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CONSTRUCTION MASTER ®

CONCRETECALC ™ PRO

ADVANCED FEET-INCH-FRACTION CALCULATOR

Model 4225

Designed for today’s concrete professional,

the all-new ConcreteCalc Pro adds even

more power to the already powerful

Construction Master line-up. Like earlier

models, this calculator is so simple to use,

even the novice user can easily solve

dimension-related problems.

•Solve Dimensional Math with Ease

•Dimensional Conversions

•Imperial/Metric Conversions

•Weight/Volume Conversions

•Rectangular Area/Volume Calculations

•Block Quantity Solutions

•Footing Volume Calculations

•Instant Square-Up (Diagonal) Solutions

•Drop Distance Calculations

•Circular Area and Circumference

•Arc Length Calculations

•Calculate Stair Risers, Treads, Stringers

and Inclination Angle

•Material Estimations

•Paperless Tape

CONCRETECALC™PRO

GETTING STARTED ...............................1

Key Definitions.....................................1

Preference Settings ...........................11

Entering Dimensions .........................13

Conversions.......................................14

Basic Math Operations ......................16

Percentage Calculations....................17

Memory Operation.............................18

Paperless Tape..................................19

USING THE CONCRETECALC PRO...20

Length, Width, and Height Keys........20

Circle Calculations.............................23

Squaring-Up a Concrete Slab ...........26

Calculating Rebar ..............................27

Calculating Loads ..............................29

Blocks and Bricks ..............................30

Polygon (Equal-Sided).......................31

Concrete Footing ...............................32

Finding Weight Per Volume...............33

Concrete Bags...................................33

Calculating Drop ................................34

Stair Calculations...............................36

APPENDIX ............................................40

Accuracy/Errors .................................40

Battery and Auto Shut-Off .................41

Default Settings .................................42

Area Formulas ...................................43

Surface Area and Volume Formulas..44

REPAIR AND RETURN.........................45

Warranty, Repair and Return

Information.......................................45

WARRANTY ..........................................46

TABLE OF CONTENTS

POCKET REFERENCE GUIDE — 1

KEY DEFINITIONS

Basic Function Keys

+ – x Arithmetic operation keys.

÷ =

%Four-function (+, –, x, ÷)

percent key.

0– 9Keys used for entering

and •numbers.

OOff Key — Turns all power

off, clearing all non-perma-

nent registers.

oOn/Clear Key — Turns on

power. Pressing once clears

the display. Pressing twice

clears all temporary values.

ÇConvert Key — Used with

the dimensional keys to

convert between dimen-

sions or with other keys to

access special functions.

TStore Key — Used for stor-

ing values.

®Recall Key — Recalls

stored values.

GETTING STARTED

POCKET REFERENCE GUIDE — 2

Unit Keys

yYards Key — Enters or

converts to Yards.

fFeet Key — Enters or con-

verts to Feet as whole or

decimal numbers. Also

used with the iand /

keys for entering Feet-Inch

values (e.g., 6 f 9

i1/2). Repeated

presses during conversions

toggle between Fractional

and Decimal Feet.

iInch Key — Enters or con-

verts to Inches. Entry can

be whole or decimal num-

bers. Also used with the /

key for entering fractional

Inch values (e.g., 9 i

1 / 2). Repeated press-

es during conversions tog-

gle between Fractional and

Decimal Inches.

/Fraction Bar Key — Used

to enter Fractions. Fractions

can be entered as proper

(1/2, 1/8, 1/16) or improper

(3/2, 9/8). If the denomina-

tor (bottom) is not entered,

the calculator's fractional

accuracy setting is auto-

matically used.

mMeters Key — Enters or

converts to Meters.

Ç 7 Centimeters — Enters or

converts to Centimeters.

(Cont’d)

POCKET REFERENCE GUIDE — 3

Ç 9 Millimeters — Enters or

converts to Millimeters.

Ç 2 Acres — Enters or con-

verts to Acres.

Length, Width and Height Keys

lEnters Length for calculation

of Area or Volume.

WEnters Width and calculates

Area, Square-up and

perimeter.

hEnters Height and calculates

Volume, wall Area and total

room Area. This is a perma-

nent entry; stored value

holds when turned off.

Arc/Circle Keys

AArc — Calculates arc

Length or degree, chord

Length, segment Area, pie

slice Area and segment

rise.

çCircle — Enters diameter

and calculates circle Area

and circumference.

Ç A Radius — Enters or calcu-

lates circle radius.

Ç W Chord — Enters or calcu-

lates the chord Length of a

circle segment.

Ç h Segment Rise — Enters or

calculates the rise of a circle

segment.

(Cont’d)

POCKET REFERENCE GUIDE — 4

Construction Project Keys

rRebar Key — Given stored

or entered rebar inset,

rebar size, rebar on-center

spacing and entered Length

and Width values calculates

the following:

Press Result

1 Total Feet

2 Total Weight

3 Rebar Size

4 Rebar On-center

5 Rebar Inset

6 Stored Length

7 Stored Width

If you already know your total linear

Feet of rebar, you can enter the

Length to calculate the total Weight

based on the Weight per Foot of the

stored rebar size (e.g. 1 0 0 f

r r).

Çr Inset — Stores rebar inset

Default is 3 inches. Rebar

inset is the spacing between

the rebar and the perimeter

of the forms or foundation.

RRebar Size Key — Stores

rebar size. Rebar size can be

entered as a number for rebar

sizes 3-11, 14, and 18(e.g., 5

Rfor number 5 rebar), or

as a decimal or fractional

value not exceeding 6 Inches

in diameter (e.g., 5 / 8

Rfor 5/8 Inch bar size).

Default is number 5 (5/8”).

POCKET REFERENCE GUIDE — 5

Ç RSpacing — Stores rebar

on-center spacing. Default

is 18”.

LLoads Key — Calculates

number of loads for a given

Volume or Length, Width,

and Height (Depth) values

and stored load size.

T L Load Size — Stores load

size. Load size must be

entered as a cubic value

(e.g., 8 y y y

T L). The default

size is 8 cubic Yards.

Ç 5 Bags — Calculates number

of concrete bags for a given

Volume and stored bag size.

T 5 Bag Size — Stores bag

size (Volume per bag of

concrete). Bag size must

be entered as a cubic value

(e.g., • 6 7 f f

f T 5). Default is

0.666667 cubic Feet per

bag, based on a standard

80 pound bag.

BBlocks/Bricks —

Calculates the number of

concrete blocks required to

fill a given Area. This key

can also be used for calcu-

lating the number of “face”

or “paver” bricks by storing

a brick size (see Block

Size).

POCKET REFERENCE GUIDE — 6

T B Block Size — Stores the

block size. Block size must

be entered as a linear value

or a square value. The

default is 128 square Inches

block Area and 16 Inches

block Length.

Note: For bricks, you may also enter a brick size

using T B. For example, when building

with standard “face” bricks, store a brick size of

21 square Inches (e.g., 2 1 i i T

B) or store 32 square Inches (e.g., 3 2 i

i T B)for “paver” bricks. This is based

on Modular U.S. brick size of 3-5/8 Inches x 2-

1/4 Inches x 7-5/8 Inches, including 3/8 Inch

mortar = 4 Inches x 2-5/8 Inches x 8 Inches.

ßSquare-Up Key —

Calculates the “Square-Up”

(diagonal) Length given

entered Length and Width

values.

dDrop Key — Calculates

total drop (or fall) over an

entered Length given,

entered percentage drop,

Inch per Foot drop, or

degrees of drop. Continued

presses will act as a “con-

stant add,” for displaying

successive drops.

Ç 8 Board Feet — Enters or

converts cubic values to

board Feet.

Ç ç Column/Cone — Calculates

the Volume and surface Area

of a column and/or cone.

POCKET REFERENCE GUIDE — 7

FFooting — Finds quantity

of concrete, based on

entered wall Length and

stored footing Area.

T F Footing Area — Stores

footing Area. Footing Area

must be entered as a

square value (e.g., 2 6 4

i i T F).The

default footing is 264

square Inches.

Ç l Polygon — Calculates full

angle, bi-sect angle, side

Length, perimeter and Area

based on entered radius

and number of sides.

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