Research — Auto Demo · Precomputed (draft, unvalidated)

Structure loading walk, auto

No controls here: six short stories play on their own. Wind builds on a pole until its demand reaches the capacity entered, a stronger class carries a longer span, the insulator string swings toward the structure under three clearance winds, a line angle over-swings it, a crossarm reaches its vertical-span limit, and a taller pole switches method. Pause, or pick a story and step, to stop on any frame.

Story

composite of three bulletin examplesdraft, unvalidated harnessillustrative geometrystring length illustrative

Four readings of one loading case · each with the exporter's comparison

End view · across the line, wind from the right

Groundline moments · the stack, the demand and the capacity

String swing · angle from vertical, toward the structure

Spans · the maximum the pole carries, the limits on the vertical span

wind on polewind on wiresunbalanced verticalP-delta (pole deflection)the exporter flags "exceeds"the exporter flags "within"

All nine checks at this step · the controlling row is highlighted

Controlling row (a display choice, not a result): the first row the exporter flags as exceeding, otherwise the row closest to its limit. 'Comparison' is the exporter's flag (demo-logic); the functions compute values and never judge. A panel that is off in a story reads 'not evaluated', never zero.

How the checks read it

Bulletin check · the worked-example values the exporter asserted against the Python results

Every check · the first reading, the change, the last step

Columns are step labels, so a story whose last step is not a fix says so. Where the first, second and last steps coincide, a column reads 'same step'. 'What moved' compares the exporter's exceeds / within flags between steps; it is not a harness result.

Precomputed results:every verdict, required value and margin on this page was computed by the real Python harness at export time and is played back from a data file. The page runs no harness logic and holds no standards tables, and it never interpolates between exported values. Not a live API call. Precomputed by the real utm-agent-harness functions (commit e61dd9d) at export time and played back from a data file. The harness is a DRAFT with no human subject-matter-expert sign-off; nothing here is a compliance determination. The functions COMPUTE values (a moment, a span, a swing angle) and never judge. Where a computed number sits next to a capacity or a limit, the words "exceeds" and "within" are the exporter's own comparison against the value entered in that step (provenance demo-logic), not a harness verdict. The scene is a COMPOSITE of three separate RUS Bulletin 1724E-200 worked examples (the TS-1 55 ft pole, the TH-10 161 kV insulator string and the TS pole-top crossarm); it is not one real structure, the geometry is illustrative, and the harness has no insulator string length so the string is drawn at an illustrative length. Pole classes other than 1 change only the Table F-2 groundline capacity; diameters stay at the TS-1 values. The bulletin gives the wire wind load only at 4 psf; at other pressures the exporter scales it linearly (demo-logic). Swing limits (16.4, 53.2 and 77.7 deg) and conductor tensions are bulletin inputs, not harness outputs. Domain maturity, quoted from the domain page: schema draft, unvalidated; no structural or transmission-line PE has reviewed it; insulator swing, pole capacity, crossarm span and guying are checked against the bulletin's worked examples.Real functions this maps to:max_horizontal_span_ground_line_method, max_horizontal_span_point_of_maximum_stress_method, groundline_moment_capacity_ft_k, groundline_moment_due_to_wind_on_pole, groundline_moment_due_to_wind_on_wires_per_span, deflection_estimate_coefficient, insulator_swing_angle_deg, required_vertical_span_ft, max_vertical_span_ft.Not modeled: guyed poles, H-frames, the iterative deflection-magnifier re-check (the assumed 1.15 is used as given), pole classes with their own taper, any conductor or insulator string other than the three bulletin examples, and whether a given design is acceptable. The pole is drawn with heights to scale and horizontal distances exaggerated; the bending of the pole, the sag of the wire and the length of the string are pictures, not results.See also:Structure loading walk, interactive with free play · Pole groundline moment, auto sweep