BIM Level of Detail Specification - 3d Laser Scanning · We try to eliminate as many Revit warnings...

BIM Level of Detail Specification

June 2018

3D Laser Scanning Measured Building Surveys

Digital Photogrammetry Measured Industrial Surveys 3D Scanner Data Processing

3Deling Ltd ul. Wincentego Pola 7/46

M +48 793 398 768 F +48 12 376 73 22

[email protected] [email protected]

31-532 Krakow, Poland EU VAT: PL 675 144 21 15 www.3deling.com

Level 1 – Mass Model

Modeling on the Level of Detail 1 is generally used for the depiction of the architectural context in which the investment is occurred. Based on the solid models of the building environmentthere is a chance to explore the level of sunlight.

least detailed and most generate model of BIM it presents the general form of the building, on this level no details like windows, doorways, elements of the service or architectural ones are

presented




M +48 793 398 768 F +48 12 376 73 22



Level 2 – Basic Structural model

Modeling on the level of detail 2 is used to create a base project in the preliminary architectural concept. For example, a BIM model (LoD2) generates details in the same way as a2D documentation in the scale 1:200.

the model contains the most important structural elements and openings in the buildingincluding floors, columns, beams and door openings and windows in a basic form

the model doesn’t present the elements of the installation or even architectural details,partition walls or interior doors




M +48 793 398 768 F +48 12 376 73 22



Level 3 – Basic Architectural model

Modeling on the level of detail 3 is used as a base project excluding the construction documentation. The BIM model (LoD3) generates details in the same way as a 2D documentation in the scale 1:50 or 1:100.

the model contains all structural elements and basic simplistic architectural details. external woodwork like doors and windows are marked on this level the inner walls with doors and installation components are presented




M +48 793 398 768 F +48 12 376 73 22



Level 4 – Detailed Architectural model

Modeling on the level of detail 4 is generally used for creating engineering projects, as well asfor the finishing projects. What more, the model BIM (LoD4) represents the most geometrically described architectural details.

this level contains in detail all structural elements as well as the architecturalones

modeled are even the smallest itemes of installation and furniture external woodwork like doors and windows along with door handles are marked



3Deling Ltd ul. Wincentego Pola 7/46 31-532 Krakow, Poland

M +48 793 398 768 F +48 12 376 73 22

EU VAT: PL 675 144 21 15

[email protected] [email protected] www.3deling.com

BIM QUALITY CONTROL PROTOCOL

At each stage of creation of a BIM model and after a complete process, we carry out Model Quality Check. In the list below, we included only the most important stages in the control process.

Client is informed about Project Base Point position usage and all levels and grids within the building by a provisional work-in-progress model with all these aspects indicated.

We use seven main stages in the creation of each model. Each stage has a quality check associated with the main topic of the phase. After each phase, there is a work-in-progress model available for the client.

We try to separate external, internal and partition walls into different wall subtypes. We use “Join” geometry only when needed or asked to. We try to balance the number of families with the number of parameters used within

the models. Our models are free of constraints. All temporary dimensions are purged. We use a rule of having only one level for each building floor in typical buildings.

In less typical buildings we use by default some auxiliary levels to provide an easieredition of mid-level floors, mezzanines or major structures.

Finished models are always purged, compacted and free of unnecessary views. We leave only one plane view of cutline at 1.2m per building story. We eliminate all unnecessary components from used materials to

keep them as light as possible. We try to simplify geometry of the objects to match the level of detail chosen for the model. Usage of in-place models or mass-based geometry is always consulted with the client and

limited to as few instances as possible. Most of our families don’t have nested elements,

are free of imported images and other unnecessary weight increasing elements. While creating MEP models, by default, we try to make a model as simple as possible,

eliminating all unplanned bends, damages and other typical issues.All simplified elements are marked up.

We try to eliminate as many Revit warnings as possible.We eliminate overlapping walls and most of wall joining problems,but sometimes we are forced to leave “slightly of axis” or “extreme shape editing” warnings due to point cloud-based nature of the models.

All point clouds and reference files are unloaded from the project file,but placeholders are left for potential use by the client.

Point clouds attached to the model have a corresponding named point cloud,that we sent to our clients. This makes them easy to use by “Reload From” option.

We use only light empty window families instead of system opening in Level 2 models.


Digital PhotogrammetryMeasured Industrial Surveys3D Scanner Data Processing

Level of Detail Check List

WALL L1 L2 L3 L4 Exterior

interior

Partition

FLOOR L1 L2 L3 L4 Floor

ROOF L1 L2 L3 L4 Roof Construction

Gutters

Downpipes

CEILING L1 L2 L3 L4 False Ceiling

STAIRS L1 L2 L3 L4 Stairs

STRUCTURE ELEMENTS L1 L2 L3 L4 Columns

Beam

3Deling Ltdul. Wincentego Pola 7/46

M +48 793 398 768F +48 12 376 73 22

[email protected]@3deling.pl




SERVICES L1 L2 L3 L4 Mechanical

Electrical

Plumbing

Sanitary

OPENINGS L1 L2 L3 L4 Window

Door

FIXTURES AND FURNISHINGS L1 L2 L3 L4 Fixture

Furnishing

MODELING ACCURACY Wall, Floor, Structure 15 mm 30 mm 50 mm

Roof 20 mm 40 mm 60 mm

Services 20 mm 40 mm 60 mm

Openings 15 mm 30 mm 50 mm


M +48 793 398 768F +48 12 376 73 22





Revit Version 2016 2017 2018 2019

2D Documentation generated from Revit model Yes No

Yes No Yes No Yes No Yes No

Floor Plans Reflected Ceiling Plans Sections Exterior Elevations Roof Plans Yes No

Comments:


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BIM Level of Detail Specification - 3d Laser Scanning · We try to eliminate as many Revit warnings...

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