Knife River Bridge Section Voided Slabs · Voided Slabs Void size and con˜guration vary with...

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P.O. Box 181Harrisburg, Oregon 97446

Phone (541) 995-6327Fax (541) 995-9447

Knife River Bridge Section

Voided Slabs

Void size and con�guration vary with depth.**

12”15”

18”

26”21”

30”

www.kniferiverprestress.com **ODOT State Specs BR400 series

Estimated Span Length (ft.)

30 45 60 75 9015 (ft.)

h A bw I yb S b=S t V/S wt.

(in.) (in. 2) (in.) (in. 4) (in.) (in. 3) (in.) (plf)12S lab 12 576 48 6912 6.0 1152 4.79 60015S lab 15 569 24 12897 7.5 1720 4.51 59318S lab 18 628 18 21855 9.0 2428 4.75 65521S lab 21 703 14 34517 10.5 3287 5.09 73326S lab 26 846 16.5 63870 13.0 4913 5.71 88130S lab 30 931 12 97694 15.0 6513 5.96 970

S ection Properties (gros s )Type

AN MDU RESOURCES COMPANY

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