Seams, Joints and Fastening
Locks, seams, riveting, soldering, brazing and spot welding, followed through a first-year apprentice at a Cleveland sheet metal contractor: lap, grooved and double seams, Pittsburgh and snap locks, rectangular and round duct joints, flat lock, standing and batten seams, rivets, soft soldering of copper, brazing and hot work, spot and stud welding, duct sealing and leakage classes, and a capstone lined duct section and soldered copper test panel.
SMW-130 12 lessons · 3 h 39 min ▶ Video lessons coming soon
Offered by HSM University · Sheet Metal
This is the American version of this course. See the Canadian version.
What you'll learn
- Explain the four jobs of a sheet metal joint, classify joints into mechanical, fastened and metallurgical families, and find the rules that govern a joint in codes, standards and specifications
- Lay out, form and close lap, grooved, double and corner seams by hand, and work out and test their allowances in any gauge and metal
- Form, assemble, close, seal and inspect Pittsburgh locks and snap locks, and choose between them for a given duct
- Make and install rectangular transverse joints, including S and drive slips, standing slips and roll-formed flanges, and explain how joints are rated by pressure class, width and gauge
- Join round and spiral duct with crimped and beaded slip joints, couplings, gasketed fittings, flanges and draw bands, oriented, fastened and sealed correctly
- Lay out and form flat lock, standing and batten seams with cleats and clips that allow thermal movement, and choose the seam for the roof slope
- Select, size, lay out, set and remove solid and blind rivets, and check a riveted joint for shear, bearing and tearing
- Clean, flux, pre-tin and sweat soldered seams in copper, galvanized steel and stainless steel with the right solder, and control the hazards of the work
- Braze copper and dissimilar metals, recognize where brazing or welding must replace solder, and carry out hot work under a permit with a fire watch
- Set up, test and log resistance spot welds and capacitor discharge insulation pins, and recognize joints that call for arc welding
- Seal duct joints to the required seal class with listed sealants, tapes and gaskets, and calculate allowable leakage from a leakage class
- Plan, build, inspect, test and record a lined duct section and a soldered copper test panel from a joint schedule
Course content
12 lessons · 3 h 39 min total · final exam
- 1 Why joints matter: strength, tightness and codes 20 min · quiz
- 2 Lap, grooved and corner seams 19 min · quiz
- 3 The Pittsburgh lock and the snap lock 18 min · quiz
- 4 Transverse duct joints: slips, drives and flanges 19 min · quiz
- 5 Round and spiral duct joints 18 min · quiz
- 6 Architectural seams: flat lock, standing and batten seams 17 min · quiz
- 7 Rivets and riveting 17 min · quiz
- 8 Soft soldering 19 min · quiz
- 9 Brazing and hot work in sheet metal 18 min · quiz
- 10 Resistance spot welding and stud welding 19 min · quiz
- 11 Sealing duct joints 17 min · quiz
- 12 Capstone: a trunk duct section and a copper flat-lock panel 18 min · quiz
- E Final exam 20 questions
Requirements
Recommended background. You can start any course at any time.
Description
Locks, seams, riveting, soldering, brazing and spot welding, followed through a first-year apprentice at a Cleveland sheet metal contractor: lap, grooved and double seams, Pittsburgh and snap locks, rectangular and round duct joints, flat lock, standing and batten seams, rivets, soft soldering of copper, brazing and hot work, spot and stud welding, duct sealing and leakage classes, and a capstone lined duct section and soldered copper test panel.