4080 User's Guide

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Number of Board Feet Based on Entered Volume....................38

CIRCLE AND ARC CALCULATIONS............................................39

Circumference and Area of a Circle...........................................39

Arc Length –

Degree and Diameter Known

...............................39

Arc Length –

Chord Length and Segment Rise Known

.............39

Arc Calculations –

Arc Length and Diameter Known

................40

ARCHED SEGMENT WALLS.......................................................41

Arched Segment Walls –

Arched Windows (No Base)

..............41

Arched Segment Walls –

Arched Windows (With Base)

...........42

Arched Segment Walls –

Chord Length and Segment Height

Known

.....................................................................................43

COMPOUND MITER.....................................................................45

Compound Miter Cuts................................................................45

CONCRETE/PAVING....................................................................46

Volume of Concrete for a Driveway...........................................46

Concrete Columns.....................................................................47

Complex Concrete Volume........................................................48

Polygon, Finding Angles Based on Entered Radius and

Number of Sides.....................................................................49

Concrete Footings (NOT AVAILABLE ON TRIG MODEL #4080)...........50

Squaring-up a Foundation .........................................................51

DRYWALL (NOT AVAILABLE ON TRIG MODEL #4080)...........................52

Number of Drywall Sheets for a Given Area..............................52

Number of Drywall Sheets for a Given Length..........................52

GRADE/SLOPE.............................................................................53

Back-Fill on a Slope –

Percent of Grade Known

.......................53

RIGHT TRIANGLE AND ROOF FRAMING EXAMPLES..............54

Roof Framing Definitions ...........................................................55

Degree of Pitch..........................................................................57

Percent Grade............................................................................57

Pitch Ratio or Slope...................................................................57

Common Rafter Length..............................................................58

Common Rafter Length –

Pitch Unknown

.................................58

Angle and Diagonal (Hypotenuse).............................................59

Rise............................................................................................59

Rise and Diagonal......................................................................59

Sheathing Cut............................................................................60

Regular Hip/Valley and Jack Rafters ........................................60

Jack Rafters –

Using Other Than 16-Inch On-Center

Spacing

..................................................................................61

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User's Guide - Page 6