mensuration and Calculation

2. LEARNING OUTCOMES: At the end of this Lesson, you are expected to do the following: LO 1. select measuring instruments; and LO 2. carry out measurement and calculations.

3. TYPES OF MEASURING TOOLS

4. HANDLING OF MEASURING INSTRUMENTS / TOOLS A. DO’S 1. Wipe measuring tools/instruments before returning them to the storage room. 2. Oil the movable parts of the measuring tools such as zigzag rules, calipers, dividers and compasses to avoid stock-up. 3. Make sure that grits like sand do not get inside the housing or case of a pull-push rule to avoid wearing off of the graduations. 4. Check the lock of a pull-push rule if it is working.

5. B. DON’T’S 1. Do not wipe off edges of the steel tape of pull-push rule with bare hands to avoid injury. 2. Do not pull the steel tape of pull-push rule too much to avoid the coil spring from damage. 3. Do not use the caliper as tongs.

6. LINEAR MEASUREMENTS FOR THE 6 FACES OF LUMBER

7. A lumber has 6 faces: 2 ends, 2 edges and 2 surfaces

8. Hence; the linear measurements obtained are: 1. End 1 to end 2 or A B = Length (L ) 2. Edge 1 to Edge 2 or C D = Width ( W ) 3. Surface 1 to surface 2 or E F = Thickness / Height ( T / H )