The sheets shall be sufficiently robust to withstand the normal handling during assembly on coaches. The sheets shall not crack or fracture when worked by ordinary wood working tools or machinery.
The sheets shall be weatherproof and shall not loose shape or rot in service. They shall also withstand attack by vermin. The sheets shall not wrap, specially delaminate or blister. Expansion or contraction due to thermal changes may be negligible.
The sheets shall have one paintable surface specially prepared for apply the white paint and shall be suitable to receive ready mixed paints, Cellulose lacquer and natural or synthetic enamel.
Unless otherwise specified the thickness of sheets shall be 1.5 +0.3 /- 0m. The length and width of the sheets shall be as agreed to between purchaser and the manufacturer. The tolerances shall be ± 10mm for length and width. The out of squareness of the sheets shall not exceed 10mm/1500mm length.
The physical properties of sheets shall conform to the requirements indicated in this table
| Sl No. | Property | Required Value | Method of Test |
|---|---|---|---|
| 1 | Density (gm/cm3) | 1.5 ± 0.2 | Appendix A |
| 2 | Tensile strength (MPa) Min. both along the length and width | 25.0 | Appendix B |
| 3 | Breaking strength (Kg) Min. both along the length and width | 10.0 | Appendix C |
| 4 | Drop Impact Test | To pass | Appendix D |
| 5 | Flexibility | To pass | Appendix E |
| 6 | Water Absorption (%) Max. | 5.0 | Buoyancy method or Appendix F |
| 7 | Fire Worthiness Properties | ||
| a | Resistance to Spread of flame | Class A | Appendix – 11 of UIC 564-2 OR |
| b | Limiting Oxygen Index | Min. 35 | IS: 13360 Part-6,Section-19 |
| c | Deterioration of visibility due to smoke | Class A | Appendix – 15 of UIC 564-2 OR |
| d | Toxicity | < 1 | NCD : 1409 |
| e | Heat Release Rate (MARHE i.e. Maximum Average Rate of Heat Emission in KW/m2) as specified in EN 45545-2 : 2013 |
R1 (HL3) | ISO 5660-1 :50 KW/m2 |
Board 5 to 15 mm thickness with 1200 x 1520 sizes
The physical properties of sheets shall conform to the requirements indicated in this table
| Sl No. | Property | Required Value | Method of Test |
|---|---|---|---|
| 1 | Density (gm/cm3) | 1.5 ± 0.1 | Appendix A |
| 2 | Tensile strength (MPa) Min. both along the length and width | 50 | Appendix B |
| 3 | Breaking strength (Kg) Min. both along the length and width | 15 | Appendix C |
| 4 | Drop Impact Test | To pass | Appendix D |
| 5 | Flexibility | To pass | Appendix E |
| 6 | Water Absorption (%) Max. | 3.0 | Buoyancy method or Appendix F |
| 7 | Fire Worthiness Properties | ||
| a | Resistance to Spread of flame | Class A | Appendix – 4 of UIC-564-2 OR |
| b | Deterioration of Visibility due to Smoke - Min. | Class A | Appendix – 15 of UIC-564-2 OR |
| c | Limiting Oxygen Index – Min. | 35 | IS : 13360, Part : 6 |
| d | Toxicity | Less than 1.0 | NCD : 1409 |
| e | Heat Release Rate (MARHE i.e. Maximum Average Rate of Heat Emission in KW/m2) as specified in EN 45545-2 : 2013 |
R1 (HL3) | ISO 5660-1 :50 KW/m2 |
The physical properties of sheets shall conform to the requirements indicated in this table
| Sl No. | Physical Properties | Methods of Test | Required Value | |||
|---|---|---|---|---|---|---|
| 1.5 MM | 2 MM | 4 mm | 6 mm | |||
| 1 | Tensile strength (MPa) Min. both along the length and width | ASTM D-3039 | 25 | 30 | 50 | 65 |
| 2 | Breaking strength (Kg) Min. both along the length and width | ASTM | 10 | 12 | 25 | 35 |
| Chemical Properties | ||||||
| 3 | Density (gm/cm 3) | 1.5+-0.2 | 1.5+-0.2 | 1.5+-0.2 | 1.5+-0.2 | |
| 4 | Water Absorption (%) Max. | ASTM D-570 | 5 | 5 | 5 | 5 |
| Fire Worthiness | ||||||
| 5 | Resistance to spread of flame – Min | Appendix – 11 of UIC564-2 OR | Class A | Class A | Class A | Class A |
| 6 | Deterioration of visibility due to smoke (Min) | Appendix – 11 of UIC564-2 OR | Class A | Class A | Class A | Class A |
| 7 | Limiting Oxygen Index – Min | IS:13360 Pt-6 Sec-19: 2001 | 35 | 35 | 35 | 35 |
| 8 | Toxicity | NCD – 1409 | Less than 1 | Less than 1 | Less than 1 | Less than 1 |
| 9 | Heat Release Rate (MARHE i.e. Maximum Average Rate of Heat Emission in KW/m2) as specified in EN 45545-2 : 2013 | ISO 5660-1 50KW/m2 | R1(HL3) | R1(HL3) | R1(HL3) | R1(HL3) |