4.1.6.12.Valleys in Curved or Sloped Roofs

(1) For valleys in curved or sloped roofs with a slope α > 10°, in addition to the full and partial load cases defined in Article 4.1.6.3., the non-uniform load Cases II and III presented in Sentences (2) and (3) shall be considered to account for sliding, creeping and movement of meltwater. (2) For Case II (See Figure 4.1.6.12.), the accumulation factor, Ca, shall be calculated as follows: 1 b Ca = for 0 < x ≤ , and Cb 4 0.5 b b Ca = for < x ≤ Cb 4 2 where x = horizontal distance from the bottom of the valley, and b = twice the horizontal distance between the bottom of the valley and the peak of the roof surface in question. (3) For Case III (See Figure 4.1.6.12.), Ca shall be calculated as follows: 1.5 b Ca = for 0 < x ≤ , and Cb 8 0.5 b b Ca = for < x ≤ Cb 8 2 where x, b = as specified in Sentence (2). Figure 4.1.6.12. Snow Loads in Valleys of Sloped or Curved Roofs Forming Part of Sentences 4.1.6.12.(2) and (3) Notes to Figure 4.1.6.12.: (1) Cw = 1.0, as per Sentence 4.1.6.2.(3). (2) Cs = 1.0, as per Sentence 4.1.6.2.(7).