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01 · Residential & high-rise · Gujarat, India

A 23-level residential tower, modelled at LOD 400

Two basements, ground and 17 floors, terrace and water tank: about 72 m tall. From 22 architecture, structure and MEPF DWGs, our AI model built three linked LOD 400 models, 81,179 rebar bars in 3D and 40 A1 sheets.

Scope
Architecture · Structure · MEPF · Rebar
Deliverables
3 linked RVT models · 40 A1 sheets · BBS · schedules
Year
2026
LOD 400ARC · STR · MEPFRebar & BBS39 custom families
A 23-level residential tower, modelled at LOD 400
4,355
Walls, with real layered build-ups
1,713
Doors & windows, all hosted
1,575
Rooms, named and numbered
6,948
Structural elements
17,010
MEPF elements, built in 44 minutes
40
A1 sheets, ARC + MEPF

01 · The read

The AI read 22 drawings. Every line.

Our AI model traced every beam with its mark and size from the nearest label, every wall, door and room, and the basement fire network, then checked the disciplines against each other. Two catches before modelling started: the drawings were drawn in metres while the file header said millimetres, and the brief said G+16 while the architecture clearly shows a 17th floor. Eight architecture-vs-structure mismatches went to the client as questions, not guesses.

22
DWGs read · ARC, STR, MEPF
3,324
Beams, mark + size from labels
8
Mismatches flagged to client
≤ 30 mm
ARC vs STR column fit
Beams traced over the structural drawing
Beams traced over the structural drawing
Walls, doors and rooms over the architecture plan
Walls, doors and rooms over the architecture plan
Fire network traced over MEPF
Fire network traced over MEPF

02 · Architecture

Every floor, built and tagged.

Every floor cut in 3D, typical floor plans with room tags and areas, elevations with the façade bands and fins, and the terrace with its louvres and cabin. Reading the elevations took assumed elements from 1,924 down to 15.

1,061 → 19
Revit warnings
1,924 → 15
Assumed elements
Typical floor · cut 3D, four flats
Typical floor · cut 3D, four flats
Floor plan · rooms, areas, marks
Floor plan · rooms, areas, marks
Elevations
Elevations
Ground floor · cut 3D
Ground floor · cut 3D
Terrace · louvres and cabin
Terrace · louvres and cabin

03 · Structure + MEPF

Structure and services, coordinated.

About 11,123 m³ of concrete across 6,948 structural elements. Eight MEPF systems, each colour-coded: a basement sprinkler network with 260 heads, 181 sleeves through beams, soil, waste and vent stacks for every floor, and 18 MEPF sheets.

11,123 m³
Concrete modelled
260
Sprinkler heads · basement
181
Sleeves through beams
8
MEPF systems, colour-coded
Whole MEPF model
Whole MEPF model
Structure · typical floors
Structure · typical floors
Sprinklers + wet riser
Sprinklers + wet riser
Basement fire network
Basement fire network
Soil, waste & vent stacks
Soil, waste & vent stacks
Typical floor · sprinklers, landing valves, hose reels
Typical floor · sprinklers, landing valves, hose reels

04 · Reinforcement

81,179 bars. Modelled in 3D.

Raft to the 7th floor: every bar on its host, with cover, hooks and spacing, checked against the bar data. Bars read from the structural drawings (ground-floor slab beams, ground and 7th-floor slabs) are shown in red. Where RC drawings were not in the set (raft, retaining walls, columns, core walls, stair), bars follow typical detailing to IS 13920 and are shown in blue, so the reviewer always knows which is which.

5,877
Rebar sets
258 t
Steel, Fe500D
−0.13%
Revit vs bar data
9
BBS schedules in Revit
All rebar · basement raft to L07
All rebar · basement raft to L07
Raft + retaining walls
Raft + retaining walls
GF slab + beams · whole floor
GF slab + beams · whole floor
GF slab beams · from drawings
GF slab beams · from drawings
Column cages + core walls
Column cages + core walls
Raft corner + retaining wall
Raft corner + retaining wall
Stair flights + landing
Stair flights + landing
7th-floor slab
7th-floor slab
MemberSetsBarsTonnes
Raft583,476136.04
Columns · B2, GF, L073,91558,89455.54
Retaining walls443,68443.57
GF slab beams1,0246,34812.73
Slabs · GF + L078188,3009.37
Core walls244160.89
Stair + landing61210.24
Total5,88981,239258.37

Bar bending summary by member, Fe500D (bar data). In Revit: 5,877 sets · 81,179 bars · 258.02 t (−0.13%). Weight = length × d² / 162.

05 · How the job is run

Run like a BIM department.

Every element carries an ID, level, status and source drawing, and a status colour tells the reviewer what came from the drawings, what is typical detailing and what is assumed. Codes in the LOD 400 matrix: IS 456, IS 13920, IS 1786, IS 1200, NBC 2016, IS 1172 / 2065.

  • BIM Execution Plan: roles, naming, LOD, exchange
  • LOD 400 matrix: what LOD 400 means for every element, its source and method
  • Sheet list: every A1 sheet planned before modelling
  • QC checklist: counts, hosts, warnings, overlaps
  • Content check: 39 families, every type checked
  • Questions log: open items sent to the client, not guessed
Modelled
Read from the drawings
Typical
Typical floor or typical detail
Assumed
Not on any drawing: flagged, listed
Enlarged toilet + kitchen plans
Enlarged toilet + kitchen plans
Electrical riser schematic
Electrical riser schematic

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Next case study

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