Revit modelling guide

1. Units (Manage › Project Units): Length mm, 0 decimals; Area m², 2 decimals; Volume m³; Angle degrees; Slope %.
2. Origin: leave the Project Base Point on the Revit internal origin. Internal origin = Project Base Point = front-left corner of the lot seen from the street at (0, 0, 0), with Z = 0 at ±0.000 = ground-floor finished floor. +X runs along the street (10.0 m), +Y into the lot (15.0 m); Project North = up = +Y, so plans read with the street at the bottom.
3. Survey Point: when the land survey arrives, move the (unclipped) Survey Point to the surveyed coordinates of the same lot corner and set its elevation to the surveyed height of ±0.000 in the national (Hòn Dấu) height datum. Do not move the Project Base Point.
4. True North (Manage › Project Location › Position › Rotate True North): True North is 45° clockwise from Project North (rotate the north arrow 45° towards +X). Check: in a plan view with Orientation = True North, the street façade (facing −Y) must face bearing 135° (South-East, Đông Nam). The data is consistent: −Y points to 135°.
5. Project Information (Manage › Project Information) — fill in:

Area settings (Architecture › Room & Area › Area and Volume Computations): Area computation At wall finish, Volume computation on. Create a project parameter Tên phòng (Text, Rooms) for the Vietnamese room names — the helper script fills it when it exists.

Floor-to-floor heights: GF → L1 4100 mm · L1 → RF 3400 mm · RF → TR 3200 mm. The ground floor is 300 mm above the sidewalk; building height is measured from the sidewalk [TCVN 9411:2012 6.4.1.1].

Wall types

Under review — to be confirmed Wall plaster thicker than 12 mm

Drawing the walls

1. Location Line Wall Centerline; Room Bounding on; Structural off (brick infill in an RC frame).
2. Set the Mark of each wall to the wall id below so schedules can be compared with walls.csv.
3. Base and top constraints as listed. Walls start on the structure — the top of the beam under them, else the RC top of the slab — so the floor finish and its waterproofing stop at the wall face:
   • GF −150 on the ground beams (12 walls); −50 on the RC top of S-GF (GF-P-WC); −200 on ground beam GB-1/A-B (GF-FRONT-AB) — GB-1/A-B is at −200 = the RC top of S-GF-GARAGE
   • L1 −50 on the beams (16 walls)
   • RF −130 on the beams (10 walls)
   • TR −170 on the beams (4 walls)
   “Up to level” walls stop under the slab above (a negative top offset: the underside of the slab, a lowered or sunken one included); parapets are unconnected, from their base to the underside of the coping (below).
4. Revit puts a wall’s exterior face on the left of the drawing direction (that is why walls drawn clockwise face outwards). Walls marked flip have their exterior on the right of start → end: draw them from end to start, or flip them (Space) — the exterior paint layer must face the side named in the table.
5. Party walls: the outer face is on the lot boundary, so the whole wall stays inside the lot [TCVN 9411:2012 4.6]; no openings in them [TCVN 9411:2012 6.4.3.1].

Walls per level: GF 14 (EXT-220 ×5, INT-220 ×8, INT-110 ×1) · L1 16 (EXT-220 ×5, INT-220 ×9, INT-110 ×2) · RF 10 (EXT-220 ×4, INT-220 ×1, PAR-220 ×5) · TR 4 (PAR-220 ×4).

Floor types

Layers listed as 0 mm are waterproofing membranes: give them the function Membrane Layer — Revit only accepts 0 mm for a membrane (and nothing else may be 0 mm), so the type thickness stays the sum of the layers (FL-GF-WC, FL-WC-450, FL-OUT-170, RF-250, TR-290). The RC layer is the core (inside the core boundaries); screeds to falls may be made the variable layer.

Floors to sketch

The same opening on several levels may also be modelled as one Shaft Opening instead of sketch holes: 4080 × 2100 at (220, 6890)–(4300, 8990) through L1 and RF (the stair well).

Access openings over the buried tanksLỗ thăm bể ngầm

Each cover of a buried tank is an opening through the floor above it: sketch it as a hole in that floor (the helper script does) and place the cover as a floor-hosted generic model; the tank lid below has a matching opening. None of them crosses a beam, a wall or a piece of furniture in the data. Covers under a parked vehicle: SV-septic under F-G-car, between its wheel tracks — heavy-duty covers.

Lowered, sunken and level-access floorsSàn hạ cốt

Each sits in a notch or a hole of its level’s main slab, at its own height offset; its RC top is lower than the main slab’s so the finish build-up (falls, waterproofing, fill) fits and the finished floor ends where the table says. The beams around a sunken slab are deep enough to frame it: their soffit is below the sub-slab soffit.

The drop depth is a structural decision (no TCVN gives it) [Wet-room practice]; waterproofing turns up ≥ 20 cm [TCVN 5718:1993 3.1.3].

Service shaftsHộp gen kỹ thuật

Model each shaft as one Shaft Opening (Architecture › Opening › Shaft) with the rectangle below: it cuts every floor it passes through, so the shaft holes need not be sketched (the helper script does this). The rooms already stop at the shaft rectangle; box the shaft in on its open sides with a thin enclosure inside the rectangle (brick or moisture-resistant board — the type is not in the data yet), with an access panel at each floor, and carry the vent upstand and cowl above the roof slab. A Shaft Opening does not cut structural framing: no beam crosses a shaft rectangle on the floors it passes through, so the shafts stay clear.

Inside the Shaft Opening, model the pipes as vertical pipes of the listed diameter (or leave them to the MEP model). Each stack ends where listed: a drainage stack at its tank or pit below the ground floor (buried routes in step 10), a stack to the roof at the cowl on top of the opening.

Structural columns

1. Load M_Concrete-Rectangular-Column; create type C1 220 x 220 (b × h from the table).
2. Place one column per storey (Structure › Column › At Grids — every column is on a grid intersection). Each column starts on the structure under it — the top of the beams that meet at its foot (the lowest one where they differ) — so the Base Offset differs per column:
   • GF (18 columns, top L1 −170 / L1 −220): base −150 on the ground beams (16 columns); −200 on ground beam GB-1/A-B (C-GF-A/1, C-GF-B/1) — GB-1/A-B is at −200 = the RC top of S-GF-GARAGE
   • L1 (18 columns, top RF −250): base −50 on the beams (15 columns); −100 on beams B-L1-1/B-C, B-L1-1/C-D (C-L1-B/1, C-L1-C/1, C-L1-D/1) — B-L1-1/B-C and B-L1-1/C-D are at −100 = the RC top of S-L1-LOGGIA
   • RF (9 columns, top TR −290): base −130 on the beams (9 columns)
   Set each Mark to the storey-qualified mark below (e.g. C-GF-A/1) so marks never repeat — the helper script does the same.
3. Column tops in the data stop at the underside of the slab above (e.g. C-GF-B/1 top L1 −170). For a connected analytical model carry them up (script setting COLUMNS_TO_BEAM_TOP, or Top Offset by hand) to where the column above starts (e.g. C-GF-B/1 to L1 −100 = the base of C-L1-B/1), or to the top of the highest beam framing in where nothing continues above (e.g. C-L1-A/1 to RF −130): the storeys then meet with no gap and no overlap. The concrete is cast to the beam soffit either way.

Structural framing (beams)

1. Load M_Concrete-Rectangular Beam; create the types b × h: 220 x 300 (×36), 220 x 350 (×19), 220 x 400 (×24), 220 x 500 (×12), 220 x 600 (×3).
2. Draw each beam from start to end on its reference level, z-justification Top, Start and End Level Offset as listed. The top of each beam is the RC top of the slabs it carries — the lowest one where a lowered sub-slab runs over part of it — and the ground beams (giằng móng) sit at their datum unless a lowered sub-slab runs over them:
   • GF −150 (the ground-beam datum; 25 beams); −200 = the RC top of S-GF-GARAGE that runs over it: GB-1/A-B (under door D-01, the garage rolling shutter)
   • L1 −50 (the RC top of S-L1; 27 beams); −100 = the RC top of S-L1-LOGGIA that runs over them: B-L1-1/B-C (under the guard upstand R-L1-LOGGIA-1), B-L1-1/C-D (under the guard upstand R-L1-LOGGIA-2), B-L1-C/1-2a
   • RF −130 (the RC top of S-RF; 27 beams)
   • TR −170 (the RC top of S-TR; 11 beams)
3. Every beam runs between two supports: draw each one in the table as its own member, from its start to its end, even where the next one continues in line. Watch the joints where one line of beams is split — at the columns of a partial grid line (1a), off the grids, or where the top changes:
   • GF GB-1/A-B + GB-1/B-C at (3755, 1260) (on column B/1, tops −200 / −150); GB-A/1-1a + GB-A/1a-2 at (110, 4400) (on column A/1a); GB-B/1-1a + GB-B/1a-2 at (3755, 4400) (on column B/1a)
   • L1 B-L1-1/A-B + B-L1-1/B-C at (3755, 1260) (on column B/1, tops −50 / −100); B-L1-A/1-1a + B-L1-A/1a-2 at (110, 4400) (on column A/1a); B-L1-B/1-1a + B-L1-B/1a-2 at (3755, 4400) (on column B/1a); B-L1-C/1-2a + B-L1-C/1-2b at (6355, 2680) (on beam BS-L1-01, off the grids, tops −100 / −50)
   • RF B-RF-A/1-1a + B-RF-A/1a-2 at (110, 4400) (on column A/1a); B-RF-B/1-1a + B-RF-B/1a-2 at (3755, 4400) (on column B/1a)
4. Grid segments between two columns with no beam:
   • L1: no beam on grid B 2–3 — it would cut into the stair opening of ST-01 (x 220–4300, y 6890–8990); the opening is framed by B-L1-2/A-B, B-L1-2/B-C, B-L1-3/A-B, B-L1-3/B-C, B-L1-A/2-3, BS-L1-02.
   • L1: no beam on grid 1a A–B — no opening there: nothing ties columns A/1a and B/1a at this floor; the structural engineer to confirm whether a tie beam is needed (model none until then).
   • RF: no beam on grid B 2–3 — it would cut into the stair opening of ST-02 (x 220–4300, y 6890–8990); the opening is framed by B-RF-2/A-B, B-RF-2/B-C, B-RF-3/A-B, B-RF-3/B-C, B-RF-A/2-3, BS-RF-02.
   • TR: no beam on grid B 2–3 — it would cut into the skylight opening SK-01 (x 1320–3720, y 7040–8840); no beam frames that opening in the data (structural engineer to design the trimming).

Handrails 900 mm; guards on open sides ≥ 900 mm with gaps ≤ 100 mm, landings not narrower than the flight [TCVN 13967:2024 5.11]. Add the guard at the stair opening on the upper level: R-RF-STAIR (RF) (4300, 7890) → (4300, 8990), 1100 mm, steel.

Per level: GF 8 doors/openings + 4 windows · L1 9 doors/openings + 4 windows · RF 4 doors/openings + 1 windows.

Open-plan rooms in the data stop at the face a 220 wall would have, so two lines 220 mm apart separate e.g. the hall and the dining room; the strip between them is left without a room. A single line on the grid instead adds half a strip to each of those rooms.

Railings

Guards at the loggia and terraces ≥ 1 100 mm, no gap passing a 100 mm sphere and not easy to climb [QCXDVN 05:2008/BXD Bảng 3.2, 3.4.1.7]; the roof-terrace parapets are walls (step 4).

Canopies and skylight

The entrance canopy (ô văng) is excluded from the footprint only if it meets fire and construction safety rules and is not used as a balcony [QCVN 01:2021/BXD 1.4.20]; canopy undersides over doors ≥ 2.5 m above ground [Bộ luật Dân sự 2015 (91/2015/QH13) Art. 178]. Downpipes pass through these concrete canopies — cut a sleeve in the canopy floor around each (a Floor opening, or a void in the sketch): CN-03: SV-dp-1 at (300, 13000)–(450, 13150), SV-dp-2 at (9550, 13000)–(9700, 13150), SV-dp-5 at (550, 13000)–(700, 13150); CN-04: SV-dp-1 at (300, 13000)–(450, 13150), SV-dp-2 at (9550, 13000)–(9700, 13150), SV-dp-5 at (550, 13000)–(700, 13150).

SiteSân, cổng, bậc

1. Toposolid (or Toposurface + Building Pad in older versions) for the lot 10.0 × 15.0 m at the yard level −0.150; the sidewalk strip outside the lot at −0.300 (3.0 m wide, then the road). The red line is assumed on the front boundary (y = 0) and the building line on the front setback (y = 1150) until the planning information confirms them. Building footprint pad under the ground floor; the garage floor and the other sub-slabs at their own offsets (step 5).
2. Paving: one Floor of a paving type per surface below — never one surface for the whole front yard. A sloped surface gets a slope arrow from its street edge to its rear edge (or set the two edges as toposolid points); a level one is a plain floor at its height. The edges with a level change are a kerb or a step (model them as a thin wall, or let the floors meet with the drop):

3. Entrance step SE-step at (3955, 750)–(6155, 1150): top ±0.000, bottom −0.150, standing on SE-yard-front — one riser of 150 mm from the paving in front of it. A floor (or an in-place mass) at that top; the paving runs under it.
4. Gates as generic models (or a curtain-wall / fence family): the posts and frame from their bottom to the top; the leaves from their own, higher bottom, so they clear the paving they swing over. Leaves open into the lot, never over the sidewalk:

5. Gratings and covers sit in the paving at its level (generic models hosted on the paving floor, or set at these tops): SV-trench trench drain across the driveway top −0.264 in SE-drive (paving −0.274 → −0.254, 10 above at one edge); SV-trench-2 trench drain along the pedestrian yard top −0.160 in SE-yard-front (paving −0.150, 10 below at one edge); SV-mh-2 front inspection pit top −0.254 → −0.176 in SE-drive (paving −0.254 → −0.176, flush); SV-mh-1 rear inspection pit top −0.150 in SE-yard-rear (paving −0.150, flush).
6. Fences and boundary walls as walls or generic models from the site table below (SE-fence-1, SE-fence-2, SE-bwall-fl, SE-bwall-fr, SE-bwall-rl, SE-bwall-rr, SE-bwall-rear); neighbours as simple masses for context (optional), heights above the sidewalk: Neighbour (assumed 3 storeys) 10.5 m → top +10.200; Neighbour (assumed 2 storeys) 7.5 m → top +7.200.

ServicesThoát nước, cấp nước, điện

Tanks, pits and boxes as generic models (or plumbing / electrical equipment) at the rectangle and levels below, drains as plumbing fixtures, downpipes as vertical pipes. Every drain and pipe names where it discharges, ending at the public drain; the shaft stacks are in step 5 and the covers of the buried tanks are openings in the ground-floor slabs (step 5). 2.05 Side terrace has no drain of its own: its floor falls to SV-rd-2 and SV-rd-4. Same rows as services.csv.

Buried pipes under the ground floor and the yards: draw them as Pipes (or as model lines on a foundation plan) along these points, below the slab on grade, falling towards the element they end at; invert levels and falls are for the MEP engineer. Where a run crosses a ground beam, a sleeve is cast through the beam.

Furniture (optional)

Generic families for scale only: GF car ×1, GF motorbike ×1, GF wardrobe ×3, GF shelf ×3, GF sofa ×1, GF coffee-table ×1, GF tv-unit ×1, GF shower ×1, GF wc-pan ×1, GF basin ×1, GF kitchen-counter ×2, GF fridge ×1, GF dining-table ×1, GF chair ×6, GF bed-queen ×1, L1 bed-queen ×2, L1 desk ×2, L1 wardrobe ×4, L1 sofa ×1, L1 tv-unit ×1, L1 bed-king ×1, L1 shower ×2, L1 wc-pan ×2, L1 basin ×2, L1 bed-single ×1, RF altar ×1, RF washing-machine ×1, RF sink ×1, RF ac-outdoor ×2, RF ladder ×1, RF planter ×1, TR water-tank ×1, TR solar-heater ×1. Positions are in 10by15-house.json (furniture).

View templates

• 10B15 Plan 1:100 — Detail Level Medium, cut patterns on, furniture on (family review) or off (permit set), grids and room tags.
• 10B15 Plan 1:50 set-out — Detail Level Fine, dimensions to grids and wall centrelines, door and window tags, no furniture.
• 10B15 Ceiling 1:100 — ceiling plans with ceiling heights from the room schedule.
• 10B15 Structural 1:100 — columns and beams with marks, architecture halftone.
• 10B15 Elevation 1:100 and 10B15 Section 1:50 — level heads on both sides, the REF datums visible, material tags.

Title block fields come from Project Information (step 1). Keep the status line “Concept — not for construction” until a licensed designer issues the drawings.