ISOCEL.CA

Calculation tools for structural engineers

Available calculation tools - NBC

Equivalent static force method
2010
Snow load (typical)
2010
Climatic data
2005-2020

Modifications history

v0.1 (20240627)

Wind pressures with return period of 1/50 years were inverted with those of 1/10 years in the table.

v0.0 (20240507)

First beta version

Disclaimers and others

0.x Versions (beta): The Calculations tools in version 0.x are still in development and should be used with caution. No in-depth quality-control have been done on those versions. Don't hesitate to participate in the Quality Assurance process and report any bug or error you find.

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Climatic data - NBC2005-2020

v0.1 (20240627)

Project

N^o

Prepared by

Client

Verified by

Subject

Date 2026-01-21

Site location

City / Site :

Province / Territory :

Latitude (°) : 45.5032

Longitude (°) : -73.5698

Montreal, Urban agglomeration of Montreal, Montreal (administrative region), Quebec, Canada

Seismic hazard values (NBC 2020)

Site designation : Vs₃₀ (X_V) Site class (X_S)

NBC 2020 - Seismic hazard values (g) for a probability of p in 50 years

p	Sa(0.2)	Sa(0.5)	Sa(1.0)	Sa(2.0)	Sa(4.0)	Sa(5.0)	Sa(10.0)	pga
2%	0.84	0.49	0.257	0.116	0.0418	0.0301	0.00969	0.46
5%	0.483	0.278	0.14	0.062	0.0217	0.0155	0.00506	0.27
10%	0.3	0.173	0.0852	0.0369	0.0125	0.00882	0.00291	0.168

The values of Sa(4.0) are log-log interpolation between Sa(2.0) and Sa(5.0)

Climatic data

			Montréal (Hôtel de ville)	Outremont	Saint-Lambert	Verdun	Saint-Laurent
Distance		km	2.38	4.335	5.452	5.916	7.817
Latitude		°	45.5	45.52	45.5	45.45	45.5
Longitude		°	-73.6	-73.62	-73.5	-73.57	-73.67
CNB2020	S_{s, 1/50}	kPa	2.6	2.8	2.5	2.5	2.5
	S_{r, 1/50}	kPa	0.4	0.4	0.4	0.4	0.4
	q_1/50	kPa	0.44	0.44	0.44	0.44	0.44
	q_1/10	kPa	0.34	0.34	0.34	0.34	0.34
CNB2015	S_{s, 1/50}	kPa	2.6	2.8	2.5	2.5	2.5
	S_{r, 1/50}	kPa	0.4	0.4	0.4	0.4	0.4
	q_1/50	kPa	0.42	0.42	0.42	0.42	0.42
	q_1/10	kPa	0.33	0.33	0.33	0.33	0.33
CNB2010	S_{s, 1/50}	kPa	2.6	2.8	2.5	2.5	2.5
	S_{r, 1/50}	kPa	0.4	0.4	0.4	0.4	0.4
	q_1/50	kPa	0.42	0.42	0.42	0.42	0.42
	q_1/10	kPa	0.33	0.33	0.33	0.33	0.33
CNB2005	S_{s, 1/50}	kPa	2.6	2.8	2.5	2.5	2.5
	S_{r, 1/50}	kPa	0.4	0.4	0.4	0.4	0.4
	S_{s, 1/30}	kPa	2.4	2.6	2.3	2.3	2.3
	S_{r, 1/30}	kPa	0.4	0.4	0.4	0.4	0.4
	q_1/50	kPa	0.4	0.4	0.4	0.4	0.4

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