HomeMy WebLinkAboutSUB201500223 Calculations Road Plan and Comps. 2015-12-08 Structural Design Check for Corrugated Steel Pipe
per AISI Handbook of Steel Drainage 5th Edition, 1994
12/8/2015
Project ID and/or Name: Riverside Village
City and State Albemarle County, VA
Pipe Description
Shape: Round
Corrugation: 5 x 1
Diameter or Span (S): 72 in.
Thickness: 16 ga.
Area (A): 0.794 sq in/ft
Moment of Inertia (I): 0.00885 in^4/in
Radius of Gyration (r): 0.3657 in
Modulus of Elasticity (E): 3.00E+07 lb/sq in
Yield Strength (Fy): 33,000.0 lb/sq in
Tensile Strength (Fu): 45,000.0 lb/sq in
Safety Factors
Wall Area: 2.0
Buckling: 2.0
Loads
Dead Load
Unit Weight of Soil: 120 lb/cu ft
Height of Cover: 4 ft
Load Factor, K= 1
Pdl = 120 Ib/cu ft x 4 ft x K
Pdl = 480.0 lb/sq ft
Live Load
Load type: Special
PII = 721 lb/sq ft
Total Load
Pt = Pdl + PII
Pt= 480.0 lb/sq ft + 721.0 lb/sq ft
Pt= 1,201.0 lb/sq ft
These calculations are provided as a guidleline only by Contech Engineered Solutions. They must be
reviewed and determined to be suitable for project specific requirements by others.
'rr/ \.re
Actual Wall Stress
Ring Compression (C) = Pt x (Span/2)
C = 1,201.0 lb/sq ft x 3 ft
C = 3,603.0 lb/ft
Wall Stress (fa) =C/A
fa = 3,603.0 lb/ft / 0.794 sq in/ft
fa = 4,537.8 Ib/sq in
Find Maximum Allowable Wall Stress
S/r= 196.88 Which is < 294
Therefore,
fc = 33,000/2 lb/sq in / 2.0
fc= 16,500.0 lb/sq in
16,500.0 lb/sq in > 4,537.8 lb/sq in OK
Actual SF= 7.27
Handling and Installation Strength
Flexibility Factor(FF) = SA2/(E x I)
FF = 0.0195
Allowable FF = 0.0433
0.0433 > 0.0195 OK
These calculations are provided as a guidleline only by Contech Engineered Solutions. They must be
reviewed and determined to be suitable for project specific requirements by others.
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