Calculated Industries 4225-C User Manual

Pocket Reference Guide

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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 – 9 Keys used for entering
and • numbers.

O Off Key — Turns all power

off, clearing all non-perma­nent registers.

o On/Clear Key — Turns on

power. Pressing once clears
the display. Pressing twice
clears all temporary values.

Ç Convert Key — Used with

the dimensional keys to
convert between dimen­sions or with other keys to
access special functions.

T Store Key — Used for stor-

ing values.

® Recall Key — Recalls

stored values.

GETTING STARTED

POCKET REFERENCE GUIDE — 2

Unit Keys

y Yards Key — Enters or

converts to Yards.

f Feet Key — Enters or con-

verts to Feet as whole or
decimal numbers. Also
used with the i and /
keys for entering Feet-Inch
values (e.g., 6 f 9
i1 /2). Repeated
presses during conversions
toggle between Fractional
and Decimal Feet.

i Inch Key — Enters or con-

verts to Inches. Entry can
be whole or decimal num­bers. Also used with the /
key for entering fractional
Inch values (e.g., 9 i
1 / 2). Repeated press­es during conversions tog­gle 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 denomina­tor (bottom) is not entered,
the calculator's fractional
accuracy setting is auto­matically used.

m Meters 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

l Enters Length for calculation

of Area or Volume.

W Enters Width and calculates

Area, Square-up and
perimeter.

h Enters Height and calculates

Volume, wall Area and total
room Area. This is a perma­nent entry; stored value
holds when turned off.

Arc/Circle Keys

A Arc — Calculates arc

Length or degree, chord
Length, segment Area, pie
slice Area and segment
rise.

ç Circle — 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

r Rebar 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.

R Rebar Size Key — Stores

rebar size. Rebar size can be
entered as a number for rebar
sizes 3-11, 14, and 18(e.g., 5

R for number 5 rebar), or

as a decimal or fractional
value not exceeding 6 Inches
in diameter (e.g., 5 / 8

R for 5/8 Inch bar size).

Default is number 5 (5/8”).

POCKET REFERENCE GUIDE — 5

Ç R Spacing — Stores rebar

on-center spacing. Default
is 18”.

L Loads 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.

B Blocks/Bricks —

Calculates the number of
concrete blocks required to
fill a given Area. This key
can also be used for calcu­lating 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 2­1/4 Inches x 7-5/8 Inches, including 3/8 Inch
mortar = 4 Inches x 2-5/8 Inches x 8 Inches.

ß Square-Up Key —

Calculates the “Square-Up”
(diagonal) Length given
entered Length and Width
values.

d Drop 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 “con­stant 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

F Footing — 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.

POCKET REFERENCE GUIDE — 8

Stair Layout Key

s Given Height and/or Length

and stored variables,
calculates or displays:

Press

Result

1 Riser Height (R-HT)
2 Number of Risers

(RSRS)

3 Riser Overage/

Underage (R+/-)
4 Tread Width (T-WD)
5 Number of Treads

(TRDS)

6 Tread Overage/

Underage (T+/-)
7 Stairwell Opening

(OPEN)

8 Stringer Length

(STRG)

9 Angle of Incline (INCL)
10 Stored or Calculated

Run (RUN)
11 Stored or Calculated

Rise (RISE)
12 Stored Desired

Riser Height (R-HT)
13 Stored Desired

Tread Width (T-WD)
14 Stored Headroom

(HDRM)

15 Stored Floor

Thickness (FLOR)

(Cont’d)

POCKET REFERENCE GUIDE — 9

Ç s Riser Limited — Calculates

riser Height and other stair
values if you’re limited by
local code. The calculated
riser Height will never exceed
the stored desired riser
Height.

STAIR DEFAULT VALUES

• 7-1/2” Desired Riser Height

• 10” Desired Tread Width

• 10” Floor Thickness

• 6’8” Headroom

Customizable Stair Settings

T 7 Stores Desired Riser

Height.

T 9 Stores Desired Tread

Width.

T 8 Stores Floor Thickness.
Ç T TSets Headroom.

TT

Miscellaneous Functions

a Backspace Key.
® = Paperless Tape.
Ç T Preference Settings.
Ç ÷ (1/x) Reciprocal — Finds

the reciprocal of a number
(e.g., 8 Ç ÷ 0.125).

Ç x Clear All — Returns all

stored values to the default
settings. (Does not affect
Preference Settings.)

(Cont’d)

POCKET REFERENCE GUIDE — 10

Ç – (+/–) Toggle.
Ç + Pi (π) 3.141593.
Ç • Converts between D:M:S

and decimal degrees.

Ç % x

2

— Squares the value in

the display.

Ç a ( ) Square Root.
Ç / Exponential Notation (x10

y

).

Ç 0 Total Cost (based on entry

of per unit cost).

T 0 Weight per Volume –

Stores a new Weight per
Volume value.

Note: After entering a value and pressing T
0, continue pressing the 0 digit key until you’ve
reached the desired Weight per Volume format.
To recall your setting, press ® 0.

Ç 6 Tons — Enters or converts

to Tons.

Ç 4 Pounds — Enters or con-

verts to Pounds.

Ç 3 Metric Tons — Enters or

converts to Metric Tons.

Ç 1 Kilograms — Enters or

converts to Kilograms.

μ Memory +.
Ç μ (M–) Memory Minus.
T 1 (M1) Storage Register.
T 2 (M2) Storage Register.
T 3 (M3) Storage Register.
Ç ® Clear M+.
® ® Recall and Clear M+.
® μ, 1, Recall M+, M1, M2 or M3.

2 or 3

POCKET REFERENCE GUIDE — 11

PREFERENCE SETTINGS

Press Ç, then T, then keep pressing
T to toggle through the main settings.

Press the + key to advance within sub­setting. Use the – key to back up. Press
any key to exit Preferences.

PRESS
Ç AND: SETTING--FUNCTION

First press Fractional Resolution:
of T: --1/16

+ --1/32
+ --1/64
+ --1/2
+ --1/4
+ --1/8
+ --1/16 (repeats options)

Second press Area Displays:
of T: --Std.

+ --0.

SQ FEET

+ --0. SQ YD
+ --0. SQ M
+ --Std. (repeats options)

Third press Volume Displays:
of T: --Std.

+ --0.

CU YD

+ --0. CU FEET
+ --0. CU M
+ --Std. (repeats options)

(Cont’d)

POCKET REFERENCE GUIDE — 12

PRESS: SETTING--FUNCTION

Fourth press Headroom Height Setting:
of T: --6 FEET 8 INCH

+*--6 FEET 9 INCH
–*--6 FEET 8 INCH

*Press + to increment or – to decrement by
one inch.

Fifth press Exponential Mode:
of T: --OFF

+ --On
+ --OFF (repeats options)

Sixth press Meter Linear Displays:
of T: --0.000 M

+ --FLOAt M (floating point)
+ --0.000 M (repeats options)

Seventh press Decimal Degree Displays:
of T: --0.00º

+ --FLOAt (floating point)
+ --0.00º (repeats options)

Eighth press Fractional Mode:
of T: --Std.

+ --COnSt
+ --Std. (repeats options)

Note: Press o at anytime to exit the Preference
Settings.

(Cont’d)

POCKET REFERENCE GUIDE — 13

ENTERING DIMENSIONS

Linear Dimensions

When entering Feet-Inch values, enter
dimensions from largest to smallest — Feet
before Inches, Inches before Fractions.
Enter Fractions by entering the numerator
(top number), pressing / (Fraction Bar
key) and then the denominator (bottom
number).

Note: If a denominator is not entered, the frac­tional setting value is used.

Examples of how linear dimensions are
entered (press o after each entry):

DIMENSION KEYSTROKES

5 Yards 5 y
5 Feet 1-1/2 Inch 5 f 1 i 1 / 2

17.5 Meters 1 7 • 5 m

Square and Cubic Dimensions

Examples of how Square and Cubic
dimensions are entered (press o after
each entry):

DIMENSION KEYSTROKES

5 Cubic Yards 5 y y y
130 Square Feet 1 3 0 f f
33 Square Meters 3 3 m m