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Figure V-12.11: Overflow Structure <br /> 15°(tYp•) <br /> 3 see note 1 4 hook clamps event laced. <br /> /4 diameter smooth bars p Y p <br /> equally spaced(4"O.C.max.) See detail below. <br /> A� a �A <br /> Provide maintenance access by <br /> welding 4 crossbars to 4 vertical <br /> bars as shown.Hinge upper <br /> ends with flangestbolts and <br /> provide locking mechanism <br /> (padlock)on lower end.Locate <br /> Plan View steps directly below. <br /> 3/4"dia.smooth round <br /> 24" bars welded equally <br /> lower steel band 3/4'x 4" see note 1 spaced.Bars shall be <br /> welded to upper and <br /> wide formed to fit in upper steel lower bands(24 bands <br /> groove of CB riser 3 event spaced see note 1 <br /> band /4"x Y p ) <br /> 4"wide <br /> type 2 CB <br /> 45° <br /> standard galvanized <br /> steps or ladder <br /> smooth <br /> vertical bars CB riser <br /> Section A-A <br /> hook clamp <br /> anchored to <br /> C.B.riser <br /> Detail Hook Clamp <br /> Notes: <br /> 1. Dimensions are for illustration on 54"diameter CB.For different diameter CB's adjust to maintain <br /> 45 degree angle on"vertical"bars and 7"O.C.maximum spacing of bars around lower steel band. <br /> 2. Metal parts must be corrosion resistant;steel bars must be galvanized. <br /> 3. This debris barrier is also recommended for use on the inlet to roadway cross-culverts with high <br /> potential for debris collection (except on type 2 streams). NOT TO SCALE <br /> Overflow Structure <br /> Revised June 2016 <br /> DEPARTMENT OF <br /> ECOLOGY Please see http://www.ecy.wa.gov/copyrighthtml for copyright notice including permissions, <br /> State of Washington limitation of liability,and disclaimer. <br /> 2019 Stormwater Management Manual for Western Washington <br /> Volume V-Chapter 12-Page 978 <br />