Topics covered in this study
|
1. Occupancy Classification |
2. Plot selection criteria |
3. Clearance from overhead electric lines |
4. Boundary wall allowable height |
5. Internal access road |
6. Pedestrian path or walkway |
7. Side and rear separation distances |
8. Internal courtyard size |
9. Permitted construction in mandatory open space |
10. Height limitations based on road width |
11. Specified requirements for parts of industrial buildings
|
12. Landscaping |
13. Damp proofing and waterproofing of floors and walls |
14. FIRE PROTECTION- Occupant load factor, capacity of exit components |
15. Corridors and passageways, doorways |
16. Stairways |
17. Horizontal exits, number of exits and travel path distance |
18. Smoke proof enclosure |
19. Means of exit signs and illumination |
20. Fire Resistance rating of common construction elements |
Definition of Industrial building: Factories and other premises used for manufacturing, altering, repairing, cleaning, washing, breaking-up, adapting or processing any article; generating power or slaughtering livestock.
These buildings may also be storage and handling of raw or finished materials or goods.
- Classification of Industrial Warehouse
Bangladesh National Building Code (2015) Volume 1- Chapter 1, Part 3, Pages 3 to 5, House building and Research Institute
Table 3.1.1 – Occupancy Classification
2.Plot Selection criteria:
Site Selection: Water logging free. Abandoned site with refuse deposit should be avoided. Excreta or other material free site.
Provision of any vacant space within plot: Effectively drained by surface or underground drainage system.
Sanitary waste disposal facility: Required utility service authority’s written approval.
Plot size: At least 300 m2 with road frontage width ≥ 15m
- Clearance from overhead electric lines
A building or any part of it shall not be erected within the distance shown in the Table 3.1.3 from any overhead electric line.
4. Boundary wall allowable height
If boundary wall is higher than stated below, special permission will be required.
If boundary wall is:
1. Solid |
Max height 1.5 meters |
No permission required |
2. Open (grilled, jail, balustrade) |
Max height 2.75 meters |
No permission required |
3. Combination of 1 and 2 above |
Max height of solid part is 1.5 meters |
No permission required |
- Internal Access road
International road: set back ≥ 250 mm from boundary wall or property line
Approach road: ≥ 9 m wide
Pedestrian walkway: width ≥ 1.0 m (not enclosed by adjacent walls on both sides)
width ≥ 1.25 m (if enclosed)
- Pedestrian Path or walkway
- An uncovered paved path that links building and the approach road shall not be included as floor area of building.
- The walkways should not be used for any other purpose than pedestrian movement and accessibility route.
- The minimum width of pedestrian path shall not be less than the calculated width of the connected corridor or passage. If pedestrian paths are enclosed by adjacent walls on both sides, the minimum width shall be 1.25m
- Any changes in elevation in accessibly route, shall comply with provisions of Universal accessibility.
- Side and Rear separation distances
In a corner situation where two frontages of a plot intersects each other and form a sharp corner a turning clearance with a minimum radius of 2m shall be required as per guidelines of figure 3.1.3. No construction or visual obstruction shall be allowed within such turning clearance space.
Minimum rear and Side open space Requirements of a plot.
Rear |
≥ 3.0 m |
Side |
≥ 3.0 m |
For any plot size (m2):
Separation of building in the same plot:
Open space requirement between adjacent buildings in the same plot in different layout.
8. Courtyard or Internal Courtyard size
- Permitted construction in mandatory open space:
Not higher than 10 storey or 32 m- Maximum 1/3 x mandatory exterior open space
If higher than 10 storey:
- No construction higher than 2.75 m from formation level.
- No door, window, ventilator on any wall adjacent to the abutting property or street.
- No direct entrance to garage from road. Minimum 1.5 m distance between entrance to the garage and property line adjoining the road.
- No discharge from roof directly to adjacent property or street.
- No structure or room over garage or other permitted service structure.
- Roof of any construction in mandatory open space cannot be used as balcony or terrace.
Extensions:
Roof or cornice into mandatory open space |
0.5 m |
Shading device |
Max. 0.75 m, at least 2.5 m above formation ground level. |
Cantilever canopy |
At least 2.5 m above formation level Clearance between Edge of canopy and property line= 1.5 m |
Balcony level |
Higher than 6 m and may project not more than 9 m |
Underground construction |
Water reservoirs, septic tanks, inspection pits, sewer line- project max. 150 mm above formation level. |
- Height limitations based on road width
- Specified requirements for parts of industrial buildings
Minimum Ceiling heights for different occupancies
Kitchen
Clear height |
≥ 2.75 m |
Clear height (if mechanical exhaust present) |
≥ 2.15 m |
Floor area |
≥ 4 m2 |
Width |
≥ 1.5 m |
Window area |
≥ 1 m2 |
Toilets
Clear height |
≥ 2.15 m |
Width |
≥ 1 m |
Floor area · WC and bathing · Without WC · With only WC · 3 fixture bathroom (bathing, washing, WC) |
≥ 2.8 m2 ≥ 1.5 m2 ≥ 1.2 m2 ≥ 3 m2 area and width ≥ 1.25 m |
Stairway dimensions
- Width ≥ 2.15 m
- Riser height and tread depth = 400mm to 425mm
- Clear head room between flights of staircase ≥ 2.15 m
- Clear height of any passage below landing providing access to non-habitable and service space ≥ 2.03 m
- Clear height of all other passages and spaces below landing ≥ 2.15 m
- Handrails height ≥ 0.9 m
Continue to Part 2: Rules from BNBC: FIRE PROTECTION
A breakdown of all the studies have been compiled in my Warehouse design blog
For convenience, I here are direct links to all the Research topics with proper reference.
- Introduction to modern "Bazaar"
- Literature Synthesis and Typology of warehouses
- Why the 19th century warehouse did not sustain? History
- Case Study of- A warehouse with over 3000 orders a day
- Site Analysis of Tejgaon Industrial Area/ Development Trend of Tejgaon Industrial Area/ Number of plots and their floor area
- Defining site and its surroundings according to theories of Kevin Lynch/ Site Location/ Site Area etc.
- Site surroundings, Location of electric poles and existing site images
- Project Programme
- Difference between traditional and modern Warehousing
- Fundamentals of Modern Warehousing
- Warehouse building types
- Warehouse and the Industrial Revolution
- What is Industry 4.0?
- Storage efficiency with various handling methods
- Industrial truck (forklift) dimensions
- Autonomous Vehicles in warehouse logistics
- Industrial Pallets, Standard pallet patterns and Standard Pallet sizes
- Loading Bay sizes, planning and Layout criteria
- Planning for fire control and Fire compartmentalization
- Amenity and Hygiene/ Washing and toilet facilities/ workplace design considerations
- Rules from BNBC Part I
- Rules from BNBC Part II Fire Protection
- List of flammable items/ Combustible dust dangers in a grocery warehouse
- Rat proofing/ Termite proofing in industrial buildings
- Industrial Shelves
- Field Survey
- Design Documents: FAR Calculation and Building code (RAJUK)
- Concept info graphic, Massing diagram and Volume Analysis
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Read the Next Article: Rules from BNBC Part II Fire Protection
Read the Previous Article: Amenity and Hygiene/ Washing and toilet facilities/ workplace design considerations
Link to Full portfolio: https://shawlin.net/blogs/architecture-portfolio