877 Wherever balled and burlapped material is mentioned in these Specifications, the Contractor may with the approval of the Engineer, substitute container stoc k for balled and burlapped stock of small trees and shrubs. The container grown plants shall conform to the AAN Standards. Plantable type pots can be used in lieu of burlapping balled plants; however, a firm ball must be placed in the pot, and the hole d ug with the same care and to the same size as for balled and burlapped plants. Plants with balls which have been manufactured on bare -root dug material or bare -root material that has only recently been potted will be rejected. These improperly potted plants will not be considered equal to balled and burlapped or container grown plants.
715.36 Asphaltum Base Paint for Tree Surgery :
Paint for tree wounds shall be antiseptic and w aterproof, black in color and with an asphaltic base. It shall contain no coal -tar creosote, oils, kerosene, turpentine or other material harmful to the living tissue of trees.
715.37 Miscellaneous Items for Landscape Plantings :
715.37.1 Tree Stakes: Stakes used for guying or supporting newly planted trees shall be
made from rough sawed oak, or other approved material, free from unsound or loose kno ts that impair its strength. The stakes shall be two (2) inch by two (2) inch square and of a length in proportion to the height of the tree. The following lengths for stakes shall be used as a guide: Approximate Tree Height (Feet) Stake Length (Feet) 3 to 6 5 6 to 9 6 9 to 14 7 Larger size trees shall be guyed or supported by stakes as shown on the Plans.
715.37.2 Wire: The wire used for guying and staking plants shall be galvanized steel wire,
free from bends and kinks. Trees less than three ( 3) inches in diameter shall be guyed with No. 14 gage wire, and trees three ( 3) inches and larger shall be guyed with No. 12 g age wire.
715.37.3 Hose: The hose used for staking and guying plants shall be new 3/8 to 5/8 in ch
nominal I.D. rubber garden hose or equal. The walls of the hose shall be of sufficient thickness to prevent wire damage to the plans.
715.37.4 Twine: The material used for tying wrapped tree trunks shall be binder twine
not less than two -ply strength.
715.37.5 Tree Wrap: The material shall be four (4) inch wide waterproof sisal paper
manufactured especially for wrapping trunks of tress.
715.37.6 Anti -Desiccant: Anti-desiccant shall be an emulsion which provides a protective
film over plant surfaces, permeable enough to permit transpiration. It shall be delivered in the manufacturer's containers and shall be mixed according to the manufacturer's directions. 878 715.38 -REINFORCED PLASTIC OR REINFORCED CORROSION -RESISTANT RUBBER MANHOLE STEPS :
715.38.1 General: Steps shall be composed of a steel reinforcing bar encased in plastic or
rubber, pressure -molded to the steel; steps shall have a minimum cross -sectional dimension of one ( 1) inch. Reinforcing shall be continuous through the entire length of the legs and tread. Steps shall have a depressed tread or a ½ inch minimum height cleat at tread ends, and a top surface configuration such that it will prevent or minimize slippage during ascent or decent.
715.38.2 Steel Reinforcing: Steel shall be a deformed rei nforcing bar; either No. 3, Grade
60, or No. 4, Grade 40 or 60; meeting the requirement of AASHTO M 31.
715.38.3 Plastic: Plastic shall be a grade of propylene copolymer which meets the
requirements of ASTM D4101.
715.38.4 Corrosion -Resistant Rubber : The rubber compound shall meet the physical
requirements of ASTM C443 except the durometer, Shore A, hardness shall be 70 plus or minus five.
715.38.5 Acceptance: Steps which have been evaluated by the Division and appear on the
Division's list of a pproved sources will be accepted. If the Contractor proposes to use a step not previously approved, a complete step and certified test data conforming to the above stated requirements shall be submitted for evaluation.
715.39 Ela Stomeric Gasket and Seali Ng Material :
These Specifications cover those elastomeric materials intended for use as, but not restricted to, such noncritical applications as gaskets, sealing materials, miscellaneous drainage items, etc. The elastomeric material shall meet the following requirements: Tensile Strength, minimum psi, ASTM D412 ................................ ......1,200 Elongation at Break, minimum percent, ASTM D412 ............................ 350 Shore Durometer Hardness, ASTM D2240 Minimum ................................ ................................ ........................ 35 Maximum ................................ ................................ ....................... 65 Compression Set, max percent, ASTM D395, Method B ................................ ................................ ........................ 25 Accelerated Aging, ASTM D573 (96 hr. at 70EC): Decreased Tensile Strength, maximum percent ............................. 15 Decreased Elongation, maximum percent ................................ ......20 Water Abs orption by Weight, maximum percent, ASTM D471 ............... 10
715.40 Pavement Marking Material :
This material includes all pavement marking material exclusive of White or Yellow Fast - Dry Traffic Zone Pa int (Types II or IX). Certification from the manufacturer that the material supplied meets the applicable requirements of these Specifications is required. The certification shall include the name and address of the manufacturer, the trademark or trade n ame, kind of material, reference to the Division's Specification (Subsection Number), quantities, lot number and date of manufacture. The supplier shall have equipment and qualified personnel to conduct all of the tests that are required by these specific ations.