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CMP 124 Exam 1 Questions with All Correct Answers

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CMP 124 Exam 1 Questions with All Correct Answers What kind of lumber is used in wood foundations? - Answer-Treated lumber What kind of nails used in wood foundations? - Answer-Only Stainless steel because it won’t erode Advantages of Wood Foundations - Answer-- No Construction delays due...

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  • September 1, 2024
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CMP 124 Exam 1 Questions with All
Correct Answers
What kind of lumber is used in wood foundations? - Answer-Treated lumber

What kind of nails used in wood foundations? - Answer-Only Stainless steel because it
won’t erode

Advantages of Wood Foundations - Answer-- No Construction delays due to mud or
concrete trucks

- cost savings (less $ than concrete)

-Energy savings (only if you finish basement insulate)

Site Prep - how much and what is the base? - Answer-6 - 12" of crushed rock

Pour what before backfilling (refill an excavated hole with the material dug out of it) your
site? - Answer-Pour the basement floor and 1st floor

How to keep basement of site dry from frost? - Answer-Straw

Wood has to be what to touch concrete? - Answer-Treated! Concrete can transfer
moisture

Anchor Straps - Answer-A strap that secures the sill to the foundation

Hurricane straps - Answer-Pockets, easy to nail, and nail proof

-used to help make structure (specifically wooden structures) more resistant high winds

House Wraps - Answer-1. protect from moisture
2. no air molecules pass thru
3. lets house breathe out moisture

stop-->air passage
vents-->vapor

What does Moisture (Vapor Control) cause? - Answer--Vapor is only damaging when
condenses or freezes

VAPOR = HIDDEN MOISTURE

, Causes:
-Decay
-Dry rot
-blistering paint
-rust metal
-crackling/spawling concrete

Do we still need moisture? - Answer-YES! Helps with comfort, and avoid furniture from
cracking when it is too dry

relative humidity - Answer-The amount of water vapor in the air at any given time is
usually less than that required to saturate the air. Expressed as a percentage.

100% Rh = fully saturated

What does RH affect? - Answer-The dimensional stability of materials

dew point - Answer-the temperature at which the water vapor in the air becomes
saturated

Why do DP and RH matter? 3 things - Answer-1) Dimensional stability
2) Builder materials
3) millwork and furniture

In our climate where does the vapor barrier go and where does the house wrap go? -
Answer-Vapor barrier --> warm side
House wrap --> cold side

Grain pattern - Answer--Shows the wood's character
-Shows the structural properties

Types of Wood - Answer-Spring Wood and Summer Wood

Spring Wood - Answer--Early
-Larger than Summer Wood
-Less Dense

Summer Wood - Answer--Later
-Denser than Spring Wood
-Darker Ring
-Stronger/Stiffer

2 Species of Wood - Answer-Soft Wood and Hard Wood

Soft Wood - Answer--Conifer/Needle
-75% of total lumber

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