El generador de carga SkyCiv utiliza valores digitalizados de las siguientes figuras para calcular la \( C_{p} C_{g} \) en el cálculo de las presiones del viento de diseño para componentes estructurales y revestimientos:
Figura 4.1.7.6.-B – External peak values of \( C_{p} C_{g} \) on individual walls for the design of cladding and secondary structural members;
Figura 4.1.7.6.-C – External peak values of \( C_{p} C_{g} \) on roofs with a slope of 7° or less for the design of structural components and cladding;
Figura 4.1.7.6.-E – External peak values of \( C_{p} C_{g} \) on single-span gabled and hipped roofs with a slope greater than 7° for the design of structural components and cladding; y
Figura 4.1.7.6.-G – External peak values of \( C_{p} C_{g} \) on monoslope roofs for the design of structural components and cladding.
The process is done by usingEngauge Digitizer, as the exact values in the graphs are not explicitly shown or stated in the code reference. With this, for transparency, the following data are being used in the Load Generator – Cálculos de carga de viento utilizando NBCC 2015 y 2020. The adopted values are rounded to the nearest tenths (higher magnitude). Values in between known points are interpolated linearly using log-scale for the area axis.
Figura 4.1.7.6.-B – \( C_{p} C_{g} \) on individual walls for the design of cladding and secondary structural members
Zona
Area, m2.
\( C_{p}C_{g}\)
\(e ^{-}\)
≤ 1
-2.1
≥ 50
-1.5
\(w^{-}\)
≤ 1
-1.8
≥ 50
-1.5
\(e ^{+}\) y \(w^{+}\)
≤ 1
1.8
≥ 50
1.3
Figura 4.1.7.6.-C – \( C_{p} C_{g} \) on roofs with a slope of 7° or less for the design of structural components and cladding
Zona
Area, m2.
\( C_{p} C_{g} \)
\(s^{-}\)
≤ 7.128
-2.5
≥ 10
-2.0
\(r^{-}\)
≤ 1
-1.8
≥ 10
-1.5
\(c^{-}\)
≤ 1
-5.4
≥ 10
-2.0
\(oc^{-}\)
≤ 1
-5.4
≥ 10
-1.5
\(os^{-}\)
≤ 1
-3.2
10
-3.0
≥ 50
-2.0
\(or^{-}\)
≤ 1
-3.2
10
-3.0
≥ 50
-2.0
\(s^{+}\), \(r^{+}\), y \(c^{+}\)
≤ 1
0.5
≥ 10
0.33
Figura 4.1.7.6.-E – \( C_{p} C_{g} \) on roofs with a slope of \( 7° \lt \alpha \leq 27° \)
Zona
Area, m2.
\( C_{p} C_{g} \)
\(s^{-}\)
≤ 2.2
-3.6
≥ 10
-2.6
\(r^{-}\)
≤ 0.9
-2.5
≥ 8.9
-2.05
\(c^{-}\)
≤ 1.1
-5.0
≥ 10.8
-4.0
\(oc^{-}\)
≤ 1.1
-7.0
≥ 11.1
-4.7
\(os^{-}\)
≤ 1
-4.1
≥ 10
-4.1
\(or^{-}\)
≤ 1
-1.6
≥ 10
-1.6
\(s^{+}\), \(r^{+}\), y \(c^{+}\)
≤ 1.2
0.8
≥ 7.94
0.5
Figura 4.1.7.6.-E – \( C_{p} C_{g} \) on roofs with a slope of \( 27° \lt \alpha \leq 45° \)
Zona
Area, m2.
\( C_{p} C_{g} \)
\(s^{-}\)
≤ 0.75
-2.1
≥ 7.95
-1.9
\(r^{-}\)
≤ 1.26
-1.8
≥ 12.6
-1.5
\(c^{-}\)
≤ 0.75
-2.1
≥ 7.95
-1.9
\(oc^{-}\)
≤ 1
-3.8
≥ 10.9
-3.3
\(os^{-}\)
≤ 1
-3.8
≥ 10.9
-3.3
\(or^{-}\)
≤ 1
-1.8
≥ 10
-1.8
\(s^{+}\), \(r^{+}\), y \(c^{+}\)
≤ 0.8
1.6
≥ 7
1.5
Figura 4.1.7.6.-G – \( C_{p} C_{g} \) on roofs with a slope of \( 3° \lt \alpha \leq 10° \) Monoslope Roof
Zona
Area, m2.
\( C_{p} C_{g} \)
\(s^{-}\)
≤ 2
-2.5
≥ 11
-2.4
\(r^{-}\)
≤ 1
-2.0
≥ 10.9
-2.0
\(c^{-}\)
≤ 1.2
-3.4
≥ 11
-2.4
s’
≤ 1.2
-3.0
≥ 12.3
-2.8
c’
≤ 0.9
-5.0
≥ 11
-3.0
\(s^{+}\), \(r^{+}\), y \(c^{+}\)
≤ 1.29
-0.6
≥ 12.3
-0.3
Figura 4.1.7.6.-G – \( C_{p} C_{g} \) on roofs with a slope of \( 10° \lt \alpha \leq 30° \) Monoslope Roof
Zona
Area, m2.
\( C_{p} C_{g} \)
\(s^{-}\)
≤ 0.83
-3,0
≥ 8.75
-2.2
\(r^{-}\)
≤ 0.92
-2.6
≥ 11
-1.95
c’
≤ 0.75
-5.5
≥ 7.5
-2.7
\(s^{+}\), \(r^{+}\), y \(c^{+}\)
≤ 1
0.9
≥ 8
0.5
Referencias:
Mark Mitchell, Baurzhan Muftakhidinov and Tobias Winchen et al, “Engauge Digitizer Software.” Webpage: http://markummitchell.github.io/engauge-digitizer, Last Accessed: julio 12, 2024
Consejo Nacional de Investigaciones de Canadá. (2015). Código Nacional de Construcción de Canadá, 2015. Consejo Nacional de Investigaciones de Canadá.
