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Girder Centreline Marker

1 page · 2 crops · ×4 · other

⚠ No class in the bridge ontology fits this itemAdd a class

Girder centreline is a drafting reference axis; ontology has no member centreline class.

How the sheets named it

Girder centre line (axis marker)Girder centreline axisC OF GIRDERC/L OF GIRDER

Notes on the sheets that carry it

  • p2IN MILLIMETERS AND LEVELS ARE IN METERS UNLESS ... (note block at bottom of crop is cut off and only partially legible)

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

Page 2

crop

p02_r01

page 2 · precast_psc_girder_p02_r01
Original
p02_r01
{
  "view": "Cross Section",
  "objects": [
    {
      "name": "Solid support section with 1000 mm top flange tapering to an 800 mm-wide solid section · Precast prestressed concrete (PSC) · ×1 · Section at girder support",
      "tag": "",
      "shape": "Solid rectangular block with top flange haunch (no web taper)",
      "material": "Precast prestressed concrete (PSC)",
      "count": 1,
      "note": "Section at girder support; web is full 800 mm wide over full depth"
    },
    {
      "name": "Precast prestressed concrete girder (mid-span section)",
      "tag": "",
      "shape": "I-girder with tapered fillets, top flange 1000 wide, web 300, bottom flange 800",
      "material": "Precast prestressed concrete (PSC)",
      "count": 1,
      "note": "Section at mid-span showing reduced web thickness"
    },
    {
      "name": "Girder centre line (axis marker)",
      "tag": "C OF GIRDER",
      "shape": "chain-dotted vertical line",
      "material": "",
      "count": 2,
      "note": "One on each section"
    }
  ],
  "measurements": [
    {
      "label": "Top flange thickness (edge)",
      "value": "150",
      "unit": "",
      "appliesTo": "SURPORT SECTION"
    },
    {
      "label": "Top flange width",
      "value": "1000",
      "unit": "",
      "appliesTo": "SURPORT SECTION"
    },
    {
      "label": "Top flange haunch/taper depth",
      "value": "29",
      "unit": "",
      "appliesTo": "SURPORT SECTION"
    },
    {
      "label": "Overall girder depth",
      "value": "2650",
      "unit": "",
      "appliesTo": "SURPORT SECTION"
    },
    {
      "label": "Bottom width",
      "value": "800",
      "unit": "",
      "appliesTo": "SURPORT SECTION"
    },
    {
      "label": "Top flange thickness (edge)",
      "value": "150",
      "unit": "",
      "appliesTo": "MID SECTION"
    },
    {
      "label": "Top flange width",
      "value": "1000",
      "unit": "",
      "appliesTo": "MID SECTION"
    },
    {
      "label": "Top taper/fillet height",
      "value": "100",
      "unit": "",
      "appliesTo": "MID SECTION"
    },
    {
      "label": "Overall girder depth",
      "value": "2650",
      "unit": "",
      "appliesTo": "MID SECTION"
    },
    {
      "label": "Dimension from top taper level down to lower fillet start",
      "value": "1950",
      "unit": "",
      "appliesTo": "MID SECTION"
    },
    {
      "label": "Web thickness",
      "value": "300",
      "unit": "",
      "appliesTo": "MID SECTION"
    },
    {
      "label": "Lower fillet/taper height",
      "value": "200",
      "unit": "",
      "appliesTo": "MID SECTION"
    },
    {
      "label": "Bottom flange thickness",
      "value": "250",
      "unit": "",
      "appliesTo": "MID SECTION"
    },
    {
      "label": "Bottom flange width",
      "value": "800",
      "unit": "",
      "appliesTo": "MID SECTION"
    },
    {
      "label": "Scale",
      "value": "1:50",
      "unit": "",
      "appliesTo": "SURPORT SECTION"
    },
    {
      "label": "Scale",
      "value": "1:50",
      "unit": "",
      "appliesTo": "MID SECTION"
    }
  ],
  "notes": [
    "IN MILLIMETERS AND LEVELS ARE IN METERS UNLESS ... (note block at bottom of crop is cut off and only partially legible)"
  ],
  "labels": [
    "C OF GIRDER",
    "SURPORT SECTION",
    "(SCALE 1:50)",
    "MID SECTION",
    "CROSS SECTION OF PRECAST PSC GIRDER"
  ],
  "description": "This crop shows two cross sections of a precast prestressed concrete girder — the support (end block) section and the mid-span section — both drawn to 1:50 with the girder centre line marked. Both sections are 2650 mm deep with a 1000 mm wide top flange and 800 mm wide bottom; the mid-span section is an I-shape with a 300 mm web, 200 mm lower fillet and 250 mm thick bottom flange, while the support section is solid 800 mm wide throughout. No reinforcement or prestressing tendon layout is shown in this crop; a general note block at the bottom edge is cut off and only partially readable, and despite the automated 'Substructure' label this is superstructure girder geometry."
}

p02_r01Cross Section

  • Girder centre line (axis marker)C OF GIRDER×2chain-dotted vertical lineOne on each section

150 Top flange thickness (edge)1000 Top flange width29 Top flange haunch/taper depth2650 Overall girder depth800 Bottom width150 Top flange thickness (edge)1000 Top flange width100 Top taper/fillet height+8 more

crop

p02_r03

page 2 · precast_psc_girder_p02_r03
Original
p02_r03
{
  "view": "Cross Section",
  "objects": [
    {
      "name": "Precast PSC girder (section at support)",
      "tag": "",
      "shape": "Rectangular blade section with top flange (solid end block)",
      "material": "Precast prestressed concrete",
      "count": 1,
      "note": "Left view titled 'SURPORT SECTION' (as printed); web is solid full depth, no bottom flange flare shown; centreline of girder indicated"
    },
    {
      "name": "Precast PSC girder (section at midspan)",
      "tag": "",
      "shape": "I-section with tapered top and bottom flange fillets",
      "material": "Precast prestressed concrete",
      "count": 1,
      "note": "Right view titled 'MID SECTION'; 300 wide web with 1000 wide top flange and 800 wide bottom flange"
    },
    {
      "name": "Girder centreline axis",
      "tag": "C/L OF GIRDER",
      "shape": "chain-dotted vertical line",
      "material": "",
      "count": 2,
      "note": "One per section view"
    }
  ],
  "measurements": [
    {
      "label": "Top flange thickness",
      "value": "150",
      "unit": "",
      "appliesTo": "Support section"
    },
    {
      "label": "Top flange width",
      "value": "1000",
      "unit": "",
      "appliesTo": "Support section"
    },
    {
      "label": "Top flange haunch/fillet depth",
      "value": "29",
      "unit": "",
      "appliesTo": "Support section"
    },
    {
      "label": "Overall girder depth",
      "value": "2650",
      "unit": "",
      "appliesTo": "Support section"
    },
    {
      "label": "Bottom width",
      "value": "800",
      "unit": "",
      "appliesTo": "Support section"
    },
    {
      "label": "Scale",
      "value": "1:50",
      "unit": "",
      "appliesTo": "SURPORT SECTION"
    },
    {
      "label": "Top flange thickness",
      "value": "150",
      "unit": "",
      "appliesTo": "Mid section"
    },
    {
      "label": "Top flange width",
      "value": "1000",
      "unit": "",
      "appliesTo": "Mid section"
    },
    {
      "label": "Top flange taper/fillet depth",
      "value": "100",
      "unit": "",
      "appliesTo": "Mid section"
    },
    {
      "label": "Overall girder depth",
      "value": "2650",
      "unit": "",
      "appliesTo": "Mid section"
    },
    {
      "label": "Depth from underside of top flange fillet to top of bottom flange flare",
      "value": "1950",
      "unit": "",
      "appliesTo": "Mid section"
    },
    {
      "label": "Bottom flange taper (fillet) height",
      "value": "200",
      "unit": "",
      "appliesTo": "Mid section"
    },
    {
      "label": "Web thickness",
      "value": "300",
      "unit": "",
      "appliesTo": "Mid section"
    },
    {
      "label": "Bottom flange thickness",
      "value": "250",
      "unit": "",
      "appliesTo": "Mid section"
    },
    {
      "label": "Bottom flange width",
      "value": "800",
      "unit": "",
      "appliesTo": "Mid section"
    },
    {
      "label": "Scale",
      "value": "1:50",
      "unit": "",
      "appliesTo": "MID SECTION"
    }
  ],
  "notes": [],
  "labels": [
    "C/L OF GIRDER",
    "SURPORT SECTION",
    "(SCALE 1:50)",
    "MID SECTION",
    "CROSS SECTION OF PRECAST PSC GIRDER"
  ],
  "description": "This crop shows two cross sections of a precast prestressed concrete girder — one taken at the support (solid end-block section) and one at midspan (I-section) — both drawn at scale 1:50 with the girder centreline marked. Dimensions given are overall depth 2650, top flange 1000 wide by 150 thick, web 300 thick at midspan, and bottom flange 800 wide by 250 thick with a 200 taper, while the support section is a solid 800 wide web full depth with a 29 top flange fillet. No reinforcement, prestressing strand layout, or material grade notes appear in this crop; despite the automated 'Substructure' label the content is superstructure girder geometry."
}

p02_r03Cross Section

  • Girder centreline axisC/L OF GIRDER×2chain-dotted vertical lineOne per section view

150 Top flange thickness1000 Top flange width29 Top flange haunch/fillet depth2650 Overall girder depth800 Bottom width1:50 Scale150 Top flange thickness1000 Top flange width+8 more