732.01 Description. This item shall consist of constructing a
foundation pad including excavation and/or embankme nt, transitions from bridge ends, and a backup wall, when specified , and furnishing and installing a crash cushion according to these s pecifications and to the dimensions and at the locations shown on the plans or as directed. The crash cushion shall satisfy the Nati onal Cooperative Highway Research Program (NCHRP) Report 350 or the Manual for Assessing Safety Hardware (MASH) requirements for a test level 3 (TL-3) crash cushion.
732.02 Materials. (a) Foundation Pad and Backup Wal l.
1.Concrete shall comply with Section 802 for Class M concrete. The Department will perform all acceptance sampling and testing at the frequencies shown for Contractor acceptance tes ting in Subsection 802.06.
2.Reinforcing steel shall comply with Section 804.
3.Preformed joint filler shall comply with AASHTO M 1 53, Type I.
b.Crash Cushion. The Contractor shall furnish a certification from the manufacturer or supplier that the crash cu shion meets the requirements of NCHRP Report 350 or MASH for a TL-3 crash cushion. The crash cushion shall comply with the m ost current specifications and details for a guardrail energy a bsorbing terminal crash cushion as recommended by the manufacturer an d as approved by the Engineer. The Contractor shall provide the Engineer with copi es of all necessary manufacturer’s details and installation m anuals prior to the installation of the crash cushion on the projec t. These materials shall remain the property of the Department.
732.03 Construction Requirements. The subgrade area for the
foundation pad shall be shaped and compacted to the required section. Compaction shall be accomplished by any m ethod satisfactory to the Engineer. The foundation pad, including curb transition from bridge ends, and backup wall shall be constructed to the lines a nd dimensions shown on the plans. The backup wall shall also be constructed according to Section 631. The crash cushion shall be installed according to t he manufacturer's current recommendations and installa tion methods.
732.04 Method of Measurement. Crash Cushions will be
measured by the unit. Each unit shall include one crash cushion and foundation pad with curb transitions, when specifie d. Backup Wall will be measured by the linear foot (me ter).
732.05 Basis of Payment. Work completed and accepted and
measured as provided above will be paid for at the contract unit price bid per each for Crash Cushion or per linear foot (meter) for Backup Wall, when specified, which price shall be f ull compensation for excavation and/or embankment; for construction of the foundation pad, with curb transitions when s pecified; for furnishing and installing the crash cushion; for co nstruction of the backup wall, when specified; and for all materials, labor, equipment, tools, and incidentals necessary to complete the wo rk. Payment will be made under: Pay Item Pay Unit Crash Cushion Each Backup Wall Linear Foot (Meter)
Source: , Edition.