4-Foot Flared Trend Terminal

Description: The 4F-T™ has a System length of 34' 4-1/2” [10.48 m], measured from the center of post one to the first (1st) splice location behind post nine. The 4F-T™ is to be installed at a height of 31” [787 mm] with a tolerance of +1” [25 mm], -0”, measured from finished grade to top of rail. The impact head extends forward of the center of Post 1 by 10-3/4” [27.31 mm] and the system is flared, away from traffic, 4' [1.22 m] over its system length - relative to the downstream guardrail. The 4F-T™ consist of one (1) Impact Head, one (1) Formed Ground Strut, one (1) Tension Cable, one (1) Hinged Breakaway Post (“HBA®”) at Post 1 location (nominally embedded 6' 2-1/2” [ 1.89 m]), eight (8) Steel Yielding Terminal Posts (“SYTP®”) at post locations two through nine (nominally embedded 3' 4” [1.01 m]), special Steel Spacer Blocks, Backing Plates and various other fastener and hardware components. Posts in position one through three utilize below-grade soil plates on the downstream side of the posts, for increased soil bearing resistance. Additionally, the System includes ten (10) proprietary 10ga W-Beam guardrail panels, of which eight (8) are slotted, one (1) is a Transition Panel (used at the downstream end of the System to attach to MGS) and one (1) is a welded Head Attachment Rail Panel. All nine (9) posts utilize a special Steel Spacer Block, one (1) of those special Steel Spacer Blocks (at post 2) provide a method to anchor the Tension Cable to the System. The special Steel Spacer Blocks add a 3” [76 mm] space from the face of each post to the back of each system panel. Backing plates are utilized at post locations two through nine. All components of the 4F-T™ are galvanized and are specifically designed to be “universal”, allowing the same set of components to be assembled on either side of the roadway, as well as utilized in trailing/departure end applications. System installation height, as tested, was 31” [787 mm] with a tolerance of +1” [25 mm], -0”.

Test Level: 3

Eligibility Letter: CC-181

System Type: W-Beam Guardrail Terminal

MASH Test Number: 3-30, 3-31, 3-32, 3-33, 3-34, 3-35, 3-37b

Proprietary/Non-proprietary: Proprietary

Pass/Fail: Pass

Evaluation: Full-Scale Crash Testing

Sponsor: Valtir LLC