Calculated Industries 4225 Manuale utente
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– 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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