This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: Describe how rectangular sheet metal ducts are joined. What will be an ideal ... (Read 136 times)

Alygatorr01285

  • Hero Member
  • *****
  • Posts: 564
on: Jul 26, 2018
Describe how rectangular sheet metal ducts are joined.
 
  What will be an ideal response?

Question 2

Describe how to install a dovetail takeoff fitting on a ductboard trunk.
 
  What will be an ideal response?


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

elyse44

  • Sr. Member
  • ****
  • Posts: 319
Reply #1 on: Jul 26, 2018
Answer to Question 1

Rectangular ducts are joined by S-locks and drives cleats. S locks are used on the larger duct dimension, usually the top and bottom. The shorter dimensions are joined by drive cleats. The duct edges are turned back, the drive cleat slips over the edges and pulls the duct together. These are driven down with a mallet; thus the name, drive cleat. These joints sealed with UL 181-A mastic or UL 181-A tape and mastic.

Answer to Question 2

Mark the hole on the trunk
Cut an insulating ring out of fiberduct, slide over the takeoff and tape in place. Coat the flange portion of the takeoff with mastic.
Insert the dovetail tabs into the hole. Reach in and bend over the dovetails.


Alygatorr01285

  • Member
  • Posts: 564
Reply 2 on: Jul 26, 2018
:D TYSM

atrochim

  • Member
  • Posts: 331
Reply 3 on: Yesterday
Excellent

« previous next »
 

Did you know?

In 1885, the Lloyd Manufacturing Company of Albany, New York, promoted and sold "Cocaine Toothache Drops" at 15 cents per bottle! In 1914, the Harrison Narcotic Act brought the sale and distribution of this drug under federal control.

Did you know?

Asthma cases in Americans are about 75% higher today than they were in 1980.

Did you know?

To prove that stomach ulcers were caused by bacteria and not by stress, a researcher consumed an entire laboratory beaker full of bacterial culture. After this, he did indeed develop stomach ulcers, and won the Nobel Prize for his discovery.

Did you know?

The FDA recognizes 118 routes of administration.

Did you know?

Blastomycosis is often misdiagnosed, resulting in tragic outcomes. It is caused by a fungus living in moist soil, in wooded areas of the United States and Canada. If inhaled, the fungus can cause mild breathing problems that may worsen and cause serious illness and even death.

The logistic growth model does not describe all populations. The logistic growth model does not describe all populations.
Rill and Sheet Erosion Rill and Sheet Erosion
A sample flow sheet. A sample flow sheet.
West and East Antarctic Ice Sheet West and East Antarctic Ice Sheet
Under ideal conditions, a single cell of the bacterium E. coli would divide every 20 minutes to ... Under ideal conditions, a single cell of the bacterium E. coli would divide every 20 minutes to ...
Video: How to make cDNA Animation

For a complete list of videos, visit our video library