OBC 2006 › Division B
4.1.5.
Version 0 — in force 31 December 2006
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- Edition
- OBC_2006
- Division
- B
- Provision
- 4.1.5.
- Version
- v0
(1) This Regulation comes into force on December 31, 2006.
Read directly from the regulation's own commencement section.
O. Reg. 350/06 · commencement 2.2.1.1(1)
This version stayed in force until the next edition replaced it. What follows is that edition’s base regulation’s commencement — the takeover that ended this one.
(1) Subject to Sentences (2) and (3), this Regulation comes into force on January 1, 2014.
Read directly from the regulation's own commencement section.
O. Reg. 332/12 · commencement 4.4.1.1(1)
This looks wrong
Tell us what is wrong and we will verify & correct our mapping.
- Edition
- OBC_2006
- Division
- B
- Provision
- 4.1.5.
- Version
- v0
(1) This Regulation comes into force on December 31, 2006.
Read directly from the regulation's own commencement section.
O. Reg. 350/06 · commencement 2.2.1.1(1)
This version stayed in force until the next edition replaced it. What follows is that edition’s base regulation’s commencement — the takeover that ended this one.
(1) Subject to Sentences (2) and (3), this Regulation comes into force on January 1, 2014.
Read directly from the regulation's own commencement section.
O. Reg. 332/12 · commencement 4.4.1.1(1)
Provenance
OBC 1997 · renumbered from 4.1.6. — Pro
Base · O. Reg. 350/06 · ext← current
Original — base regulation
OBC 2012 · continues as 4.1.5. — Pro
4.1.5. — Live Loads Due to Use and Occupancy
Content not available for this version.
4.1.5.1. — Loads Due to Use of Floors and Roofs
(1) Except as provided in Sentence (2), the specified live load on an area of floor or roof depends on the intended use and occupancy, and shall not be less than the uniformly distributed load patterns in Article 4.1.5.3.v1, the loads resulting from the intended use or the concentrated loads in Article 4.1.5.10., whichever produces the most critical effect.
(2) For buildings in the Low Importance Category as described in Table 4.1.2.1.B., a factor of 0.8 may be applied to the live load.
Text · e-Laws consolidated snapshot
4.1.5.2. — Uses Not Stipulated
(1) Except as provided in Sentence (2), where the use of an area of floor or roof is not provided for in Article 4.1.5.3.v1, the specified live loads due to the use and occupancy of the area shall be determined from an analysis of the loads resulting from the weight of,
(a) the probable assembly of persons,
(b) the probable accumulation of equipment and furnishings, and
(c) the probable storage of materials.
(2) For buildings in the Low Importance Category as described in Table 4.1.2.1.B., a factor of 0.8 may be applied to the live load.
Text · e-Laws consolidated snapshot
4.1.5.3. — Full and Partial Loading
(1) The uniformly distributed live load shall be not less than the value listed in Table 4.1.5.3., which may be reduced as provided in Article 4.1.5.9., applied uniformly over the entire area, or on any portions of the area, whichever produces the most critical effects in the members concerned.
Editor's note
As filed in O. Reg. 350/06, Table 4.1.5.3. uses the single word 'percent' ('at least 80 percent') and spaces each footnote in the notes after the marker ('(1) See Article 4.1.5.6.'). The consolidated e-Laws text renders 'per cent' as two words and closes the footnote-marker space ('(1)See Article 4.1.5.6.'); neither change was enacted by any amending regulation, and the as-filed spelling and spacing are retained here.
Text · e-Laws consolidated snapshot
| Column 1 | Column 2 |
| Use of Area of Floor or Roof | Minimum Specified Load, kPa |
| Assembly Areas |
|
| (a) Except for those areas listed under (b) and (c), assembly areas with or without fixed seats including | 4.8 |
| Arenas | |
| Auditoria | |
| Churches and similar places of worship | |
| Dance floors | |
| Dining areas (1) | |
| Foyers and entrance halls | |
| Grandstands, reviewing stands and bleachers | |
| Gymnasia | |
| Museums | |
| Promenades | |
| Rinks | |
| Stadia | |
| Stages | |
| Theatres | |
| Other areas with similar uses | |
| (b) Assembly areas with fixed seats that have backs over at least 80 percent of the assembly area for the following uses: | 2.4 |
| Churches and similar places of worship | |
| Courtrooms | |
| Lecture halls | |
| Theatres | |
| (c) Classrooms with or without fixed seats | 2.4 |
| Attics |
|
| Accessible by a stairway in residential occupancies only | 1.4 |
| Having limited accessibility so that there is no storage of equipment or materials() | 0.5 |
| Balconies |
|
| Exterior | 4.8 |
| Interior and mezzanines that could be used for the assembly of people as a viewing area (2) | 4.8 |
| Interior and mezzanines other than above | (2) |
| Corridors, lobbies and aisles |
|
| Other than those listed below | 4.8 |
| Not over 1 200 mm in width and all upper floor corridors of residential areas only of apartments, hotels and motels (that can not be used for the assembly of people as viewing area) (2) | (2) |
| In a Group B, Division 3 occupancy that contains sleeping accommodation for not more than 10 persons and not more than 6 occupants require assistance in evacuation in case of an emergency. | 2.4 |
| Equipment areas and service rooms including | 3.6(3) |
| Generator rooms | |
| Mechanical equipment exclusive of elevators | |
| Machine rooms | |
| Pump rooms | |
| Transformer vaults | |
| Ventilating or air-conditioning equipment | |
| Exits and fire escapes | 4.8 |
| Factories | 6.0(3) |
| Footbridges | 4.8 |
| Garages for |
|
| Passenger cars | 2.4 |
| Unloaded buses and light trucks | 6.0 |
| Loaded buses and trucks and all other trucking spaces | 12.0 |
| Kitchens (other than residential) | 4.8 |
| Libraries |
|
| Stack rooms | 7.2 |
| Reading and study rooms | 2.9 |
| Office areas (not including record storage and computer rooms) located in |
|
| Basement and first storey | 4.8 |
| Floors above first storey | 2.4 |
| Operating rooms and laboratories | 3.6 |
| Patients' bedrooms | 1.9 |
| Recreation areas that cannot be used for assembly purposes including | 3.6 |
| Billiard rooms | |
| Bowling alleys | |
| Pool rooms | |
| Residential areas (within the scope of Article 1.3.3.2 of Division A) |
|
| Sleeping and living quarters in apartments, hotels, motels, boarding schools and colleges | 1.9 |
| Work areas within live/work units | 2.4 |
| Residential areas (within the scope of Article 1.3.3.3v1 of Division A) |
|
| Bedrooms | 1.4 |
| Other areas | 1.9 |
| Stairs within dwelling units | 1.9 |
| Retail and wholesale areas | 4.8 |
| Roofs | 1.0(4) |
| Sidewalks and driveways over areaways and basements | 12.0 |
| Storage areas, including locker rooms in apartment buildings | 4.8(3) |
| Toilet areas | 2.4 |
| Underground slabs with earth cover | (5) |
| Warehouses | 4.8(3) |
Notes to Table 4.1.5.3.:
(1)See Article 4.1.5.6.
(2)See Article 4.1.5.4.
(3)See Article 4.1.5.7.
(4)See Article 4.1.6.1.
(5)See Article 4.1.5.5.
4.1.5.4. — Loads for Occupancy Served
(1) The following shall be designed to carry not less than the specified load required for the occupancy they serve, provided they cannot be used by an assembly of people as a viewing area:
(a) corridors, lobbies and aisles not more than 1 200 mm wide,
(b) all corridors above the first storey of residential areas of apartments, hotels and motels, and
(c) interior balconies and mezzanines.
Text · e-Laws consolidated snapshot
4.1.5.5. — Loads on Exterior Areas
(1) Exterior areas accessible to vehicular traffic shall be designed for their intended use, including the weight of fire fighting equipment, but not for less than the snow and rain loads prescribed in Subsection 4.1.6.
(2) Except as provided in Sentences (3) and (4), roofs shall be designed for the uniform live loads specified in Table 4.1.5.3.v1, the concentrated live loads listed in Table 4.1.5.10., or the snow and rain loads prescribed in Subsection 4.1.6., whichever produces the most critical effects in the members concerned.
(3) Exterior areas accessible to pedestrian traffic, but not vehicular traffic, shall be designed for their intended use, but not less than the greater of,
(a) the live load prescribed for assembly areas in Table 4.1.5.3.v1, or
(b) the snow, and rain prescribed in Subsection 4.1.6.
(4) Roof parking decks shall be designed for the uniformly distributed live loads specified in Table 4.1.5.3.v1, the concentrated live loads listed in Table 4.1.5.10., or the roof snow load, whichever produces the most critical effect in the members concerned.
Text · e-Laws consolidated snapshot
4.1.5.6. — Loads for Dining Areas
(1) The minimum specified live load listed in Table 4.1.5.3.v1 for dining areas may be reduced to 2.4 kPa for areas in buildings that are being converted to dining areas, provided that the floor area does not exceed 100 m² and the dining area will not be used for other assembly purposes, including dancing.
Text · e-Laws consolidated snapshot
4.1.5.7. — Floor Loads Due to Intended Use
(1) Equipment areas and service rooms, factories, storage areas and warehouses shall be designed for the live loads due to their intended use but not less than the specified loads listed in Table 4.1.5.3.v1
Text · e-Laws consolidated snapshot
4.1.5.8. — More Than One Occupancy
(1) Where an area of floor or roof is intended for 2 or more occupancies at different times, the value to be used from Table 4.1.5.3.v1 shall be the greatest value for any of the occupancies concerned.
Text · e-Laws consolidated snapshot
4.1.5.9. — Variation with Tributary Area
(1) An area used for assembly occupancies designed for a live load of less than 4.8 kPa and roofs designed for the minimum loading specified in Table 4.1.5.3.v1 shall have no reduction for tributary area.
(2) Where a structural member supports a tributary area of a floor or a roof, or a combination of them, that is greater than 80 m² and either used for assembly occupancies designed for a live load of 4.8 kPa or more, or used for storage, manufacturing, retail stores, garages or as a footbridge, the specified live load due to use and occupancy is the load specified in Article 4.1.5.3.v1 multiplied by,
0.5 + 
where A is the tributary area in square metres for this type of use and occupancy.
(3) Where a structural member supports a tributary area of a floor or a roof or a combination of them, that is greater than 20 m² and used for any use or occupancy other than assembly occupancies and those indicated in Sentences (1) and (2), the specified live load due to use and occupancy, is the load specified in Article 4.1.5.3.v1 multiplied by,
0.3 + 
where B is the tributary area in square metres for this type of use and occupancy.
(4) Where the specified live load for a floor is reduced in accordance with Sentences (2) or (3), the structural drawings shall indicate that a live load reduction factor for tributary area has been applied.
Editor's note
As filed in O. Reg. 350/06, Sentence (4) of this article reads 'reduced in accordance with Sentences (2) or (3),' (plural 'Sentences'). The consolidated e-Laws text renders this in the singular ('Sentence'); this wording difference was not enacted by any amending regulation, and the as-filed text is retained here.
4.1.5.10. — Concentrated Loads
(1) The specified live load due to possible concentrations of load resulting from the use of an area of floor or roof shall not be less than that listed in Table 4.1.5.10. applied over an area of 750 mm by 750 mm located so as to cause maximum effects, except that for occupancies not listed in Table 4.1.5.10., the concentrations of load shall be determined in accordance with Article 4.1.5.2.
Text · e-Laws consolidated snapshot
Column 1 | Column 2 |
Area of Floor or Roof | Minimum Specified Concentrated Load, kN |
Roof surfaces | 1.3 |
Floors of classrooms | 4.5 |
Floors of offices, manufacturing buildings, hospital wards and stages | 9.0 |
Floors and areas used by passenger cars | 11 |
Floors and areas used by vehicles not exceeding 3600 kg gross weight | 18 |
Floors and areas used by vehicles exceeding 3600 kg but not exceeding 9000 kg gross weight | 36 |
Floors and areas used by vehicles exceeding 9000 kg gross weight | 54 |
Driveways and sidewalks over areaways and basements | 54 |
4.1.5.11. — Sway Forces in Assembly Occupancies
(1) The floor assembly and other structural elements that support fixed seats in any building used for assembly occupancies accommodating large numbers of people at one time, such as grandstands, stadia and theatre balconies, shall be designed to resist a horizontal force equal to not less than 0.3 kN for each metre length of seats acting parallel to each row of seats, and not less then 0.15 kN for each metre length of seats acting at right angles to each row of seats, based on the assumption that these forces are acting independently of each other.
Text · e-Laws consolidated snapshot
4.1.5.12. — Crane-Supporting Structures and Impact of Machinery and Equipment
(1) The minimum specified load due to equipment, machinery or other objects that may produce impact shall be the sum of the weight of the equipment or machinery and its maximum lifting capacity, multiplied by an appropriate factor listed in Table 4.1.5.12.
(2) Crane runway structures shall be designed to resist a horizontal force applied normal to the top of the rails equal to not less than 20% of the sum of the weights of the lifted load and the crane trolley, excluding other parts of the crane.
(3) The force described in Sentence (2) shall be equally distributed on each side of the runway and shall be assumed to act in either direction.
(4) Crane runway structures shall be designed to resist a horizontal force applied parallel to the top of the rails equal to not less than 10% of the maximum wheel loads of the crane.
Editor's note
In the notes to Table-4.1.5.12., the footnote reference numbers are presented inline with a separating space; the e-Laws consolidation renders them as superscript abutting the text. The footnote text is identical.
Text · e-Laws consolidated snapshot
Column 1 | Column 2 |
Cause of Impact | Factor |
Operation of cab or radio-operated cranes | 1.25 |
Operation of pendant or hand-operated cranes | 1.10 |
Operation of elevators | (1) |
Supports for light machinery, shaft or motor-driven | 1.20 |
Supports for reciprocating machinery (e.g. compressors) | 1.50 |
Supports for power-driven units (e.g. piston engines) | 1.50 |
Notes to Table 4.1.5.12.:
(1)See CSA B44, “Safety Code for Elevators.”
4.1.5.13. — Bleachers
(1) Bleacher seats shall be designed for a uniformly distributed live load of 1.75 kN for each linear metre or for a concentrated load of 2.2 kN distributed over a length of 750 mm, whichever produces the most critical effect on the supporting members.
(2) Bleachers shall be checked by the erector after erection to ensure that all structural members, including bracing specified in the design, have been installed.
(3) Telescopic bleachers shall be provided with locking devices to ensure stability while in use.
Text · e-Laws consolidated snapshot
4.1.5.14. — Helicopter Landing Areas
(1) Helicopter landing areas on roofs shall be constructed in conformance with the requirements contained in “Canadian Aviation Regulations – Part III”, published by Transport Canada.
Text · e-Laws consolidated snapshot
4.1.5.15. — Loads on Guards
(1) The minimum specified horizontal load applied inward or outward at the top of every required guard shall be,
(a) 3.0 kN/m for means of egress in grandstands, stadia, bleachers and arenas,
(b) a concentrated load of 1.0 kN applied at any point for access ways to equipment platforms, contiguous stairs and similar areas where the gathering of many people is improbable, and
(c) 0.75 kN/m or a concentrated load of 1.0 kN applied at any point, whichever governs for locations other than those described in Clauses (a) and (b).
(2) Individual elements within the guard, including solid panels and pickets, shall be designed for a load of 0.5 kN applied over an area of 100 mm by 100 mm located at any point in the element or elements so as to produce the most critical effect.
(3) The loads required in Sentence (2) need not be considered to act simultaneously with the loads provided for in Sentences (1) and (4).
(4) The minimum specified load applied vertically at the top of every required guard shall be 15 kN/m and need not be considered to act simultaneously with the horizontal load provided for in Sentence (1).
(5) For loads on handrails, refer to Sentence 3.4.6.4.(9).
Text · e-Laws consolidated snapshot
4.1.5.16. — Loads on Vehicle Guardrails
(1) Vehicle guardrails for storage garages shall be designed for a concentrated load of 22 kN applied horizontally outward at any point 500 mm above the floor surface.
Text · e-Laws consolidated snapshot
4.1.5.17. — Loads on Walls Acting As Guards
(1) Where the floor elevation on one side of a wall, including a wall around a shaft, is more than 600 mm higher than the elevation of the floor or ground on the other side, the wall shall be designed to resist the appropriate lateral design loads prescribed elsewhere in this Section or 0.5 kPa, whichever produces the more critical effect.
Text · e-Laws consolidated snapshot
4.1.5.18. — Firewalls
(1) Firewalls shall be designed to resist the maximum effect due to,
(a) the appropriate lateral design loads prescribed elsewhere in this Section, or
(b) a factored lateral load of 0.5 kPa under fire conditions, as described in Sentence (2).
(2) Under fire conditions, where the fire-resistance rating of the structure is less than that of the firewall,
(a) lateral support shall be assumed to be provided by the structure on one side only, or
(b) another structural support system capable of resisting the loads imposed by a fire on either side of the firewall shall be provided.
Text · e-Laws consolidated snapshot
Provenance
OBC 1997 · renumbered from 4.1.6. — Pro
Base · O. Reg. 350/06 · ext← current
Original — base regulation
OBC 2012 · continues as 4.1.5. — Pro