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BASEBALL NETTING SPECIFICATION(#42)
Baseball netting best applied to maximum abuse, abrasion and impact shall be fabricated from a minimum of #42 nylon fiber, 1 ¾” square mesh, weather treated in green or black knotted netting, with a minimum break strength of 354 pounds per strand.
All netting shall be bound with a rope border. Hardware, including “S” hooks or snaps, shall be installed as requested.
BASEBALL NETTING SPECIFICATION(#36)
Baseball netting best applied to maximum abuse, abrasion and impact shall be fabricated from a minimum of #36 nylon fiber, 1 ¾” square mesh, weather treated in black knotted netting, with a break test of 203 lbs pounds per strand.
All netting to be bound on all sides with 5/16” braided poly rope.
| Breaking Tenacity | 5.9 to 9.5 Grams/Denier |
| Stretch Elongation at Break Point | 15% to 78% |
| Elastic Recovery | 99% at 2%, 88% at 5% |
| Specific Gravity | 1.14 |
| Moisture Absorbency | Excellent Resistance |
| Abrasion Resistance | Excellent Resistance |
| Effect of Heat | Yellow at 300ºF, Melts at 482ºF |
| Effects of Age | None |
| Effects of Sunlight | Loses strength after prolonged exposure |
| Effects of Acids | Good resistance; dissolves in sulfuric acid |
| Effect of Alkalis | Inert |
| Effect of Organic Solvents | Resistant; soluble in phenolic acid |
| Resistance to Moths | Not attacked |
| Resistance to Mildew | Not attacked |
| Identification | Melts before burning; forms hard bead; celery odor |
| Feet per Pound | 579 feet |
BATMAT
 | |
| Fabric | vinyl Coated Polyester |
| Denier | 1000 13X12 per inch |
| Grab Tensile | 300 lbs./inch ASTM D 1682 |
| Tear | 85 lbs. Warp 80 lbs. Fill ASTM D 2261 |
| Stretch | 4% at 27 lbs./inch ASTM D 1682 |
| Set | 2 % ASTM D 1682 |
| Colorfast | QUV 400 hrs. no color loss Weatherometer-1500hrs. no color loss |
| Weight | 13.5 oz/sq.yd |
| Shade Factor | 60% Ashrae Standard 74-73 |
| Flame Spread | 24 ASTM E84 |
SCREENGARD
1.0 Scope
| 1.1 | This purchase requirement is for a premium type high tenacity vinyl coated polyester fabric. |
| 1.2 | The fabrication of windscreen panels shall be in accordance with the drawings and/or as described elsewhere in this specification. |
2.0 Special Requirements
| 2.1 | Windscreen panels shall be ScreenGard or an approved equal evidencing a minimum of ten years of satisfactory field performance experience. |
3.0 Materials
| 3.1 | Fabric: The fabric furnished shall be woven from 3.3 ounce per square yard polyester material coated after weaving with a 5.0 ounce per square yard coating of dark poly vinyl chloride coating, color shall be special green per color chip DC-61P. Tensile strength when tested per the grab method shall be 230 x 200 pounds and when tested by the strip method, shall be 200 x 140 pounds. |
| 3.2 | Coating: The weather protective coating systems shall be formulated to comply with the following minimum test performance standards: |
| Property | Test Method | Specification | |
| 3.2.1 | Water Absorption | ASTM-D-471 7 days @ 160 F |
5.0% Maximum weight gain |
| 3.2.2 | Plasticizer Extraction by Water | ASTM-D-1239 Modified 7 days @ 160 F |
6.0% Maximum weight loss |
| 3.2.3 | Wicking | Procedure: Room Temperature |
1/8" Maximum |
| 3.2.4 | Weathering | Carbon-Arc STM-D-750 2500 hours |
No appreciable change in color, no cracking or minimum crazing. |
4.0 Fabrication
| 4.1 | Hems and Seams: all hems shall be 3 ply. Windscreens 9' high shall have a center seam with internal reinforcement as above. All hems and seams are to be sewn with #7 weather and ultraviolet light high resistant dacron thread. |
| 4.2 | Grommets: Grommets shall be of brass material spaced at a maximum of 18" apart on all hems. A 9" high windscreen center seam shall have grommets as above. |