{"schemaVersion":1,"scope":"Original erection-note datums for Floors1\u201347 and main-roof steel; partial/local floor elevations are separate.","groundDrawingDatumFt":311.3333333333333,"floors":[{"floor":1,"datumElevationFt":309.25,"yFt":-2.0833333333333144,"steelOffsetBelowSlabIn":8,"slabThicknessFt":null,"steelTopDatumFt":308.5833333333333,"steelTopYFt":-2.75,"basis":"original-erection-general-steel-and-slab-notes","sourceIds":["frankel-E1"],"sourceCrop":"analysis/wtc7-blueprint-reconstruction/floor-datum-crops/E1-notes-native.png","note":"E1 states top of slab309ft3in and general steel308ft7in. Their8in difference is a steel-to-slab offset, not a uniform slab thickness; Floor1 thickness varies by region and remains unassigned here. The retained model origin311ft4in is a registration datum, not the first-floor level."},{"floor":2,"datumElevationFt":320.375,"yFt":9.041666666666686,"steelOffsetBelowSlabIn":6,"slabThicknessFt":0.5,"steelTopDatumFt":319.875,"steelTopYFt":8.541666666666686,"basis":"original-erection-general-steel-and-slab-notes","sourceIds":["frankel-E2"],"sourceCrop":"analysis/wtc7-blueprint-reconstruction/floor-datum-crops/E2-notes-native.png","note":"General new-steel level plus original slab thickness. Partial floors, existing substation and local core elevations can differ; those member-local datums remain separate."},{"floor":3,"datumElevationFt":334.5,"yFt":23.166666666666686,"steelOffsetBelowSlabIn":6,"slabThicknessFt":0.5,"steelTopDatumFt":334,"steelTopYFt":22.666666666666686,"basis":"original-erection-general-steel-and-slab-notes","sourceIds":["frankel-E3"],"sourceCrop":"analysis/wtc7-blueprint-reconstruction/floor-datum-crops/E3-notes-native.png","note":"General new-steel level plus original slab thickness. Partial floors, existing substation and local core elevations can differ; those member-local datums remain separate."},{"floor":4,"datumElevationFt":348.5,"yFt":37.166666666666686,"steelOffsetBelowSlabIn":6,"slabThicknessFt":0.5,"steelTopDatumFt":348,"steelTopYFt":36.666666666666686,"basis":"original-erection-general-steel-and-slab-notes","sourceIds":["frankel-E4"],"sourceCrop":"analysis/wtc7-blueprint-reconstruction/floor-datum-crops/E4-notes-native.png","note":"General new-steel level plus original slab thickness. Partial floors, existing substation and local core elevations can differ; those member-local datums remain separate."},{"floor":5,"datumElevationFt":362.75,"yFt":51.416666666666686,"steelOffsetBelowSlabIn":14,"slabThicknessFt":1.1666666666666667,"steelTopDatumFt":361.5833333333333,"steelTopYFt":50.25,"basis":"original-erection-general-steel-and-slab-notes","sourceIds":["frankel-E5"],"sourceCrop":"analysis/wtc7-blueprint-reconstruction/floor-datum-crops/E5-notes-native.png","note":"General new-steel level plus original slab thickness. Partial floors, existing substation and local core elevations can differ; those member-local datums remain separate."},{"floor":6,"datumElevationFt":375.75,"yFt":64.41666666666669,"steelOffsetBelowSlabIn":6,"slabThicknessFt":0.5,"steelTopDatumFt":375.25,"steelTopYFt":63.916666666666686,"basis":"original-erection-general-steel-and-slab-notes","sourceIds":["frankel-E6"],"sourceCrop":"analysis/wtc7-blueprint-reconstruction/floor-datum-crops/E6-notes-native.png","note":"General new-steel level plus original slab thickness. Partial floors, existing substation and local core elevations can differ; those member-local datums remain separate."},{"floor":7,"datumElevationFt":389.0,"yFt":77.66666666666669,"steelOffsetBelowSlabIn":8,"slabThicknessFt":0.6666666666666666,"steelTopDatumFt":388.3333333333333,"steelTopYFt":77.0,"basis":"original-erection-general-steel-and-slab-notes","sourceIds":["frankel-E7"],"sourceCrop":"analysis/wtc7-blueprint-reconstruction/floor-datum-crops/E7-notes-native.png","note":"General new-steel level plus original slab thickness. Partial floors, existing substation and local core elevations can differ; those member-local datums remain separate."},{"floor":8,"datumElevationFt":401.75,"yFt":90.41666666666669,"steelOffsetBelowSlabIn":5.5,"steelTopDatumFt":401.2916666666667,"steelTopYFt":89.95833333333337,"basis":"original-erection-sheet-finished-slab-and-general-steel-offset","sourceIds":["frankel-E8_9"],"sourceCrop":"analysis/wtc7-blueprint-reconstruction/floor-datum-crops/E8_9.png","note":"General floor elevation and top-of-steel note; local member exceptions are not all transcribed."},{"floor":9,"datumElevationFt":414.5,"yFt":103.16666666666669,"steelOffsetBelowSlabIn":5.5,"steelTopDatumFt":414.0416666666667,"steelTopYFt":102.70833333333337,"basis":"original-erection-sheet-finished-slab-and-general-steel-offset","sourceIds":["frankel-E8_9"],"sourceCrop":"analysis/wtc7-blueprint-reconstruction/floor-datum-crops/E8_9.png","note":"General floor elevation and top-of-steel note; local member exceptions are not all transcribed."},{"floor":10,"datumElevationFt":427.25,"yFt":115.91666666666669,"steelOffsetBelowSlabIn":5.5,"steelTopDatumFt":426.7916666666667,"steelTopYFt":115.45833333333337,"basis":"original-erection-sheet-finished-slab-and-general-steel-offset","sourceIds":["frankel-E10_11"],"sourceCrop":"analysis/wtc7-blueprint-reconstruction/floor-datum-crops/E10_11.png","note":"General floor elevation and top-of-steel note; local member exceptions are not all transcribed."},{"floor":11,"datumElevationFt":440.0,"yFt":128.66666666666669,"steelOffsetBelowSlabIn":5.5,"steelTopDatumFt":439.5416666666667,"steelTopYFt":128.20833333333337,"basis":"original-erection-sheet-finished-slab-and-general-steel-offset","sourceIds":["frankel-E10_11"],"sourceCrop":"analysis/wtc7-blueprint-reconstruction/floor-datum-crops/E10_11.png","note":"General floor elevation and top-of-steel note; local member exceptions are not all transcribed."},{"floor":12,"datumElevationFt":452.75,"yFt":141.41666666666669,"steelOffsetBelowSlabIn":5.5,"steelTopDatumFt":452.2916666666667,"steelTopYFt":140.95833333333337,"basis":"original-erection-sheet-finished-slab-and-general-steel-offset","sourceIds":["frankel-E12_13"],"sourceCrop":"analysis/wtc7-blueprint-reconstruction/floor-datum-crops/E12_13.png","note":"General floor elevation and top-of-steel note; local member exceptions are not all transcribed."},{"floor":13,"datumElevationFt":465.5,"yFt":154.16666666666669,"steelOffsetBelowSlabIn":5.5,"steelTopDatumFt":465.0416666666667,"steelTopYFt":153.70833333333337,"basis":"original-erection-sheet-finished-slab-and-general-steel-offset","sourceIds":["frankel-E12_13"],"sourceCrop":"analysis/wtc7-blueprint-reconstruction/floor-datum-crops/E12_13.png","note":"General floor elevation and top-of-steel note; local member exceptions are not all transcribed."},{"floor":14,"datumElevationFt":478.25,"yFt":166.91666666666669,"steelOffsetBelowSlabIn":5.5,"steelTopDatumFt":477.7916666666667,"steelTopYFt":166.45833333333337,"basis":"original-erection-sheet-finished-slab-and-general-steel-offset","sourceIds":["frankel-E14_15"],"sourceCrop":"analysis/wtc7-blueprint-reconstruction/floor-datum-crops/E14_15.png","note":"General floor elevation and top-of-steel note; local member exceptions are not all transcribed."},{"floor":15,"datumElevationFt":491.0,"yFt":179.66666666666669,"steelOffsetBelowSlabIn":5.5,"steelTopDatumFt":490.5416666666667,"steelTopYFt":179.20833333333337,"basis":"original-erection-sheet-finished-slab-and-general-steel-offset","sourceIds":["frankel-E14_15"],"sourceCrop":"analysis/wtc7-blueprint-reconstruction/floor-datum-crops/E14_15.png","note":"General floor elevation and top-of-steel note; local member exceptions are not all transcribed."},{"floor":16,"datumElevationFt":503.75,"yFt":192.41666666666669,"steelOffsetBelowSlabIn":5.5,"steelTopDatumFt":503.2916666666667,"steelTopYFt":191.95833333333337,"basis":"original-erection-sheet-finished-slab-and-general-steel-offset","sourceIds":["frankel-E16_17"],"sourceCrop":"analysis/wtc7-blueprint-reconstruction/floor-datum-crops/E16_17.png","note":"General floor elevation and top-of-steel note; local member exceptions are not all transcribed."},{"floor":17,"datumElevationFt":516.5,"yFt":205.16666666666669,"steelOffsetBelowSlabIn":5.5,"steelTopDatumFt":516.0416666666666,"steelTopYFt":204.70833333333331,"basis":"original-erection-sheet-finished-slab-and-general-steel-offset","sourceIds":["frankel-E16_17"],"sourceCrop":"analysis/wtc7-blueprint-reconstruction/floor-datum-crops/E16_17.png","note":"General floor elevation and top-of-steel note; local member exceptions are not all transcribed."},{"floor":18,"datumElevationFt":529.25,"yFt":217.91666666666669,"steelOffsetBelowSlabIn":5.5,"steelTopDatumFt":528.7916666666666,"steelTopYFt":217.45833333333331,"basis":"original-erection-sheet-finished-slab-and-general-steel-offset","sourceIds":["frankel-E18_E19"],"sourceCrop":"analysis/wtc7-blueprint-reconstruction/floor-datum-crops/E18_E19.png","note":"General floor elevation and top-of-steel note; local member exceptions are not all transcribed."},{"floor":19,"datumElevationFt":542.0,"yFt":230.66666666666669,"steelOffsetBelowSlabIn":5.5,"steelTopDatumFt":541.5416666666666,"steelTopYFt":230.20833333333331,"basis":"original-erection-sheet-finished-slab-and-general-steel-offset","sourceIds":["frankel-E18_E19"],"sourceCrop":"analysis/wtc7-blueprint-reconstruction/floor-datum-crops/E18_E19.png","note":"General floor elevation and top-of-steel note; local member exceptions are not all transcribed."},{"floor":20,"datumElevationFt":554.75,"yFt":243.41666666666669,"steelOffsetBelowSlabIn":5.5,"steelTopDatumFt":554.2916666666666,"steelTopYFt":242.95833333333331,"basis":"original-erection-sheet-finished-slab-and-general-steel-offset","sourceIds":["frankel-E20"],"sourceCrop":"analysis/wtc7-blueprint-reconstruction/floor-datum-crops/E20.png","note":"General floor elevation and top-of-steel note; local member exceptions are not all transcribed."},{"floor":21,"datumElevationFt":567.5,"yFt":256.1666666666667,"steelOffsetBelowSlabIn":5.5,"steelTopDatumFt":567.0416666666666,"steelTopYFt":255.70833333333331,"basis":"original-erection-sheet-finished-slab-and-general-steel-offset","sourceIds":["frankel-E21"],"sourceCrop":"analysis/wtc7-blueprint-reconstruction/floor-datum-crops/E21.png","note":"General floor elevation and top-of-steel note; local member exceptions are not all transcribed."},{"floor":22,"datumElevationFt":582.25,"yFt":270.9166666666667,"steelOffsetBelowSlabIn":5.5,"steelTopDatumFt":581.7916666666666,"steelTopYFt":270.4583333333333,"basis":"original-erection-sheet-finished-slab-and-general-steel-offset","sourceIds":["frankel-E22_23"],"sourceCrop":"analysis/wtc7-blueprint-reconstruction/floor-datum-crops/E22_23.png","note":"General floor elevation and top-of-steel note; local member exceptions are not all transcribed."},{"floor":23,"datumElevationFt":597.0,"yFt":285.6666666666667,"steelOffsetBelowSlabIn":5.5,"steelTopDatumFt":596.5416666666666,"steelTopYFt":285.2083333333333,"basis":"original-erection-sheet-finished-slab-and-general-steel-offset","sourceIds":["frankel-E22_23"],"sourceCrop":"analysis/wtc7-blueprint-reconstruction/floor-datum-crops/E22_23.png","note":"General floor elevation and top-of-steel note; local member exceptions are not all transcribed."},{"floor":24,"datumElevationFt":611.75,"yFt":300.4166666666667,"steelOffsetBelowSlabIn":5.5,"steelTopDatumFt":611.2916666666666,"steelTopYFt":299.9583333333333,"basis":"original-erection-sheet-finished-slab-and-general-steel-offset","sourceIds":["frankel-E24"],"sourceCrop":"analysis/wtc7-blueprint-reconstruction/floor-datum-crops/E24.png","note":"General floor elevation and top-of-steel note; local member exceptions are not all transcribed."},{"floor":25,"datumElevationFt":624.5,"yFt":313.1666666666667,"steelOffsetBelowSlabIn":5.5,"steelTopDatumFt":624.0416666666666,"steelTopYFt":312.7083333333333,"basis":"original-erection-sheet-finished-slab-and-general-steel-offset","sourceIds":["frankel-E25"],"sourceCrop":"analysis/wtc7-blueprint-reconstruction/floor-datum-crops/E25.png","note":"General floor elevation and top-of-steel note; local member exceptions are not all transcribed."},{"floor":26,"datumElevationFt":637.25,"yFt":325.9166666666667,"steelOffsetBelowSlabIn":5.5,"steelTopDatumFt":636.7916666666666,"steelTopYFt":325.4583333333333,"basis":"original-erection-sheet-finished-slab-and-general-steel-offset","sourceIds":["frankel-E26_27"],"sourceCrop":"analysis/wtc7-blueprint-reconstruction/floor-datum-crops/E26_27.png","note":"General floor elevation and top-of-steel note; local member exceptions are not all transcribed."},{"floor":27,"datumElevationFt":650.0,"yFt":338.6666666666667,"steelOffsetBelowSlabIn":5.5,"steelTopDatumFt":649.5416666666666,"steelTopYFt":338.2083333333333,"basis":"original-erection-sheet-finished-slab-and-general-steel-offset","sourceIds":["frankel-E26_27"],"sourceCrop":"analysis/wtc7-blueprint-reconstruction/floor-datum-crops/E26_27.png","note":"General floor elevation and top-of-steel note; local member exceptions are not all transcribed."},{"floor":28,"datumElevationFt":662.75,"yFt":351.4166666666667,"steelOffsetBelowSlabIn":5.5,"steelTopDatumFt":662.2916666666666,"steelTopYFt":350.9583333333333,"basis":"original-erection-sheet-finished-slab-and-general-steel-offset","sourceIds":["frankel-E28_29"],"sourceCrop":"analysis/wtc7-blueprint-reconstruction/floor-datum-crops/E28_29.png","note":"General floor elevation and top-of-steel note; local member exceptions are not all transcribed."},{"floor":29,"datumElevationFt":675.5,"yFt":364.1666666666667,"steelOffsetBelowSlabIn":5.5,"steelTopDatumFt":675.0416666666666,"steelTopYFt":363.7083333333333,"basis":"original-erection-sheet-finished-slab-and-general-steel-offset","sourceIds":["frankel-E28_29"],"sourceCrop":"analysis/wtc7-blueprint-reconstruction/floor-datum-crops/E28_29.png","note":"General floor elevation and top-of-steel note; local member exceptions are not all transcribed."},{"floor":30,"datumElevationFt":688.25,"yFt":376.9166666666667,"steelOffsetBelowSlabIn":5.5,"steelTopDatumFt":687.7916666666666,"steelTopYFt":376.4583333333333,"basis":"original-erection-sheet-finished-slab-and-general-steel-offset","sourceIds":["frankel-E30_31"],"sourceCrop":"analysis/wtc7-blueprint-reconstruction/floor-datum-crops/E30_31.png","note":"General floor elevation and top-of-steel note; local member exceptions are not all transcribed."},{"floor":31,"datumElevationFt":701.0,"yFt":389.6666666666667,"steelOffsetBelowSlabIn":5.5,"steelTopDatumFt":700.5416666666666,"steelTopYFt":389.2083333333333,"basis":"original-erection-sheet-finished-slab-and-general-steel-offset","sourceIds":["frankel-E30_31"],"sourceCrop":"analysis/wtc7-blueprint-reconstruction/floor-datum-crops/E30_31.png","note":"General floor elevation and top-of-steel note; local member exceptions are not all transcribed."},{"floor":32,"datumElevationFt":713.75,"yFt":402.4166666666667,"steelOffsetBelowSlabIn":5.5,"steelTopDatumFt":713.2916666666666,"steelTopYFt":401.9583333333333,"basis":"original-erection-sheet-finished-slab-and-general-steel-offset","sourceIds":["frankel-E32_33"],"sourceCrop":"analysis/wtc7-blueprint-reconstruction/floor-datum-crops/E32_33.png","note":"General floor elevation and top-of-steel note; local member exceptions are not all transcribed."},{"floor":33,"datumElevationFt":726.5,"yFt":415.1666666666667,"steelOffsetBelowSlabIn":5.5,"steelTopDatumFt":726.0416666666666,"steelTopYFt":414.7083333333333,"basis":"original-erection-sheet-finished-slab-and-general-steel-offset","sourceIds":["frankel-E32_33"],"sourceCrop":"analysis/wtc7-blueprint-reconstruction/floor-datum-crops/E32_33.png","note":"General floor elevation and top-of-steel note; local member exceptions are not all transcribed."},{"floor":34,"datumElevationFt":739.25,"yFt":427.9166666666667,"steelOffsetBelowSlabIn":5.5,"steelTopDatumFt":738.7916666666666,"steelTopYFt":427.4583333333333,"basis":"original-erection-sheet-finished-slab-and-general-steel-offset","sourceIds":["frankel-E34_35"],"sourceCrop":"analysis/wtc7-blueprint-reconstruction/floor-datum-crops/E34_35.png","note":"General floor elevation and top-of-steel note; local member exceptions are not all transcribed."},{"floor":35,"datumElevationFt":752.0,"yFt":440.6666666666667,"steelOffsetBelowSlabIn":5.5,"steelTopDatumFt":751.5416666666666,"steelTopYFt":440.2083333333333,"basis":"original-erection-sheet-finished-slab-and-general-steel-offset","sourceIds":["frankel-E34_35"],"sourceCrop":"analysis/wtc7-blueprint-reconstruction/floor-datum-crops/E34_35.png","note":"General floor elevation and top-of-steel note; local member exceptions are not all transcribed."},{"floor":36,"datumElevationFt":764.75,"yFt":453.4166666666667,"steelOffsetBelowSlabIn":5.5,"steelTopDatumFt":764.2916666666666,"steelTopYFt":452.9583333333333,"basis":"original-erection-sheet-finished-slab-and-general-steel-offset","sourceIds":["frankel-E36_37"],"sourceCrop":"analysis/wtc7-blueprint-reconstruction/floor-datum-crops/E36_37.png","note":"General floor elevation and top-of-steel note; local member exceptions are not all transcribed."},{"floor":37,"datumElevationFt":777.5,"yFt":466.1666666666667,"steelOffsetBelowSlabIn":5.5,"steelTopDatumFt":777.0416666666666,"steelTopYFt":465.7083333333333,"basis":"original-erection-sheet-finished-slab-and-general-steel-offset","sourceIds":["frankel-E36_37"],"sourceCrop":"analysis/wtc7-blueprint-reconstruction/floor-datum-crops/E36_37.png","note":"General floor elevation and top-of-steel note; local member exceptions are not all transcribed."},{"floor":38,"datumElevationFt":790.25,"yFt":478.9166666666667,"steelOffsetBelowSlabIn":5.5,"steelTopDatumFt":789.7916666666666,"steelTopYFt":478.4583333333333,"basis":"original-erection-sheet-finished-slab-and-general-steel-offset","sourceIds":["frankel-E38_39"],"sourceCrop":"analysis/wtc7-blueprint-reconstruction/floor-datum-crops/E38_39.png","note":"General floor elevation and top-of-steel note; local member exceptions are not all transcribed."},{"floor":39,"datumElevationFt":803.0,"yFt":491.6666666666667,"steelOffsetBelowSlabIn":5.5,"steelTopDatumFt":802.5416666666666,"steelTopYFt":491.2083333333333,"basis":"original-erection-sheet-finished-slab-and-general-steel-offset","sourceIds":["frankel-E38_39"],"sourceCrop":"analysis/wtc7-blueprint-reconstruction/floor-datum-crops/E38_39.png","note":"General floor elevation and top-of-steel note; local member exceptions are not all transcribed."},{"floor":40,"datumElevationFt":815.75,"yFt":504.4166666666667,"steelOffsetBelowSlabIn":5.5,"steelTopDatumFt":815.2916666666666,"steelTopYFt":503.9583333333333,"basis":"original-erection-sheet-finished-slab-and-general-steel-offset","sourceIds":["frankel-E40_41"],"sourceCrop":"analysis/wtc7-blueprint-reconstruction/floor-datum-crops/E40_41.png","note":"General floor elevation and top-of-steel note; local member exceptions are not all transcribed."},{"floor":41,"datumElevationFt":828.5,"yFt":517.1666666666667,"steelOffsetBelowSlabIn":5.5,"steelTopDatumFt":828.0416666666666,"steelTopYFt":516.7083333333333,"basis":"original-erection-sheet-finished-slab-and-general-steel-offset","sourceIds":["frankel-E40_41"],"sourceCrop":"analysis/wtc7-blueprint-reconstruction/floor-datum-crops/E40_41.png","note":"General floor elevation and top-of-steel note; local member exceptions are not all transcribed."},{"floor":42,"datumElevationFt":841.25,"yFt":529.9166666666667,"steelOffsetBelowSlabIn":5.5,"steelTopDatumFt":840.7916666666666,"steelTopYFt":529.4583333333333,"basis":"original-erection-sheet-finished-slab-and-general-steel-offset","sourceIds":["frankel-E42_43"],"sourceCrop":"analysis/wtc7-blueprint-reconstruction/floor-datum-crops/E42_43.png","note":"General floor elevation and top-of-steel note; local member exceptions are not all transcribed."},{"floor":43,"datumElevationFt":854.0,"yFt":542.6666666666667,"steelOffsetBelowSlabIn":5.5,"steelTopDatumFt":853.5416666666666,"steelTopYFt":542.2083333333333,"basis":"original-erection-sheet-finished-slab-and-general-steel-offset","sourceIds":["frankel-E42_43"],"sourceCrop":"analysis/wtc7-blueprint-reconstruction/floor-datum-crops/E42_43.png","note":"General floor elevation and top-of-steel note; local member exceptions are not all transcribed."},{"floor":44,"datumElevationFt":866.75,"yFt":555.4166666666667,"steelOffsetBelowSlabIn":5.5,"steelTopDatumFt":866.2916666666666,"steelTopYFt":554.9583333333333,"basis":"original-erection-sheet-finished-slab-and-general-steel-offset","sourceIds":["frankel-E44_45"],"sourceCrop":"analysis/wtc7-blueprint-reconstruction/floor-datum-crops/E44_45.png","note":"General floor elevation and top-of-steel note; local member exceptions are not all transcribed."},{"floor":45,"datumElevationFt":879.5,"yFt":568.1666666666667,"steelOffsetBelowSlabIn":5.5,"steelTopDatumFt":879.0416666666666,"steelTopYFt":567.7083333333333,"basis":"original-erection-sheet-finished-slab-and-general-steel-offset","sourceIds":["frankel-E44_45"],"sourceCrop":"analysis/wtc7-blueprint-reconstruction/floor-datum-crops/E44_45.png","note":"General floor elevation and top-of-steel note; local member exceptions are not all transcribed."},{"floor":46,"datumElevationFt":893.75,"yFt":582.4166666666667,"steelOffsetBelowSlabIn":5.5,"steelTopDatumFt":893.2916666666666,"steelTopYFt":581.9583333333333,"basis":"original-erection-sheet-finished-slab-and-general-steel-offset","sourceIds":["frankel-e46"],"sourceCrop":"analysis/wtc7-blueprint-reconstruction/floor-datum-crops/e46.png","note":"Nominal finished slab; local exceptions/camber remain governed by individual drawing callouts."},{"floor":47,"datumElevationFt":906.5,"yFt":595.1666666666667,"steelOffsetBelowSlabIn":5.5,"steelTopDatumFt":906.0416666666666,"steelTopYFt":594.7083333333333,"basis":"original-erection-sheet-finished-slab-and-general-steel-offset","sourceIds":["frankel-e47"],"sourceCrop":"analysis/wtc7-blueprint-reconstruction/floor-datum-crops/e47.png","note":"General floor elevation and top-of-steel note; local member exceptions are not all transcribed."}],"roof":{"steelTopDatumFt":920.625,"steelTopYFt":609.2916666666667,"slabHighDatumFt":921.3333333333334,"slabLowDatumFt":921.0833333333334,"sourceId":"frankel-E48","sourceCrop":"analysis/wtc7-blueprint-reconstruction/special-floor-source-crops/E48-notes.png","note":"Roof structural slab slopes; general steel level is EL920ft7.5in unless a local offset is noted."},"sourceDifferences":[{"floor":46,"sourceId":"cantor-S12","designSteelDatumFt":893.25,"erectionSteelDatumFt":893.2916666666666,"differenceIn":0.5,"note":"S12 design T/ST893ft3in differs by half an inch from E46 nominal finished893ft9in minus5.5in. E46 controls this layer; keep both."}],"localDatums":[{"floor":2,"steelTopDatumFt":322,"sourceId":"frankel-E121","region":"lower core","note":"Core workpoint datum differs from E2 general new-steel level319ft10.5in; do not flatten this local level into the general floor plane."}],"sources":[{"id":"frankel-E1","path":"sources/wtc7/drawings/expanded-releases/12-009/NIST_WTC7_FOIA_12-009/NIST_WTC7_FOIA_12-009_WTC7_E_Sheets/E Sheets/7WTC - E1/E1.tif","use":"General finished slab and top-of-steel notes"},{"id":"frankel-E2","path":"sources/wtc7/drawings/expanded-releases/12-009/NIST_WTC7_FOIA_12-009/NIST_WTC7_FOIA_12-009_WTC7_E_Sheets/E Sheets/7WTC - E1/E2.tif","use":"General finished slab and top-of-steel notes"},{"id":"frankel-E3","path":"sources/wtc7/drawings/expanded-releases/12-009/NIST_WTC7_FOIA_12-009/NIST_WTC7_FOIA_12-009_WTC7_E_Sheets/E Sheets/7WTC - E1/E3.tif","use":"General finished slab and top-of-steel notes"},{"id":"frankel-E4","path":"sources/wtc7/drawings/expanded-releases/12-009/NIST_WTC7_FOIA_12-009/NIST_WTC7_FOIA_12-009_WTC7_E_Sheets/E Sheets/7WTC - E1/E4.tif","use":"General finished slab and top-of-steel notes"},{"id":"frankel-E5","path":"sources/wtc7/drawings/expanded-releases/12-009/NIST_WTC7_FOIA_12-009/NIST_WTC7_FOIA_12-009_WTC7_E_Sheets/E Sheets/7WTC - E1/E5.tif","use":"General finished slab and top-of-steel notes"},{"id":"frankel-E6","path":"sources/wtc7/drawings/expanded-releases/12-009/NIST_WTC7_FOIA_12-009/NIST_WTC7_FOIA_12-009_WTC7_E_Sheets/E Sheets/7WTC - E1/E6.tif","use":"General finished slab and top-of-steel notes"},{"id":"frankel-E7","path":"sources/wtc7/drawings/expanded-releases/12-009/NIST_WTC7_FOIA_12-009/NIST_WTC7_FOIA_12-009_WTC7_E_Sheets/E Sheets/7WTC - E1/E7.tif","use":"General finished slab and top-of-steel notes"},{"id":"frankel-E8_9","path":"sources/wtc7/drawings/expanded-releases/12-009/NIST_WTC7_FOIA_12-009/NIST_WTC7_FOIA_12-009_WTC7_E_Sheets/E Sheets/7WTC - E1/E8_9.tif","use":"General finished slab and top-of-steel notes"},{"id":"frankel-E10_11","path":"sources/wtc7/drawings/expanded-releases/12-009/NIST_WTC7_FOIA_12-009/NIST_WTC7_FOIA_12-009_WTC7_E_Sheets/E Sheets/7WTC - E1/E10_11.tif","use":"General finished slab and top-of-steel notes"},{"id":"frankel-E12_13","path":"sources/wtc7/drawings/expanded-releases/12-009/NIST_WTC7_FOIA_12-009/NIST_WTC7_FOIA_12-009_WTC7_E_Sheets/E Sheets/7WTC - E1/E12_13.tif","use":"General finished slab and top-of-steel notes"},{"id":"frankel-E14_15","path":"sources/wtc7/drawings/expanded-releases/12-009/NIST_WTC7_FOIA_12-009/NIST_WTC7_FOIA_12-009_WTC7_E_Sheets/E Sheets/7WTC - E1/E14_15.tif","use":"General finished slab and top-of-steel notes"},{"id":"frankel-E16_17","path":"sources/wtc7/drawings/expanded-releases/12-009/NIST_WTC7_FOIA_12-009/NIST_WTC7_FOIA_12-009_WTC7_E_Sheets/E Sheets/7WTC - E1/E16_17.tif","use":"General finished slab and top-of-steel notes"},{"id":"frankel-E18_E19","path":"sources/wtc7/drawings/expanded-releases/12-009/NIST_WTC7_FOIA_12-009/NIST_WTC7_FOIA_12-009_WTC7_E_Sheets/E Sheets/7WTC - E1/E18_E19.tif","use":"General finished slab and top-of-steel notes"},{"id":"frankel-E20","path":"sources/wtc7/drawings/expanded-releases/12-009/NIST_WTC7_FOIA_12-009/NIST_WTC7_FOIA_12-009_WTC7_E_Sheets/E Sheets/7WTC - E1/E20.tif","use":"General finished slab and top-of-steel notes"},{"id":"frankel-E21","path":"sources/wtc7/drawings/expanded-releases/12-009/NIST_WTC7_FOIA_12-009/NIST_WTC7_FOIA_12-009_WTC7_E_Sheets/E Sheets/7WTC - E1/E21.tif","use":"General finished slab and top-of-steel notes"},{"id":"frankel-E22_23","path":"sources/wtc7/drawings/expanded-releases/12-009/NIST_WTC7_FOIA_12-009/NIST_WTC7_FOIA_12-009_WTC7_E_Sheets/E Sheets/7WTC - E1/E22_23.tif","use":"General finished slab and top-of-steel notes"},{"id":"frankel-E24","path":"sources/wtc7/drawings/expanded-releases/12-009/NIST_WTC7_FOIA_12-009/NIST_WTC7_FOIA_12-009_WTC7_E_Sheets/E Sheets/7WTC - E1/E24.tif","use":"General finished slab and top-of-steel notes"},{"id":"frankel-E25","path":"sources/wtc7/drawings/expanded-releases/12-009/NIST_WTC7_FOIA_12-009/NIST_WTC7_FOIA_12-009_WTC7_E_Sheets/E Sheets/7WTC - E1/E25.tif","use":"General finished slab and top-of-steel notes"},{"id":"frankel-E26_27","path":"sources/wtc7/drawings/expanded-releases/12-009/NIST_WTC7_FOIA_12-009/NIST_WTC7_FOIA_12-009_WTC7_E_Sheets/E Sheets/7WTC - E1/E26_27.tif","use":"General finished slab and top-of-steel notes"},{"id":"frankel-E28_29","path":"sources/wtc7/drawings/expanded-releases/12-009/NIST_WTC7_FOIA_12-009/NIST_WTC7_FOIA_12-009_WTC7_E_Sheets/E Sheets/7WTC - E1/E28_29.tif","use":"General finished slab and top-of-steel notes"},{"id":"frankel-E30_31","path":"sources/wtc7/drawings/expanded-releases/12-009/NIST_WTC7_FOIA_12-009/NIST_WTC7_FOIA_12-009_WTC7_E_Sheets/E Sheets/7WTC - E1/E30_31.tif","use":"General finished slab and top-of-steel notes"},{"id":"frankel-E32_33","path":"sources/wtc7/drawings/expanded-releases/12-009/NIST_WTC7_FOIA_12-009/NIST_WTC7_FOIA_12-009_WTC7_E_Sheets/E Sheets/7WTC - E1/E32_33.tif","use":"General finished slab and top-of-steel notes"},{"id":"frankel-E34_35","path":"sources/wtc7/drawings/expanded-releases/12-009/NIST_WTC7_FOIA_12-009/NIST_WTC7_FOIA_12-009_WTC7_E_Sheets/E Sheets/7WTC - E1/E34_35.tif","use":"General finished slab and top-of-steel notes"},{"id":"frankel-E36_37","path":"sources/wtc7/drawings/expanded-releases/12-009/NIST_WTC7_FOIA_12-009/NIST_WTC7_FOIA_12-009_WTC7_E_Sheets/E Sheets/7WTC - E1/E36_37.tif","use":"General finished slab and top-of-steel notes"},{"id":"frankel-E38_39","path":"sources/wtc7/drawings/expanded-releases/12-009/NIST_WTC7_FOIA_12-009/NIST_WTC7_FOIA_12-009_WTC7_E_Sheets/E Sheets/7WTC - E1/E38_39.tif","use":"General finished slab and top-of-steel notes"},{"id":"frankel-E40_41","path":"sources/wtc7/drawings/expanded-releases/12-009/NIST_WTC7_FOIA_12-009/NIST_WTC7_FOIA_12-009_WTC7_E_Sheets/E Sheets/7WTC - E1/E40_41.tif","use":"General finished slab and top-of-steel notes"},{"id":"frankel-E42_43","path":"sources/wtc7/drawings/expanded-releases/12-009/NIST_WTC7_FOIA_12-009/NIST_WTC7_FOIA_12-009_WTC7_E_Sheets/E Sheets/7WTC - E1/E42_43.tif","use":"General finished slab and top-of-steel notes"},{"id":"frankel-E44_45","path":"sources/wtc7/drawings/expanded-releases/12-009/NIST_WTC7_FOIA_12-009/NIST_WTC7_FOIA_12-009_WTC7_E_Sheets/E Sheets/7WTC - E1/E44_45.tif","use":"General finished slab and top-of-steel notes"},{"id":"frankel-e46","path":"sources/wtc7/drawings/expanded-releases/12-009/NIST_WTC7_FOIA_12-009/NIST_WTC7_FOIA_12-009_WTC7_E_Sheets/E Sheets/7WTC - E1/e46.tif","use":"General finished slab and top-of-steel notes"},{"id":"frankel-e47","path":"sources/wtc7/drawings/expanded-releases/12-009/NIST_WTC7_FOIA_12-009/NIST_WTC7_FOIA_12-009_WTC7_E_Sheets/E Sheets/7WTC - E1/e47.tif","use":"General finished slab and top-of-steel notes"},{"id":"frankel-E48","path":"sources/wtc7/drawings/expanded-releases/12-009/NIST_WTC7_FOIA_12-009/NIST_WTC7_FOIA_12-009_WTC7_E_Sheets/E Sheets/7WTC - E1/E48.tif","use":"Roof slab high/low points and general steel datum"}],"limitations":["Lower partial floors and existing substation steel are not described by one general floor plane.","General elevations do not resolve every member-specific depression, slope, camber or splice workpoint.","The model ground datum is retained for registration; it is not a surveyed site grade."]}