NYC 9/11 Public Portal Document
March 6, 1985
Syska & Hennessy
New York Convention Center
Storm Sewer
References: A. Perma-Loc - PVC Sewer/Drain Pipe - Johns-Manville
B. Handbook of PVC Pipe - Design & Construction
1. Pipe: 24 in. Perma-Loc Series 46
2. Soil: Wc = 120 Ib/cu. ft
Soil type - pipe bedding material'
A - Clas-s III, GM/ GC, SM,.SC _
3^-, ■ i superioad:-’; 6Wib/sq/ft'; ' '■ ' .
■ ’ . ^Equivalent height 'ho = 6£02_lb/s£;_^ ■= 5.0 ff
- 120 Ib/cu.tt ■
4'. Pipe, cover - see sketch
.Min. hl =3.66 -ft.
Max. hl' = '6.71-ft
5.~ -Vertical_load on plastic pipe (prism load)
W ='Wc X H-+ Be Ib/ft ' , ” .
H =-\6,71 + 5.0 = l-1.71--ft, say 12.0 ft
. W -=• ’ 3067_ Ib/ft'- ■See_ _Ref. A table on page 4 -■ ' _ . -
Soil pressure P = Wc x H = 120 X 12 = 1440’ Ib/ft = 10 Ib/sq in.
6. Pipe deflection - modified "IDWA Deflection Formula" - Ref.
B, page 144, Equation No. 25:
- DX X K X P- X 100 I
D 0.149 F 4- 0.061 El I
AY -
D2 = lag factor Ref. B, table 26 '
K = bedding factor It
. El =soii stiffness 11
* F = pipe stiffness Ref. A - ■
- TTy - -
NYC-WTC_000165037
OCR can misread numbers and units. Confirm readings against the page image before using them.