# What gauge should ductwork be?

## What gauge should ductwork be?

Sheet metal gauges used in ductwork

Comments Sheet Metal Gauge Sheet Thickness (inches)
Welded Ductwork 15 0.0700
SMACNA1) Ductwork 16 0.0625
17 0.0560
18 0.0500

## What is gauge thickness measurement?

A sheet metal gauge (sometimes spelled “gage”) indicates the standard thickness of sheet metal for a specific material. As the gauge number increases, the material thickness decreases. Thus, a 10 gauge steel sheet which has a thickness of 0.1345 inches will weigh 41.82*0.1345 = 5.625 pounds per square foot.

How do you calculate duct weight?

Create two weight parameters. One for the rectangular Ducts and one for the Round ducts. Formula rectangular Duct: ((2 * (Height + Width)) * Length * Thickness) * Density metal. Formula round Duct: (Length * pi() * Diameter * Thickness) * Density metal.

What are the gauges for a ducting sheet?

As per SMACNA the gauges of ducting sheet varies and depends upon the width of the duct and type of application of a particular project. Here are the few gauge system as per SMACNA standards. Example: low and medium velocity duct system. 26 gauge is use for the duct size below 300 mm (12″) and thickness 0.5 mm.

### How to calculate the size of a duct?

FIELD DUCT SIZING CHART Rectangular sheet metal duct = .07″ on most metal duct calculators Duct Size Duct Height – Net inside dimension in inches ROUND DUCT SIZE ESTIMATE RECTANGULAR DUCT SIZE ESTIMATE 14″ 5″ 6″ 7″ 8″ 16″ 18″ 20″ Design Airflow 50 75 110 9″ 10″ 12″ 1300 1700 160 225 300 480 700 1000 Duct Size 5″ 6″ 7″ 8″ 18″ 20″ 9″ 10″ 12″

### What’s the difference between 18 and 24 gauge ducts?

18 gauge for duct size above 3000 mm (120″) thickness 1.2 mm For high velocity duct system gauge ranges from 26 to 16 but thickness is different. Note: commonly for G.I sheet 22 and 24 gauge are used in actual practice. Hope those answers to your question.

What are the SMACNA standards for ducting sheets?

Here are the few gauge system as per SMACNA standards. Example: low and medium velocity duct system. 26 gauge is use for the duct size below 300 mm (12″) and thickness 0.5 mm. 24 gauge is use for the duct size up to 750 mm (30″) and thickness is 0.6 mm. 22 gauge for duct size up to 1200 mm (48″) thickness 0.8 mm.