Drawing → BOQ
← Mindmapwhat the drawings said

Top Of High Rail

1 page · 1 crop · ×1 · other

Matched toCrossing Alignmentbridge.alignment_system.crossing_alignmentcheckon “Rail”

2 not established
The class asks forValueHowFrom
Skew AngleTHETAwants degnot establishedThe construction clearance diagram identifies the TOP OF HIGH RAIL reference line but gives no skew angle.not found
ChainageCHwants mnot establishedThe construction clearance diagram gives no chainage for the TOP OF HIGH RAIL.not found

Worked out by openai/gpt-5.6-terra from the readings below, which are the source. A derived value shows its arithmetic — check it against the drawing before it is priced.

How the sheets named it

TOP OF HIGH RAIL

Every crop it was read in — the drawing beside what the model took off it

Page 1

crop

p01_r05 construction clearance diagram

page 1 · gdot_drawing_for_one_item_1d2aef44145e4a0fb4e1079a43f94de1_p01_r05_construction_clearance_diagram
Original
p01_r05 construction clearance diagram
{
  "view": "Detail",
  "objects": [
    {
      "name": "construction clearance envelope",
      "tag": "",
      "shape": "rectangular",
      "material": "",
      "count": 1,
      "note": "Clearance diagram outline."
    },
    {
      "name": "track centerline",
      "tag": "℄ TRACK",
      "shape": "line",
      "material": "",
      "count": 1,
      "note": "Vertical dashed centerline shown."
    },
    {
      "name": "top of high rail",
      "tag": "TOP OF HIGH RAIL",
      "shape": "horizontal line",
      "material": "",
      "count": 1,
      "note": "Bottom reference line of clearance diagram."
    }
  ],
  "measurements": [
    {
      "label": "overall vertical clearance",
      "value": "22'-0\"",
      "unit": "",
      "appliesTo": "construction clearance envelope"
    },
    {
      "label": "horizontal clearance from track centerline to left side",
      "value": "13'-0\"",
      "unit": "",
      "appliesTo": "construction clearance envelope"
    },
    {
      "label": "horizontal clearance from track centerline to right side",
      "value": "13'-0\"",
      "unit": "",
      "appliesTo": "construction clearance envelope"
    }
  ],
  "notes": [],
  "labels": [
    "CONSTRUCTION CLEARANCE DIAGRAM",
    "NO SCALE"
  ],
  "description": "This crop shows a construction clearance diagram, not to scale. A rectangular clearance envelope is centered on the track centerline, with the bottom line referenced to the top of high rail."
}

p01_r05 construction clearance diagramDetail

  • top of high railTOP OF HIGH RAIL×1horizontal lineBottom reference line of clearance diagram.

22'-0" overall vertical clearance13'-0" horizontal clearance from track centerline to left side13'-0" horizontal clearance from track centerline to right side