"Snow Drift on a Roof, Abutting a Taller Construction<hr/><small>According to <strong>Eurocode</strong>: EN 1991-1-3, § 5.3.6</small>
'<div style="max-width:180mm">
'<img class="side" style="width:210pt;" src="https://calcpad.eu/media/structures/loads/snow-drift.png" alt="snow-drift.png">
'Characteristic snow load on the ground -'s_k = ?'kN/m<sup>2</sup>
'Higher roof width -'b_1 = ?'m
'Sliding surface width -'b_s = ?'m
'Lower roof width -'b_2 = ?'m
'height difference -'h = ?'m
'Pitch angle of the higher roof -'α = ?'<sup>o</sup>
#post
'Shape coefficient for the higher roof
#if α ≤ 15
	μ_1h = 0'(α &le; 15 <sup>o</sup>)
#else
	#if α ≤ 30
		μ_1h = 0.8'(15<sup>o</sup> &lt; α &le; 30<sup>o</sup>)
	#else if α < 60
		μ_1h = 0.8*(60 - α)/30'(30<sup>o</sup> &lt; α &lt; 60<sup>o</sup>)
	#else
		μ_1h = 0'(α &ge; 60<sup>o</sup>)
	#end if
#end if
'Drift length
'<p class="ref">(5.9) from EN 1991-1-3</p>
l_s = max(5; min(2*h;15))'m
'Shape coefficient due to sliding
'<p class="ref">EN 1991-1-3, § 5.3.6 (1)</p>
μ_s = μ_1h * b_s / l_s
'Shape coefficient due to wind
'<p class="ref">(5.8) from EN 1991-1-3</p>
μ_w_ = min((b_1 + b_2)/(2*h); 2*h/s_k)
μ_w = max(0.8; min(μ_w_;4))
'Shape coefficient for snow load
'<p class="ref">(5.6) from EN 1991-1-3</p>
μ_1 = 0.8
'<p class="ref">(5.7) from EN 1991-1-3</p>
μ_2 = μ_s + μ_w 
#if b_2 < l_s
	'Shape coefficient for the edge of the lower roof
	μ_12 = (μ_1 - μ_2)*b_2/l_s + μ_2
#end if
#show
'</div>1.5	18	9	36	6.2	3