Category Archives: Guidelines for Using Building Information Modelling

Guidelines for Using Building Information Modelling – Open Space Diagram

  • Open Space Diagram

Open Space Diagram should contain the following information, if applicable, but not limited to:

  • The location and dimensions of open space with reference to the site classification, and
    • Corresponding schedule and calculation.

Guidelines for Using Building Information Modelling – EVA Diagram

  • EVA Diagram

EVA Diagram should contain the following information, if applicable, but not limited to:

  • Demonstration of compliance with the Regulation 41D of the B(P)R, Part D of Code of Practice for Fire Safety in Buildings 2011 (FS Code) and PNAP APP-136 (such as calculation of the total perimeter of the building and length of major façade),
    • Principal dimensions showing the building perimeter and façade served by EVA as appropriate,
    • Demarcation of the EVA and the major façade, and
    • Corresponding schedule and calculation.

Guidelines for Using Building Information Modelling – Details

  • Details

Details should contain the following information, if applicable, but not limited

to: 
(a)Sufficient labelling to identify the location of details,
(b)Sufficient labelling to identify typical and non-typical details, and
(c)Sufficient critical dimensions, levels and design of building components
 in compliance with the BO and its regulations, relevant PNAPs and
 circular letters.

Typical examples for details required under various PNAPs include gas aperture, utility platform, balcony, A/C platform, curtain wall, non-structural prefabricated external wall, sunken slab, protective barrier, accessible toilet, tactile warning strips for escalators, projecting windows, acoustic windows, acoustic fins, vertical greening, cladding, vertical barrier at atrium, details of modular integrated construction, etc.

It is the common practice to use 2D details created by CAD, to complement the BIM model. CAD is also one of the acceptable computer softwares under Appendix F of PNAP ADM-19. BD is ready to accept the details produced by CAD or BIM provided that APs have clearly indicated the software in their  GBP electronic files.

Guidelines for Using Building Information Modelling – Section and Elevation

  • Section and Elevation

Section and elevation should contain the following information, if applicable, but not limited to:

  • Grids and grid dimensions showing principal dimensions of the building as appropriate,
    • Floor to floor height regarding structural floor levels,
    • Each floor level in HKPD,
    • Indication with dimensions of architectural features, projections, cladding and curtain wall, if any,
    • Street levels adjoining to corresponding section/ elevation,
    • Building height under the Building (Planning) Regulations (B(P)R) with reference to mean street level,
    • Building height restriction limit (mPD) under statutory town plans and government leases as stipulated in Joint Practice Note (JPN) No. 5, and
    • Colour code according to PNAP ADM-9.

Guidelines for Using Building Information Modelling – Floor Plan

  • Floor Plan

The floor plan should contain the following information, if applicable, but not limited to:

  • Demonstration of compliance with the BO and its regulations as well as the prescriptive requirements stipulated in various codes of practices, PNAPs and circular letters,
    • Grids and grid dimensions showing principal dimensions of the building, as well as the distance between structural columns,
    • Elevation and section marks for the corresponding view,
    • Wall thickness,
    • Room/space usage/building line above/door marks,
    • Dimensions     showing     the     size     of     rooms,     the                        width         of corridors/staircases, etc.,
    • Indication with dimensions of architectural features, projections, cladding, curtain wall, if any, and
    • Colour code according to PNAP ADM-9.

Guidelines for Using Building Information Modelling – Block / Key Plan

5.1.1  Block / Key Plan

Block / Key plan scale not less than 1:500, should contain the following information, if applicable, but not limited to:

(a)Site boundary,      
(b)Site area coloured in pink (recommended RGB: 255,218,236), 
(c)Lot number,      
(d)Specified streets for site classification,    
(e)Boundarycoordinatesanddimensions(examplesasillustratedin
Section 5.3.3),
(f)Location of vehicular run-in/out,    
(g)The extent of special areas (e.g. Scheduled Area, non-building area,
green/yellow/brown/special areas under the lease), and
(h)North direction symbol.      

Guidelines for Using Building Information Modelling – Essential Views

5.1.1  Essential Views

The BIM file should contain the following views, if applicable, but not limited

to:
(a)Block/ Key plan
(b)Floor plans
(c)Sections
(d)Elevations
(e)Typical details
(f)Emergency vehicular access (EVA) diagrams
(g)Open space diagrams
(h)Fire compartment diagrams
(i)Site area and site coverage (SC) diagrams
(j)GFA diagrams
(k)Usable floor area (UFA) diagrams
(l)Usable floor space (UFS) diagrams
  • Assessment of prescribed windows
  • Diagrams showing compliance with the Sustainable Building Design (SBD) Guidelines

Guidelines for Using Building Information Modelling – Essential Views for Composing the Prescribed Plans

  • Essential Views for Composing the Prescribed Plans

APs are recommended to set up the following views with sufficient information to demonstrate compliance with the BO and its regulations, relevant codes of practices, PNAPs and circular letters issued by the BA. For the verification of areas and dimensions as proposed in the prescribed plans using the submitted BIM file, the following views shall be included in the file composition.

Guidelines for Using Building Information Modelling – Technical Requirements 3D Model

5.1.1  3D Model

The BIM files should contain a 3D computer model representing the proposal on the site with its immediate surroundings. The model includes data of building components externally and internally, such as internal partition walls, internal staircases, building façades, windows, projections, architectural features, etc.

The 3D model should be able to be rotated in all directions for checking, viewing, zooming in/out, etc. by utilizing the functions of BIM software to facilitate inspection of building components and virtual walk-through of the building model in the first-person view.

Guidelines for Using Building Information Modelling – Technical Requirements Colour Code System

5.1.1  Colour Code System

This paragraph aims to introduce two colour code systems.

(a)   Building material and description on floor plans

PNAP ADM-9 specifies that every plan submitted for approval should be coloured to differentiate existing works from proposed new works. The preferred colour code as shown in Appendix A of PNAP ADM-9 should be adopted.

(b)   Gross Floor Area (GFA) diagrams

The preferred GFA colour code as described in Section 5.2.10 of the Guidelines should be adopted.