FORM RD-CL BRIDGE RATING DETAILS Revised Mar. 2017 No Straddle Two 5% Impact Annual/Routine Restriction Lanes Notes/Comments Permit Rating Factor Rating Factor Rating Factor STD. A STD. B STD. C 6-axle, 90k-99k 7-axle, 97k-99k No Straddle Two 5% Impact Special/Single Restriction Lanes Notes/Comments Permit Rating Factor Rating Factor Rating Factor P411 ** P413 ** C152b ** C174b ** C214b ** C237b ** C256b ** C200j ** OVERWEIGHT PERMIT RESTRICTIONS FOR LOCAL BRIDGES Restriction Restriction Detailed Restriction Description Bridge Check Operation Code Description Permit Permit 1 None YES YES No Restriction to cross bridge Normal Drive on the centerline between The AASHTO "Single Lane" live two lanes, in a manner that load distribution is used. This prevents any other vehicle from operation applies to all permit Straddle 2 YES YES occupying a part of either lane on vehicles when performing LFR Two Lanes either side of the permit vehicle. method or only to annual Drive in the center of a single lane permit vehicles when bridge. performing LRFR method. Maximum The impact factor is reduced YES YES 3 speed of Drive at a speed of 10 mph or less from the AASHTO impact to ① ① 10 mph 5% The overweight permit vehicle is Used when requirements for X DENIED YES YES NOT ALLOWED on this bridge restriction 1 thru 3 are not met Not allowed where there is a posted minimum speed. ① ** “N/A”, Does not apply when performing LRFR method, ref. AASHTO MBE Table 6A.4.5.4.2a-1
FORM RD-CL Revised Mar. 2017 BRIDGE RATING DETAILS Annual/Routine Permit No Restriction Straddle Two Lanes 5% Impact Notes/Comments Rating Factor Rating Factor Rating Factor STD. A STD. B STD. C 6-axle, 90k-99k 7-axle, 97k-99k Special/Single Permit No Restriction Straddle Two Lanes 5% Impact Notes/Comments Rating Factor Rating Factor Rating Factor P411 ** P413 ** C152b ** C174b ** C214b ** C237b ** C256b ** C200j ** OVERWEIGHT PERMIT RESTRICTIONS FOR LOCAL BRIDGES Restriction Code Restriction Description Permit Permit Detailed Restriction Description Bridge Check Operation 1 None YES YES No Restriction to cross bridge Normal 2 Straddle Two Lanes YES YES Drive on the centerline between two lanes, in a manner that prevents any other vehicle from occupying a part of either lane on either side of the permit vehicle. Drive in the center of a single lane bridge. The AASHTO "Single Lane" live load distribution is used. This operation applies to all permit vehicles when performing LFR method or only to annual permit vehicles when performing LRFR method. 3 Maximum speed of 10 mph YES ① YES ① Drive at a speed of 10 mph or less The impact factor is reduced from the AASHTO impact to 5% X DENIED YES YES The overweight permit vehicle is NOT ALLOWED on this bridge Used when requirements for restriction 1 thru 3 are not met ① Not allowed where there is a posted minimum speed. ** “N/A”, Does not apply when performing LRFR method, ref. AASHTO MBE Table 6A.4.5.4.2a-1