Dummy Support Calculator

Dummy Support Calculator is a pipe fabrication calculator for dummy supports, saddle cuts, fishmouth cuts, elbow trunnions, and elbow miter layout work. The app helps calculate the cut line where a dummy pipe meets a run pipe or elbow surface, then provides practical dimensions, development data, and marking information for shop-floor fabrication. Supported calculations: - Straight Dummy: fishmouth saddle cut for a dummy pipe welded to a horizontal run pipe - Elbow Trunnion: dummy support layout on an elbow surface - Elbow Miter: cutting data for standard 45° and 90° elbows Key features: - NPS pipe size selection - Automatic pipe outside diameter reference - Center-height based dummy length calculation - 2D section view with dimensions - Saddle depth and dummy circumference calculation - Development graph for marking - Coordinate table for layout points - Marking PDF export and sharing This app is designed for pipe fitters, fabricators, welders, piping engineers, and field workers who need quick layout support for pipe dummy supports and saddle-cut marking. Common use cases: - Pipe dummy support fabrication - Saddle cut layout - Fishmouth cut calculation - Pipe support marking - Elbow trunnion layout - Elbow miter cutting - Workshop and field measurement support Core calculations are processed on the device. The app is intended as a practical fabrication aid and should be used with proper engineering review, site standards, and field verification.