{"data":{"id":"us/49-cfr-587.6","jurisdiction":"us","citation":"49 CFR 587.6","heading":"General description.","body":"(a) The moving deformable barrier consists of component parts and component assemblies which are described in drawings and specifications that are set forth in this § 587.6 of this chapter (incorporated by reference; see § 587.5).\n(b) The moving deformable barrier specifications are provided in the drawings shown in DSL-1278 through DSL-1287, except DSL-1282, and the drawing shown in DSL-1290 (DSL-1278 through DSL-1287, except for DSL-1282, and DSL-1290 are incorporated by reference; see § 587.5).\n(1) The specifications for the final assembly of the moving deformable barrier are provided in the drawings shown in DSL-1278, dated June 2002.\n(2) The specifications for the frame assembly of the moving deformable barrier are provided in the drawings shown in DSL-1281, dated August 20, 1980.\n(3) The specifications for the face of the moving deformable barrier are provided in the drawings shown in DSL-1285, dated October 1991, and DSL-1286, dated August 20, 1980.\n(4) The specifications for the ballast installation and details concerning the ballast plate are provided in drawings shown in DSL-1279 and DSL-1280, both dated August 20, 1980.\n(5) The specifications for the hub assembly and details concerning the brake are provided in drawings shown in DSL-1283, dated October 1991.\n(6) The specifications for the rear guide assembly are provided in drawings shown in DSL-1284, dated August 20, 1980.\n(7) The specifications for the research axle assembly are provided in drawings shown in DSL-1287, dated October 1991.\n(8) The specifications for the compliance axle assembly are provided in drawings shown in DSL-1290, dated October 1991.\n(c) In configuration 2 (with two cameras and camera mounts, a light trap vane, and ballast reduced), the moving deformable barrier (crabbable axle), including the impact surface, supporting structure, and carriage, weighs 3,015 pounds, has a track width of 74 inches, and has a wheelbase of 102 inches.\n(d) In configuration 2, the moving deformable barrier has the following center of gravity:\nX = 44.2 inches rear of front axle\nY = 0.3 inches left of longitudinal center line\nZ = 19.7 inches from ground.\n(e) The moving deformable barrier has the following moment of inertia:\nPitch = 1669 ft-lb-sec 2\nRoll = 375 ft-lb-sec 2\nYaw = 1897 ft-lb-sec 2","path":["Title 49—Transportation","Subtitle B—Other Regulations Relating to Transportation","CHAPTER V—NATIONAL HIGHWAY TRAFFIC SAFETY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION","PART 587—DEFORMABLE BARRIERS","Subpart B—Side Impact Moving Deformable Barrier"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-49.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:26:34Z","sha256":"36e1d32214b8378a08f9a90eddcb1cac61523e147a01f9307d320303e5c6079e","source_id":"us-cfr","stale":true,"prev":"us/49-cfr-587.5","next":"us/49-cfr-587.7-587.10"},"notice":"GroundRules: Original legal text. Not legal advice."}