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JC/T 1026-2007: Glass fiber reinforced thermosetting resin grating for supporting loads---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/JCT1026-2007JC BUILDING MATERIAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 91.060.20 Q 23 Filing No.. 20464-2007 Glass fiber reinforced thermosetting resin grating for supporting loads Issued on. APRIL 13, 2007 Implemented on. OCTOBER 01, 2007 Issued by. National Development and Reform Commission of PRC Table of ContentsForeword... 3 1 Scope... 4 2 Normative references... 4 3 Terms and definitions... 5 4 Product specifications, size and marking... 5 5 Technical requirements... 9 6 Test method... 11 7 Inspection rules... 12 8 Marking, packaging, storage, transportation... 14 Appendix A (Normative) Load-bearing capacity test of glass fiber reinforced thermosetting resin grating (3-point bending method)... 15ForewordAppendix A of this standard is a normative appendix. This standard was proposed by China Building Materials Industry Association. This standard shall under the jurisdiction of the National Fiber Reinforced Plastics Standardization Technical Committee. The main drafting organizations of this standard. Haohua Zhongyi FRP Co., Ltd., Nantong Meigu Composite Material Co., Ltd., Nantong Mingkang Composite Material Co., Ltd., Nantong Qiangli Plastic Co., Ltd., Beijing FRP Institute Composite Material Co., Ltd. The main drafters of this standard. Wang Lei, Fu Xinlan, Jiang Guitang, Yang Aiyun, Gu Jianzhong, Fang Min. This standard is issued for the first time. Glass fiber reinforced thermosetting resin grating for supporting loads1 ScopeThis standard specifies the structure, size, product model and marking, technical conditions, load-bearing requirements, inspection rules and packaging, marking, storage and transportation of glass fiber reinforced thermosetting resin grating (hereinafter referred to as grating). This standard applies to industrial platforms, floors, walkway paving, stair treads, trench covers, fences and other load-bearing gratings in petrochemical, metallurgy, light industry, shipbuilding, energy, municipal and other industries. Non-load-bearing gratings can be implemented with reference to this standard.2 Normative referencesThe provisions in following documents become the provisions of this Standard through reference in this Standard. For the dated references, the subsequent amendments (excluding corrections) or revisions do not apply to this Standard; however, parties who reach an agreement based on this Standard are encouraged to study if the latest versions of these documents are applicable. For undated references, the latest edition of the referenced document applies. GB/T 1446-2005 Fiber-reinforced plastics composites - The generals of test methods GB/T 1449-2005 Fiber-reinforced plastic composites - Determination of flexural properties GB/T 1462-2005 Test methods for water absorption of fiber reinforced plastics GB/T 3854-2005 Test method for hardness of reinforced plastics by means of Barcol impresser3 Terms and definitionsThe following terms and definitions apply to this standard. 3.1 Molded grating A board with a certain open rate made by a special process on a customized mold with thermosetting resin as the matrix and glass fiber roving as the skeleton. The product is composed of several shapes of gratings; has the characteristics of bidirectional bearing in the longitudinal and lateral directions; 3.2 Pultruded grating A board with voids made by a certain assembling process with the pultruded I and T profiles as load-bearing ribs, pipes or bars as connecting rods. The product has high strength in the direction of the load-bearing ribs; it is often used under conditions of large spans. The pultruded grating is as shown in Figure 2.4 Product specifications, size and marking4.1 Grating size 4.1.1 The grid sizes of commonly used molded gratings are as shown in Figure 3 and Table 1.The gratings of other sizes can be designed according to user requirements. 4.1.2 The commonly used pultruded grating structure is as shown in Figure 4 and Figure 5.The specifications are as shown in Table 2.The gratings of other specifications can be designed according to user requirements.5 Technical requirements5.1 Raw materials 5.1.1 Resin 5.1.1.1 The unsaturated polyester resin used in the grating shall meet the requirements of GB/T 8237-2005; the epoxy resin used shall meet the requirements of GB/T 13657-1992.Other resins shall meet the requirements of corresponding standards. 5.2 Appearance The grating shall be smooth, flat, uniform in color, free of delamination, burrs, cracks, fiber exposure or impurities. It is not allowed for pores larger than Φ3 mm. The number of pores larger than 1 mm and less than 3 mm on any 300 mm x 300 mm area of the grating plate shall not exceed 10. 5.3 Grating size deviation 5.3.1 The length and width deviation of the grating is. -3 mm ~ +3 mm for molded grating and -6 mm ~ +6 mm for pultruded grating. 5.5 Barcol hardness Barcol hardness is not less than 40. 5.6 Load-bearing capacity 5.6.1 See Table 3 for design loads. 5.6.2 For load-bearing structures such as access platforms, stairwell platforms, overhaul platforms, under the design loads listed in Table 3, the deflection at the midpoint of the grating shall not be greater than 1/120 of the span, the maximum shall not exceed 9 mm. Meanwhile it shall meet the following requirements.6 Test method6.1 Appearance 6.1.1 Use visual inspection for appearance. 6.1.2 The size of the pores on the outer surface shall be inspected with a vernier caliper which has an accuracy of 0.02 mm. 6.2 Determination of grating size 6.2.1 Divide equally into four parts along the width of the grating. Use a steel tape which has an accuracy of 1 mm to measure the length of the grating. Take the arithmetic average of the three measurement results. 6.3 Water absorption The water absorption test is carried out according to GB/T 1462-2005. 6.4 Barcol hardness Barcol hardness test is carried out according to GB/T 3854-2005. 6.5 Load-bearing capacity The load-bearing capacity test is carried out in accordance with Appendix A.7 Inspection rules7.1 Inspection category Product inspection is divided into exit-factory inspection and type inspection. 7.2 Exit-factory inspection 7.2.1 Inspection items The exit-factory grating shall be inspected for appearance, dimensional deviation and Barcol hardness. 7.2.3 Judgement rules 7.3 Type inspection 7.3.1 Inspection conditions Type inspection shall be carried out in one of the following situations. a) When the material, structure and process have obvious changes after the first production or normal production, which may affect the product performance; 7.3.2 Inspection items All items specified in 5.2 ~ 5.6. 7.3.3 Group-batch Use 100 pieces as a batch; perform random sampling from a batch of products which approach regular inspection. 7.3.4 Sampling Randomly select 4 pieces from the inspection batch. 7.3.5 Judgement rules8 Marking, packaging, storage, transportation8.1 Marking There shall be an obvious mark on each grating, including product mark, inspector code, factory name and production date. 8.2 Packaging The grating shall be edged with cardboard and be bound properly. 8.4 Transportation 8.4.1 When transporting the grating, the bottom of the vehicle and ship shall be flat; during the long-distance transport, it shall be bound firmly to avoid falling. JC/T 1026-2007 JC BUILDING MATERIAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 91.060.20 Q 23 Filing No.. 20464-2007 Glass fiber reinforced thermosetting resin grating for supporting loads Issued on. APRIL 13, 2007 Implemented on. OCTOBER 01, 2007 Issued by. National Development and Reform Commission of PRCTable of ContentsForeword... 3 1 Scope... 4 2 Normative references... 4 3 Terms and definitions... 5 4 Product specifications, size and marking... 5 5 Technical requirements... 9 6 Test method... 11 7 Inspection rules... 12 8 Marking, packaging, storage, transportation... 14 Appendix A (Normative) Load-bearing capacity test of glass fiber reinforced thermosetting resin grating (3-point bending method)... 15ForewordAppendix A of this standard is a normative appendix. This standard was proposed by China Building Materials Industry Association. This standard shall under the jurisdiction of the National Fiber Reinforced Plastics Standardization Technical Committee. The main drafting organizations of this standard. Haohua Zhongyi FRP Co., Ltd., Nantong Meigu Composite Material Co., Ltd., Nantong Mingkang Composite Material Co., Ltd., Nantong Qiangli Plastic Co., Ltd., Beijing FRP Institute Composite Material Co., Ltd. The main drafters of this standard. Wang Lei, Fu Xinlan, Jiang Guitang, Yang Aiyun, Gu Jianzhong, Fang Min. This standard is issued for the first time. Glass fiber reinforced thermosetting resin grating for supporting loads1 ScopeThis standard specifies the structure, size, product model and marking, technical conditions, load-bearing requirements, inspection rules and packaging, marking, storage and transportation of glass fiber reinforced thermosetting resin grating (hereinafter referred to as grating). This standard applies to industrial platforms, floors, walkway paving, stair treads, trench covers, fences and other load-bearing gratings in petrochemical, metallurgy, light industry, shipbuilding, energy, municipal and other industries. Non-load-bearing gratings can be implemented with reference to this standard.2 Normative referencesThe provisions in following documents become the provisions of this Standard through reference in this Standard. For the dated references, the subsequent amendments (excluding corrections) or revisions do not apply to this Standard; however, parties who reach an agreement based on this Standard are encouraged to study if the latest versions of these documents are applicable. For undated references, the latest edition of the referenced document applies. GB/T 1446-2005 Fiber-reinforced plastics composites - The generals of test methods GB/T 1449-2005 Fiber-reinforced plastic composites - Determination of flexural properties GB/T 1462-2005 Test methods for water absorption of fiber reinforced plastics GB/T 3854-2005 Test method for hardness of reinforced plastics by means of Barcol impresser3 Terms and definitionsThe following terms and definitions apply to this standard. 3.1 Molded grating A board with a certain open rate made by a special process on a customized mold with thermosetting resin as the matrix and glass fiber roving as the skeleton. The product is composed of several shapes of gratings; has the characteristics of bidirectional bearing in the longitudinal and lateral directions; 3.2 Pultruded grating A board with voids made by a certain assembling process with the pultruded I and T profiles as load-bearing ribs, pipes or bars as connecting rods. The product has high strength in the direction of the load-bearing ribs; it is often used under conditions of large spans. The pultruded grating is as shown in Figure 2.4 Product specifications, size and marking4.1 Grating size 4.1.1 The grid sizes of commonly used molded gratings are as shown in Figure 3 and Table 1.The gratings of other sizes can be designed according to user requirements. 4.1.2 The commonly used pultruded grating structure is as shown in Figure 4 and Figure 5.The specifications are as shown in Table 2.The gratings of other specifications can be designed according to user requirements.5 Technical requirements5.1 Raw materials 5.1.1 Resin 5.1.1.1 The unsaturated polyester resin used in the grating shall meet the requirements of GB/T 8237-2005; the epoxy resin used shall meet the requirements of GB/T 13657-1992.Other resins shall meet the requirements of corresponding standards. 5.2 Appearance The grating shall be smooth, flat, uniform in color, free of delamination, burrs, cracks, fiber exposure or impurities. It is not allowed for pores larger than Φ3 mm. The number of pores larger than 1 mm and less than 3 mm on any 300 mm x 300 mm area of the grating plate shall not exceed 10. 5.3 Grating size deviation 5.3.1 The length and width deviation of the grating is. -3 mm ~ +3 mm for molded grating and -6 mm ~ +6 mm for pultruded grating. 5.5 Barcol hardness Barcol hardness is not less than 40. 5.6 Load-bearing capacity 5.6.1 See Table 3 for design loads. 5.6.2 For load-bearing structures such as access platforms, stairwell platforms, overhaul platforms, under the design loads listed in Table 3, the deflection at the midpoint of the grating shall not be greater than 1/120 of the span, the maximum shall not exceed 9 mm. Meanwhile it shall meet the following requirements.6 Test method6.1 Appearance 6.1.1 Use visual inspection for appearance. 6.1.2 The size of the pores on the outer surface shall be inspected with a vernier caliper which has an accuracy of 0.02 mm. 6.2 Determination of grating size 6.2.1 Divide equally into four parts along the width of the grating. Use a steel tape which has an accuracy of 1 mm to measure the length of the grating. Take the arithmetic average of the three measurement results. 6.3 Water absorption The water absorption test is carried out according to GB/T 1462-2005. 6.4 Barcol hardness Barcol hardness test is carried out according to GB/T 3854-2005. 6.5 Load-bearing capacity The load-bearing capacity test is carried out in accordance with Appendix A.7 Inspection rules7.1 Inspection category Product inspection is divided into exit-factory inspection and type inspection. 7.2 Exit-factory inspection 7.2.1 Inspection items The exit-factory grating shall be inspected for appearance, dimensional deviation and Barcol hardness. 7.2.3 Judgement rules 7.3 Type inspection 7.3.1 Inspection conditions Type inspection shall be carried out in one of the following situations. a) When the material, structure and process have obvious changes after the first production or normal production, which may affect the product performance; 7.3.2 Inspection items All items specified in 5.2 ~ 5.6. 7.3.3 Group-batch Use 100 pieces as a batch; perform random sampling from a batch of products which approach regular inspection. 7.3.4 Sampling Randomly select 4 pieces from the inspection batch. 7.3.5 Judgement rules8 Marking, packaging, storage, transportation8.1 Marking There shall be an obvious mark on each grating, including product mark, inspector code, factory name and production date. 8.2 Packaging The grating shall be edged with cardboard and be bound properly. 8.4 Transportation 8.4.1 When transporting the grating, the bottom of the vehicle and ship shall be flat; during the long-distance transport, it shall be bound firmly to avoid falling. ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al. 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