OBC 2006 › Division B

4.1.2.1.

Version 0 — in force 31 December 2006

In force

Verified · covered Verified against the 2006-12-31–2007-04-01 consolidation, whose range covers the query date. How to read this

In force

Verified · covered Verified against the 2006-12-31–2007-04-01 consolidation, whose range covers the query date. How to read this

Provenance

OBC 1997 · continues from 4.1.2.1. — Pro

Base · O. Reg. 350/06 · ext← current

Original — base regulation

OBC 2012 · continues as 4.1.2.1. — Pro

4.1.2.1. — Loads and Effects

(1) Except as provided in Article 4.1.2.2., the categories of loads, specified loads and effects set out in Table 4.1.2.1.A. shall be taken into consideration in the design of a building and its structural members and connections.

(2) Minimum specified values of the loads described in Sentence (1), as set forth in Subsections 4.1.4. to 4.1.8., shall be increased to account for dynamic effects where applicable.

(3) For the purpose of determining specified loads S, W or E in Subsections 4.1.6. to 4.1.8., buildings shall be assigned an Importance Category based on intended use and occupancy, in accordance with Table 4.1.2.1.B.

Editor's note

In the notes to Table-4.1.2.1.A., a separating space follows the footnote reference numbers; the e-Laws consolidation omits it. The footnote text is identical.

Text · e-Laws consolidated snapshot

Table 4.1.2.1.A. Categories of Loads, Specified Loads and Effects Forming Part of Sentence 4.1.2.1.(1)

Column 1	Column 2
Symbol	Loads, Specified Loads, or Effects ⁽¹⁾
D	dead load – a permanent load ⁽²⁾ due to the weight of building components as specified in Subsection 4.1.4.
E	earthquake load and effects – a rare load ⁽⁴⁾ due to an earthquake, as specified in Subsection 4.1.8.
H	a permanent load ⁽²⁾ due to lateral earth pressure, including groundwater
L	live load – a variable load ⁽³⁾ due to intended use and occupancy (including loads due to cranes and the pressure of liquids in containers), as specified in Subsection 4.1.5.
P	permanent effects caused by prestress
S	variable load ⁽³⁾ due to snow including ice and associated rain, as specified in Article 4.1.6.2., or due to rain, as specified in Article 4.1.6.4.
T	effects due to contraction, expansion, or deflection caused by temperature changes, shrinkage, moisture changes, creep, ground settlement, or a combination of them
W	wind load – a variable load ⁽³⁾ due to wind, as specified in Subsection 4.1.7.

Notes to Table 4.1.2.1.A.:

⁽¹⁾load means the imposed deformations (i.e. deflections, displacements or motions that induce deformations and forces in the structure), forces and pressures applied to the building structure,

⁽²⁾permanent load is a load that changes very little once it has been applied to the structure, except during repair,

⁽³⁾variable load is a load that frequently changes in magnitude, direction or location, and

⁽⁴⁾rare load is a load that occurs infrequently and for a short time only.

Table 4.1.2.1.B. Importance Categories for Buildings Forming Part of Sentence 4.1.2.1.(3)

Column 1	Column 2
Use and Occupancy	Importance Category
Buildings that represent a low direct or indirect hazard to human life in the event of failure, including:
• low human-occupancy buildings, where it can be shown that collapse is not likely to cause injury or other serious consequences	Low
• minor storage buildings
All buildings except those listed in Importance Categories Low, High and Post-disaster	Normal
Buildings that are likely to be used as post-disaster shelters, including buildings whose primary use is:
• as an elementary, middle or secondary school	High
• as a community centre
Manufacturing and storage facilities containing toxic, explosive or other hazardous substances in sufficient quantities to be dangerous to the public if released
Post-disaster buildings	Post-disaster