Roof geometry

Roof slope

Roof slope is defined in the dialogue in degrees and used for calculation of the shape coefficients.

Shape coefficients

Snow shape coefficients are calcualted according roof slope.

Angle of pitch of roof α	0° ≤ α ≤ 30°	30° ≤ α ≤ 60°	α ≥ 60°
μ₁	0,8	0,8•(60 - α)/30	0,0
μ₂	0,8 + 0,8•α/30	1,6	--

Characteristic value of snow load on the ground

This value depend on the selected national annex, Clause 4.1(1). More information can be found on the National annex page.

Coefficients

Exposure coefficient

This value depend on the selected national annex, Clause 5.2(7). More information can be found on the National annex page.

Table 5.1 Recommended standard values of C_e for different tophographies

Topography	C_e
Windswept^a	0,8
Normal^b	1,0
Sheltered^c	1,2
^a Windswept topography: flat unobstructed areas exposed on all sides without, or little shelter afforded by terrain, higher construction works or trees. ^b Normal topography: areas where there is no significant removal of snow by wind on construction work, because of terrain, other construction works or trees. ^c Sheltered topography: areas in which the construction work being considered is considerably lower than the surrounding terrain or surrounded by high trees and/or surrounded by higher construction works.

Thermal coefficient

This value depend on the selected national annex, Clause 5.2(8). More information can be found on the National annex page.

Recommended value: C_t = 1.0

Explanation of symbols

Name: Coefficients for the snow load
Rating: 5 (1 reviews)

C_e - Exposure coefficient

C_esl - Exceptional load coefficient

C_t - Thermal coefficient

s_k - Characteristic value of snow load on the ground [kN/m²]

α - Roof slope [°]

μ₁ - Shape coefficient

μ₂ - Shape coefficient