What angle of elbow would be obtained using only the 1st, 2nd and last gores of a 4pc 90 degree elbow?

Prepare for the HVAC Sheet Metal Block 1 Exam. Utilize multiple choice questions and flashcards with detailed explanations to strengthen your skills and knowledge in HVAC Sheet Metal. Ensure success in your exam journey!

The use of the first, second, and last gores of a four-piece 90-degree elbow indicates a specific fabrication technique in HVAC sheet metal work. In a standard four-piece elbow, each gore serves as a section that contributes to the overall bend of the elbow.

By selecting only the first, second, and last gores, you are effectively omitting the third gore, which plays a crucial role in defining the angle of the elbow. The first and second gores will adjust the initial curve, and utilizing the last gore provides the necessary closure to form a more gradual angle, rather than a complete right angle.

In this case, using the first and second gores adds to a cumulative angle of approximately 60 degrees. Thus, the elbow formed from this combination would not achieve a typical 90-degree bend, but rather a 60-degree angle. This highlights the relationship between the number and selection of gores in determining the angle of the fabricated elbow, showcasing an important principle in the design of HVAC ductwork.

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