FP-96 English Version - Eastern Federal Lands Highway Division

Section 254.) CRIB WALLSDescription254.01 This work consists of constructing concrete, metal, or timber cribretaining walls.Material254.02 Conform to the following Section and Subsections:Bed course 704.09Concrete 601Crib wall backfill 704.12Hardware for timber structures 716.02Metal bin type crib walls 720.03Precast concrete units 725.11Reinforcing steel 709.01Structural backfill 704.04Treated structural timber and lumber 716.03Construction Requirements254.03 General. Survey according to Section 152 and verify the limits of thewall installation. Prepare and submit installation drawings according toSubsection 104.03. Perform the work under Section 209. When the wall isset on a rocky foundation, place 8 inches of bed course under the wall baseelements.254.04 Erection. Furnish all necessary bolts, nuts, and hardware for completeassembly of the units into a continuous wall of connected units. Erectthe crib wall according to the fabricator's or manufacturer's instructions. Oncurves, obtain the proper curvature for the face by using shorter stringers in thefront or rear panels. Construct the wall to within 1 inch in 10 feet from thelines and elevations shown on the plans.(a) Concrete crib wall. Remove and replace all concrete members whichare cracked or damaged.(b) Metal crib wall. Torque bolts for metal crib walls to at least 25 footpounds.165