2025-02-12_Module 02 ARC1046 Review

Module 02 ARC1046 Review

• Dead load (kPa)
  • Hollow Core
    • Do not require interpolation - use 8” as is for standard, flick back and forth
• Snow load (kPa)
  • ==S = Is [Ss (Cb Cw C s Ca ) + Sr ]== (p.1)
    • ==Is = importance factor for snow load as provided in Table 4.1.6.2.,== (p.1)
    • ==Ss = 1-in-50-year ground snow load, in kPa, determined in accordance with Subsection 1.1.2.,== (p.1)
    • ==Cb = basic roof snow load factor in Sentence (2),== (p.1)
      • Usually 0.8
      • A certain amount of snow falls down from the roof, the given snow load is for ground and needs to be factored
      • Will rise towards 1.0 if roof is very large or is internal
    • ==Cw = wind exposure factor in Sentences (3) and (4),== (p.2)
      • Usually 1.0
    • ==Cs = slope factor in Sentences (5), (6) and (7),== (p.2)
      • Usually 1.0
      • (5) Except as provided for in Sentences (6) and (7), the slope factor, Cs , shall be, (a) 1.0 where the roof slope, , is equal to or less than 30°, (b) (70° - )/40° where  is greater than 30° but not greater than 70°, and (c) 0 where  exceeds 70°. (6) The slope factor, Cs , for unobstructed slippery roofs where snow and ice can slide completely off the roof shall be, (a) 1.0 when the roof slope, , is equal to or less than 15°, (b) (60° - )/45° when  is greater than 15°, but not greater than 60°, and (c) 0 when  exceeds 60°. (7) The slope factor, Cs , shall be 1.0 when used in conjunction with shape factors for increased snow loads as given in Clauses (8)(b) and (e). (p.2)
    • ==Ca = shape factor in Sentence (8),== (p.2)
      • Usually 1.0
      • Accumulation factor
    • ==Sr = 1-in-50-year associated rain load, in kPa, determined in accordance with Subsection 1.1.2., but not greater than Ss (Cb C w Cs Ca )== (p.2)
• Ultimate Limit States
  • UDSL likely govern
  • UD = 1.4DL
  • UDL = 1.25DL + 1.5LL
  • UDS = 1.25DL + 1.5SL
  • UDLS = 1.25DL + 1.5LL + 1.0SL
  • UDSL = 1.25DL + 1.5SL + 1.0LL
  • 
  • Have to check all combinations
• Serviceability
  • Uses different SL from Importance Factor
  • Do not look for worst case, track all
  • SDL = DL + LL
  • SDS = DL + SL
  • SL = LL
  • SS = SL
• Line Load (kN/m)
  • Keep track of Serviceability (kN/m)
  • Method of Section
  • 

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Excalidraw Data

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