Construction

Question 1

What is the board feet formula?

Answer 1

thickness x width x length x # of pieces / 12(L-ft) or 144(L-in)

T x W x L x #P / 12 or 144 op

Question 2

How to calculate for board measure?

Answer 2

Bf x 1.1(2”thick or more)

Bf x 1.2(1”thick or less)

Question 3

What is the nail formula?

Answer 3

Framing - P= (D/6) x (bm/100)

Sheathing- P= (D/4) x (bm/100)

Question 4

What is the formula for marking long walls and short walls?

Answer 4

1. Work space
2. Fixtures
3. Studs

LW: 1. -1”

   2. -1/2” 
   3. ON center

SW: 1. -ws x 2

   2. -ws
   3. -ws

Question 5

Formula for marking stairs?

Answer 5

Measure floor height from ground.

1. Floor height / 7.5 =
2. Round up or down to nearest whole # = #treads
3. floor height / # of treads = riser height

Question 6

Formula for rafter length, total rafter length marking?

Answer 6

Gather critical dimensions

RL:
Run = Span / 2
Rise= run x pitch / 12 
Find hypotenuse:
A2 + b2 = C2 (sq root c2 for rafter length in ft) 
Remainder x 12 = inches 
Remainder in x 16 = fraction

TRL: 
Run + projection
Rise = total run x pitch / 12
Find hypotenuse:
A2 + B2 = C2 (sq root c2 for rafter length in ft)
Remainder x 12 for inches 
Remainder x 16 for fraction

Question 7

Calculate for sheathing

Answer 7

Floor: (Length x Width)/ 32 = # Sheets ^ whole # x2 = total sheets 3/4” plywood

Walls: (Linear ft. X height)/ 32= #S ^
#s x 1.2 = total sheets 1/2” plywood

Question 8

What are the 4 types of lumber?

Answer 8

Hard wood
Soft wood
Bamboo
Palm

Question 9

What are the 3 lumber grades?

Answer 9

Yard lumber- we use yard lumber
Structural material
Factory and shop lumber

Question 10

What is select lumber?

Answer 10

Good appearance identified by grades a-d

Question 11

What is common lumber?

Answer 11

Suitable for general construction and utility purposes. Identified by grades 1 common - 5 common

Question 12

Lumber dimensions

Answer 12

Framing:
2” x 6” = 1 1/2” x 5 1/2”
2” x 4” = 1 1/2” x 3 1/2”
1” x 4” = 3/4” x 3 1/2”

Sheathing:
4’ x 8’ thickness between 1/8” to 1”

Question 13

What are the 4 primary types of nails?

What are their sizes?

Answer 13

Common wire
Finishing
Scaffolding
Roofing

2 penny(d) thru 60 penny(d)

Question 14

What size nails do you use for:

Sheathing?

Framing?

What are the 3 most common sizes SOC use?

Answer 14

Sheathing: 2d thru 8d

Framing 10d thru 60d

Most commonly used in soc:
6d gussets
8d sheathing
16d framing

Question 15

What are the 3 rules of thumb for nails?

Answer 15

• Use proper nail size
• must penetrate 3/4 into second board
• Drive nails at slight angle towards each other
• Use good nail pattern

Question 16

How do you make strong connections?

Answer 16

Joints or splices

Question 17

What is a joint?

What are the 2 types of joints?

Answer 17

Joint is the connection of 2 or more pieces of wood that meet at an angle.

Butt
Lap

Question 18

What are the 3 types of butt joints?

Answer 18

Straight butt
Oblique butt
Miter butt

Question 19

What are the 5 types of lap joints?

Answer 19

Cross lap
Middle lap
Miter half lap
Plain lap
Half lap

Question 20

What is a splice?

What are the 5 types of splices?

Answer 20

A splice is the connection of two or more members that continue in a straight line

Butt splice
Halved 
Squere
Plain
Complimentary

Question 21

What are splices designed to resist stresses from?

Answer 21

Tension
Compression
Bending

Question 22

What are the 3 life ranges for design life? How long are they?

Answer 22

Permanent 25 yrs or more
Semi-permanent 5 - 25 yrs
Temporary 0-5 yrs

Question 23

What are the characteristics of a temporary building?

Answer 23

Simple in design

Durable and useable

Use of local materials

Unskilled labor can be used in construction

Withstand expected climatic weather

Lower safety factors are allowed

Question 24

What are the 3 types of framing?

Answer 24

Platform
Balloon
Braced