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Basic Math
From constructionknoweldge.net
27
Other
Beginner
01/08/2016

Additional Other Flashcards

 


 

Cards

Term
In terms of adding dimensions what is the most powerful technique one can use in the field to avoid errors?
Definition
Change inches to decimal feet.
Term
In what situations can you benefit from converting inches to decimal feet?
Definition
  • Checking a string of dimensions to verify they correclty add
  • Comparing elevations between a site drawing and an architectural drawing (different units)
  • Laying out accessible ramps and accessibily routes
Term
One does 1/8 inches equal to in decimal feet?
Definition
0.01 feet
Term
What does 1/4 inches equal to in decimal feet?
Definition
0.02 feet
Term
What does 3/8 inches equal to in decimal feet?
Definition
0.03 feet
Term
What does 1/2 inches equal to in decimal feet?
Definition
0.04 feet
Term
What does 5/8 inches equal to in decimal feet?
Definition
0.05 feet
Term
What does 3/4 inches equal to in decimal feet?
Definition
0.06 feet
Term
What does 7/8 inches equal to in decimal feet?
Definition
0.07 feet
Term
What does 1 inches equal to in decimal feet?
Definition
0.08 feet
Term
In order to have an accessible route what is the maximum slope allowed by code?
Definition
maximum of 5%
Term

Accessible Route or Ramp?


Say the building finished floor elevation is 401' - 6 1/4" and the grade at the parking space is 400.14'. The sidewalk between the parking space and the front door has a distance of 30'.  Would this be considered an accessible route or a ramp with handrails?

Definition

First step is to know that in order for it to be an accessible route the slope must be less than 5%. 

 

Bldg Elevation in Feet

1/4" = 0.02'

6" = 0.08*6 = 0.48'

401' + 0.50' = 401.50'

 

Get the Height Difference

401.50' - 400.14' = 1.36'

 

Get The Slope

1.36' / 30' x 100 = 4.53 %

 

4.53% < 5% therefore it is an accessible route.

 

Term
[image]
Definition

Convert Inches to Decimal Feet

6" = 6x0.08 = 0.48'

 

Find Volume

60'x30'x0.48'=864 CF

 

Convert To CY

864 CF / 27 = 32 CY

 

Area of Semi-Circle

A=1/2 pir^2

A=0.5 x 3.14*15^2

A=353.43 SF

 

Find Volume

V=353.43 SF * 0.48 FT

V=169.64 CF

 

Convert

169.64 CF / 27 = 6.28 CY

 

ADD

32 CY + 6.28 CY = 38.28 CY

 

But buy (5% more for waste) total 40 CY

Term
What is the conversation factor for CF to CY?
Definition
Divide CF by 27 to get CY.
Term
What is the conversation from SF to Acre?
Definition
Divide SF by 43,560
Term
What is the weight of concrete?
Definition
150 lbs per CF
Term
What is the weight of steel?
Definition
450 lbs per CF
Term
How to convert CY of Concrete to Tons?
Definition

Multiply by 27

Mulitply by 150

Divide by 2000

Term
How many pounds in one ton?
Definition
2000 lbs
Term
What does BTU stand for?
Definition
British Thermal Unit
Term
How many acres in 150,000 SF?
Definition
3.44 Acre
Term
How many tons in 1 CY concrete?
Definition
2.03 tons
Term
What is the one technique to use in order to solve math problems?
Definition
  1. Always write the problem down
  2. Always list the units (even if it seems simple to you)
  3. Always go through and cancel the units to make sure the answer you get is in the correct units
Term
What is the basic word for solving trigonometry problems?
Definition
SOH CAH TOA
Term
What is the sine of the angle?
Definition
SOH
Sine (theta) = opposite / hypotenuse
Term
What is the consine of the angle?
Definition

CAH

 

Cosine (theta) = Adjacent / Hypotenuse

Term
What is the tangent of the Angle?
Definition

TOA

 

Tangent (theta) = Opposite / Adjacent

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