This app allows you to create table driven solutions using the methods and formulas covered in SMACNA’s HVAC Duct Construction Standard (Metal and Flexible). The app will provide SMACNA compliant options for rectangular duct with dimensions up to 120-inches for applications to ten-inch water gage (positive or negative).
Joint lengths are limited to 4, 5, and 6 feet. Transverse connections are limited to T1 (flat drive), T5 (flat slip), T10, 11, and 12 (standing slips), and T25 a or b (TDC/TDF). Where appropriate the app will also provide options for intermediate reinforcement. Reinforcement spacing options is are 6, 5, 4, 3, 2 1/2, and 2 feet.
In most cases the app will provide options for internal and external reinforcements. Internal options are limited to EMT conduit tie rods. External reinforcements are limited to angles. Enough information is provided so users can choose other options from SMACNA's standard. The app does not provide every possible solution found in SMACNA's standard nor provide every detail.
Output is a written description of the duct as well as a graphic representation. Users have the option to can view or email the report.
https://apps.apple.com/us/app/smacna-hvac-duct-construction/id716751022
https://apps.smacna.org/dcsapp/index.html