LIGHT COMMERCIAL INSTALLATION PROCEDURES Flashcards
What is the most noteworthy difference between residential and light commercial blueprints
Grid lines
Where does the intersection of grid lines usually occur
Centreline of columns
Which item are callouts most commonly used for on an hvac drawing
Grilles and diffusers
What are the three items of information on a grille callout
Type, connection, CFM
Who should be consulted when proposing changes to an hvac design
Design engineer
Return air is to be ducted to one or several ceiling grilles when_______?
When there are combustible materials in the ceiling space
Plastic plumbing pipe is considered to be a combustible
T OR F
True
What is the purpose of external aluminum cladding on outdoor ductwork
To reduce leakage
Increase longevity
Minimize wear and tear
4 most important things you need to tell a crane operator when ordering a crane to hoist hvac EQUIPTMENT on a roof
Weight
Access
Height of the building
Distance from the edge of the building to the center of the curb
Why is it important to install balancing dampers in all specified locations so that they are accessible and easy to reach
To create air balance as per the engineers specification
What are the different commercial specification categories called?
Divisions
Define “Blanket Specifications”?
Same specifications may be used for all of the buildings in a certain geographical area where an engineer has the design contract
Who has the final say on any proposed changes on a jobsite
Engineer
List three pieces of information that could be found on an equipment specification sheet
Inlet and outlet dimensions, electrical and gas connections, weight
What are equipment specifications for custom items called?
Shop drawings
List two organizations that provide standardized specifications to the HVAC trade
SMACNA, ASHRAE
Are safety concerns not related directly to your trade worth reporting? Why/Why not?
Yes because it’s the responsibility of all people on worksites to identify safety violations and report them
List two advantages of scheduling
Help avoid clutter while working, help the job stay on track for start and completion dates
List four considerations when hoisting equipment
Weight,
Structural reinforcing ,
clearance for the crane,
height of building,
distance from the edge of building to the center of the curb
In which category of drawings would we usually find HVAC components?
Shop Drawings
What component of a blueprint helps us locate all major elements?
Grid Lines
What is a callout?
Number or letter in a box
What are three pieces of information usually found in a grill callout?
Connection, type, CFM
Define the term “Building Envelope”
Outside shell of a building
