- 957 - SECTION 1074 -- GABIONS AND REVET MATTRESSES
1074.01 Description
1.Gabions and revet mattresses are generally used for erosion and earth control.
1074.02 Material Characteristics
1.Wire coatings shall be as described in the contract.
2.The size of the stone for gabions shall be 4 inches to 8 inches (100 mm to 200 mm) in diameter. The size of the stone for revet mattresses shall be 3 inches to 6 inches (75 mm to 150 mm) in diameter. The maximum length of stone shall not exceed 16 inches (400 mm). The maximum weight for any one stone shall not exceed 6.0 pounds (2.7 kg).
3.Approved stone is defined as that meeting the requirements of Paragraphs 1., 3., and 4. of Subsection 905.02.
1074.03 Acceptance Requirements
1.Acceptable gabions and revet mattresses are shown on the Department’s Approved Products List. - 958 - SECTION 1075 -- TIMBER AND LUMBER
1075.01 Description
1.Timber and lumber shall cons ist of treated and untreated wood of the kinds, qualities, grades, and sizes shown in the contract.
2.Kinds of Wood -- Unless ot herwise provided, all treated or untreated timber and lumber shall be cut from live sound Douglas Fir trees from the Coast Region or Southern Yellow Pine.
3.General Requirements -- All timber and lumber, treated or untreated, shall be of the grade called fo r in the contract documents or these Specifications.
4.Definitions of Terms -- The terms used in these Specifications shall be interpreted in accordance with ASTM D 9, supplemented by the following:
a.Full Sawn Timber Lumber -- When timber and lumber are specified as "nominal" or "full sawn", it shall mean that the material may be sawn oversize to the tolerances shown below, but may not be undersize at the time of manufacture. Time of manu facture is defined as "timber in the green condition as cut and received from the lumber mill".
1.For 2 inches (50 mm) thickness timber and lumber, 1/4 inch (6 mm) oversize.
2.For 3 inch to 7 inch (75 mm to 175 mm) thickness timber and lumber, 3/8 inch (9 mm) oversize.
3.For 8 inch (200 mm) or mo re thickness timber and lumber, ½ inch (12.5 mm) oversize.
4.For 4 inch to 7 inch (100 mm to 175 mm) wide timber and lumber, 3/8 inch (9 mm) oversize.
5.For 8 inch (200 mm) or more wide timber and lumber, 1/2 inch (12.5 mm) oversize.
b.Stress Grades -- Timber and lumber grades having assigned working stress and modulus of elasticity values in accordance with accepted basic principles of strength grading.
c.Trim -- Trimming of timber and lumber is the act of cross cutting a piece to a given length.
1.Double end trimmed (DET) timber and lumber is trimmed reasonably square by a saw on both ends.
2.Precision end trimmed (PET) timber and lumber is trimmed square and smooth on both ends to uniform lengths with a manufacturing tolerance of 1/16 inch (1.5 mm) over or under in length in 20% of the pieces.
3.Square end trimmed timber and lumber is trimmed square allowing slight manufacturing tolerance of 1/64 inch (0.5 mm) for each nominal 2 inches (50 mm) of thickness or width.
5.Nomenclature of domestic hardwoods and softwoods shall be in accordance with ASTM D 1165.
Source: Nebraska Standard Specifications for Highway Construction, 2017 Edition. Pages 991–991 of 1,048.