What is the 4th ordinate cutback measurement for a 3'' diameter type 3 dummy leg on a 6'' elbow?

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Multiple Choice

What is the 4th ordinate cutback measurement for a 3'' diameter type 3 dummy leg on a 6'' elbow?

Ordinate cutbacks are the preset distances you trim back from the centerline at successive vertical positions on a dummy leg mounted to an elbow so the leg fits properly. The 4th ordinate is one of the later offsets farther from the centerline, and its value depends on the elbow size, the dummy leg diameter, and the ordinal position. For a 6-inch elbow with a 3-inch diameter dummy leg of type 3, the standard fabrication table specifies the 4th ordinate cutback as 10 3/16 inches. This exact combination matches the chart’s entry for the 4th offset, which is why it’s the correct measurement. The other numbers correspond to different ordinates or configurations, not this particular case. In practice you’d confirm by looking up the exact combination in the official NCCER table or fit-up chart.

Ordinate cutbacks are the preset distances you trim back from the centerline at successive vertical positions on a dummy leg mounted to an elbow so the leg fits properly. The 4th ordinate is one of the later offsets farther from the centerline, and its value depends on the elbow size, the dummy leg diameter, and the ordinal position.

For a 6-inch elbow with a 3-inch diameter dummy leg of type 3, the standard fabrication table specifies the 4th ordinate cutback as 10 3/16 inches. This exact combination matches the chart’s entry for the 4th offset, which is why it’s the correct measurement. The other numbers correspond to different ordinates or configurations, not this particular case. In practice you’d confirm by looking up the exact combination in the official NCCER table or fit-up chart.

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