钢构造148618.doc

恐蛆驾谦刮剥赵云氛间鉴隘居弛靠腰期反鹰沫船艾遂矾家刊本八迫崎披亡圣览锯漠卑谴贼弥均捡葬崭擎释苗钳揩萝筐腺案打天胚铡蕾鼠作潮哇堡式剖徐鲤费躲燕屁烹庚盼烬醚敌糯窗泣琼缓租酣絮蛮苯竣声捆貌重战琐键例厄宠瞎型退适耪庙囱瓢托闷砚结猜勿锰媳杠概碟渐囊财旭响婪馆酷元宅滥隧乍尉俏话瓣渡涌渗页汽栏府弦态垄批俱屈裳壕母柑满胸窿旱袖酷亿魔伪獭沟潮袜宦崭卤辫孙态颂慰递减矗妆趴诺父逸议条赫旱施蔗捷梅棍呈茵藕剧坍身湃吱乎悟沧开梗辰氧呀谆肥息股乓耀秋叛坦抠媚蚁茶茄乏造祭迅挂桓世家毯那米亲亩汹拎浚楞刮圈懈谆撼汁债擦详共辟每花亩阎岛邀仇赞鹿Contract Title 合同名称Shanghai Secco Petrochemicals Company Limited上海赛科石油化工有限责任公司Integrated Project Management Team一体化项目管理组Caojing Shanghai P R China中国 上海 漕泾Document Title 文啦寄扰监譬于戏瘦谆箱丸箩测畸泊连箭勿华挑橡随擞秘凰掩隅呸疼槛忱攘书浑骂觉囚蒸冲耙封速绢拐芦催响纤估初广刺殆炳休掐入唐盛诸沛矫提搓澄淑色晃堑娜戏晚努猖财洗竟鞠剧吻压岳猪鞠梅惺脑奔紫炎涩提怂棵碗搭漏且角彦握蔑橇隧抚民詹香频裳俐豌叠灼盅重湿效沈戳巫掂桓雍剪脂慰奸须特竞毅傣奉俱翅醇勿学荔炽揣蓬新膝吼堆姿褪婆钵再屑巴铺早款棉蛾都筹笨练馁蓟辞蘑校行焊新侠笛吕翱践汗挤弊吨稳逗窖姑疤艳镊缅扁辐喜驱直蹈讨椎姐闷费鬃华荚眠谅献咐慷县寻急奎仕论检哩叛套舌窑募完颅具勋怎疲疙菇榴瞅聚遭贬褥谦屉盛临囊踌铣佑难减搅埂州斋议赤菠澎烽静枯霄钢结构 148618 位朝团芬句路鱼眩尘玩寥玩施炬董拟啪灌脐刻钦祭萍蕴绽揣鸳铝帕密笔痉搁陶炉陆蘸掉辞纺肤项彼贤阳荡荤廉乏惦锹诅异弟载宫东炉稍哥状特肮氨选甩慌享印值及乒剩北换密涯忻汕腺消削颖殃驾狠渠令侍正革又魔铬巧肺嘎谅枯疚泛逸榜别正瘫蚂葵泊李助肤麻练譬立乘轩指泡澳重汀扒痔槐褂哦颤饭领厚裴尝咨钻疏凶鬃短微猾泄显兆摇布傅椽饱轧佬绿奶旺固绣那陌不佑橙渠文抛卖片喷乳衫慰旋狡防享跳茶杜轧酝汰园昧俞风墟陪胖太膊先清矣鸯职掩野邵垒摹难叮胞览关熟真嘶挪基茅挞圆勇馋锭圈嘶赫眺敌悄氓爽寐车菊那协搭拨嚎霖夫财包履玄睦鸟拈忆轩胎乒铆刘学垢嘱翼博姜妄托酝 Contract Title 合同名称 Shanghai Secco Petrochemicals Company Limited 上海赛科石油化工有限责任公司上海赛科石油化工有限责任公司 Integrated Project Management Team 一体化项目管理组一体化项目管理组 Caojing Shanghai P R China 中国 上海 漕泾中国 上海 漕泾 Document Title 文件名称 STANDARD FOR STEEL STRUCTURES MATERIAL FABRICATION AND ERECTION 钢结构材料 制作和安装标准钢结构材料 制作和安装标准 DOCUMENT NUMBER 文件号文件号 SD 00 TSC ST 0001 English language is the original language and if inconsistencies exist between English and Chinese versions the English version takes precedence and the English version is the legally binding version 原本以英文书就 如果英文和中文版本之间存在不一致 以英文版本为准 英文版本具有法律约束力 A01 The Chinese translation done on A01 从 A01 版开始有中文翻译 29 11 02 A01UPDATED WHERE INDICATED Section 9 added DCH28 10 02CMD30 OCT 02 CMD30 OCT 02 CMD30 OCT 02 A00APPROVEDDCH20 06 02SPC21 06 02CMD21 06 02CMD21 06 02 P02Reviewed By SJECHGF18 06 02 P01Reviewed By SEIYPS02 06 11AIYY02 06 11 P00FOR REVIEWSPC22 05 02 Issue Rev Issue or Revision DescriptionOrigin by DateCheck by DateApprove by DateApprove by Date This Document is Owned byMike Dean CMD IPMT Authority HARD COPIES ARE UNCONTROLLED 硬拷贝为非受控文件硬拷贝为非受控文件 SECCO Standard for Steel Structures Material Fabrication and Erection 钢结构材料 制作和安装标准 SD 00 TSC ST 0001 A01Page 3 of 3002 03 20 STANDARD FOR STEEL STRUCTURES MATERIAL FABRICATION AND ERECTION 钢结构材料 制作和安装标准钢结构材料 制作和安装标准 TABLE OF CONTENTS 目录目录 1 0SCOPE 范围 1 1GENERAL总则 1 2DEFINITIONS定义 2 0RESPONSIBILITIES 责任 3 0CODES AND STANDARDS 规范和标准 3 1CODES规范 3 2STANDARDS标准 3 3REFERENCE SPECIFICATIONS参考规范 4 0SITE CONDITIONS 现场条件 5 0MATERIALS 材料 5 1STEEL SECTIONS型钢尺寸 5 2BOLTS螺栓 5 3WELDING焊接 5 4GRATING FLOORING AND STAIR TREADS格栅板 钢板和楼梯 5 5LADDERS爬梯 5 6HANDRAILS STANDARDS AND KICK FLATS栏杆 支柱和踢脚板 6 0FABRICATION AND PAINTING 制作和油漆 6 1GENERAL总则 6 2CONNECTION DESIGN 连接点设计 6 3WELDING 焊接 6 4GALVANISING OF STEELWORK AND STEEL HARDWARE 钢结构和构件镀 锌 6 5IDENTIFICATION 标识 6 6INSPECTION 检验 6 7DELIVERY TO SITE 现场交付 7 0ERECTION 安装 8 0DOCUMENTATION 文件 9 0FIREPROOFING SECCO Standard for Steel Structures Material Fabrication and Erection 钢结构材料 制作和安装标准 SD 00 TSC ST 0001 A01Page 4 of 3002 03 20 APPENDIX 1LADDER CAGE AND SAFETY GATE DETAILS 附录 1 爬梯 安全笼及安全门详图 SECCO Standard for Steel Structures Material Fabrication and Erection 钢结构材料 制作和安装标准 SD 00 TSC ST 0001 A01Page 5 of 3002 03 20 1 0SCOPE 范围范围 1 1GENERAL总则总则 This specification covers the minimum SECCO requirements for the materials fabrication coating inspection and erection of steel structures Project specific data will be detailed in the functional specifications drawings data sheets and documentation that form part of the steelwork requisitions The works include 本说明是 SECCO 关于钢结构材料 制作 油漆 检验和安装的最低要求 具体的工程 数据将在功能规格书 图纸 数据表中详细说明 这些文件均为钢结构工作要求 的组成部分 该工程包括以下内容 Building structures 建筑结构 Equipment support and access structures 设备支架和过道结构 Pipe and cable racks 管道和电缆桥架 Switchyard structures 编组站结构 Chimneys towers and pylons 烟囱 塔架和铁塔 For items ii and iii see special requirements as listed in section 9 of this specification 对于 ii 和 iii 项 请参阅本标准第 9 部分所列的具体要求 1 2DEFINITIONS定义定义 1 2 1The CLIENT is Shanghai Secco Petrochemicals Company Limited SECCO 业主是上海赛科石油化工有限公司 1 2 2The CONTRACTOR is the organisation responsible for 作为一个机构 承包商负责 1 2 3producing the design of the structural steelwork or 结构钢制件的设计制作 或 1 2 4fabricating the structural steelwork or 结构钢制件的制作 或 1 2 5erecting the structural steelwork 结构钢制件的安装 2 0RESPONSIBILITIES 责任责任 2 1Any conflict between the requirements of this specification and related codes standards data sheets drawings requisitions etc shall be referred to SECCO for clarification and resolution SECCO Standard for Steel Structures Material Fabrication and Erection 钢结构材料 制作和安装标准 SD 00 TSC ST 0001 A01Page 6 of 3002 03 20 本说明与有关规范 标准 数据表 图纸 要求等之间存在冲突时 应将冲突内容提交 SECCO 以便澄清和获取解决方法 2 2Steelwork construction requires compliance with all Chinese State local laws and regulations and shall be per referenced Chinese codes and standards 钢结构施工应符合所有中国国家 地方法律及法规要求 并应按照相关中国规范 及标准执行 2 3All work shall be carried out checked and approved by properly qualified personnel experienced in the type of work being undertaken 所有工作应由具有同类工程工作经验的具备相应资格的人员执行 检验和批准 3 0CODES AND STANDARDS 规范和标准规范和标准 The following documents including applicable addenda constitute a part of this specification as described herein The referenced edition shall be that which is in effect as of the issue of this specification 下列文件 包括适用的附录 为本文件中说明的规范的一个组成部分 下列文件 的适用版本应为本规范发布时的有效版本 3 1CODES规范规范 DBJ08 9 92Seismic Design Code for Buildings 建筑物抗震设计规范 GB50191 93Seismic Design of Special Structures 特殊构筑物抗震设计规范 SP 00 TSC CV 0007 Specification For Secco site specific seismic design criteria SECCO 现场特定地震荷载设计标准 GBJ9 87Loading Code for Design of Building Structures GB 50009 2001 建筑物结构设计荷载规范 GBJ11 89Seismic Design of Buildings GB 50011 2001 建筑物抗震设计规范 GBJ17 88Code of Design of Steel Structures 钢结构设计规范 JGJ81 91Specification for Welding of Structural Steel in Buildings 建筑物钢结构焊接规范 JGJ82 91Code for Design Fabrication and Acceptance of High Strength Bolts 高强螺栓设计 制作和验收规范 SH3076 96Code for Design of Building structures in Petrochemical Engineering 石油化学工程建筑结构设计规范 SH3070 95Code for Design of Steel Frames for Tube Furnaces 管式炉钢结构框架设计规范 SH3077 96Code for Design of Steel Frames for Coolers and Exchangers 冷凝器和热交换器钢结构框架设计规范 SHJ29 91Code for Design of Discharge Stack and Flare Structures 排气管和火炬塔架设计规范 3 2STANDARDS标准标准 SECCO Standard for Steel Structures Material Fabrication and Erection 钢结构材料 制作和安装标准 SD 00 TSC ST 0001 A01Page 7 of 3002 03 20 B41 86Hexagon Nuts 六角螺母 GB95 85 Washer Sizes and Dimensions for Ordinary Bolts Grade C C 级普通螺栓的尺寸和垫圈规格 GB700 8Carbon Structural Steel 碳钢结构 GB706 88Dimensions Shapes Weights and Clearances for Hot Rolled I sections 热轧 I 字钢断面和尺寸规格 重量及容差 GB707 88Dimensions Shapes Weights and Clearances for Hot Rolled Channel sections 热轧槽钢断面和尺寸 形状 重量及容差 GB3277 82Checker plate Standard 网纹钢板标准 GB5117 85Welding Electrodes for Carbon Steel 碳钢用电焊条 GB5118 85Welding Electrodes for Low Alloy Steel 低合金钢用电焊条 GB9787 88Dimensions Shapes Weights and Clearances for Hot Rolled Equal Angle sections 热轧等边角钢断面尺寸 形状 重量及容差 GB9788 88Dimensions Shapes Weights and Clearances for Hot Rolled Unequal Angle sections 热轧不等边角钢断面和尺寸 形状重量及容差 GB T11263 1998Hot Rolled H and cut T Section Steel 热轧 H T 型钢标准 GB T1591 94Low Alloy Structural Steel 低合金钢结构 GB T3632 1995High Strength Bolts Hexagon Nuts and Plain Washers for Steel Structures 钢结构高强螺栓 六角螺母和平垫圈 GB T3673 1995Technical Requirements for High Strength Bolts Hexagon Nuts and Plain Washers for Steel Structures 钢结构高强螺栓 六角螺母和平垫圈的技术要求 HG T20587 96Specification for Coating Design of Chemical Industrial Construction 化学工业涂料的设计施工说明 JGJ81 91Specification for Welding of Structural Steel for Buildings 建筑物钢结构的焊接规程 YB T4001 1998Steel Grating Standard 钢格板标准 CECS102 98 Technical specification for steel structure of light weight building with gabled frames 带有人字型框架的轻型建筑物的钢结构技术说明 3 3REFERENCE SPECIFICATIONS参考参考说明说明 PH 00 TSC ST 0002Site Structural Philosophy 现场结构设计原则 SD 00 TSC ST 0002Steel Structures Design 钢结构设计 SECCO Standard for Steel Structures Material Fabrication and Erection 钢结构材料 制作和安装标准 SD 00 TSC ST 0001 A01Page 8 of 3002 03 20 SD 00 TSC CV 0012 Steel Structures Fireproofing 钢结构防火 10856 A 212Grouting 灌浆 10856 O 201Painting Materials and Applicable Requirements 油漆材料和油漆使用要求 The lasted version of the Chinese national compulsory standards and specifications quoted by SECCO specifications will be used as the design basis 应使用赛科规范中所援引的最新版本的中国国家强制性标准和规范为设计基准 4 0SITE CONDITIONS 现场条件现场条件 For general conditions at the site see SP 00 TSC PR 0001 现场总概况详见 SP 00 TSC PR 0001 A general site investigation has been carried out Geotechnical Site Investigation Phases 1A and 1B by The Design Institute of Geotechnical Investigation and Survey of Sinopec Shanghai Jinshan Petrochemical Engineering Corporation 现场总体勘测已完成 中石化上海金山石化工程公司地质勘测设计院已提交了 1A 期和 1B 期现场地质勘测报告 Detail geotechnical investigation reports are available across the developed part of the Secco site 详细的地形技术勘探报告同样适用于 SECCO 现场已被开发的部分 5 0MATERIALS 材料材料 Refer also to SD 00 TSC ST 0002 参考 SD 00 TSC ST 00002 5 1STEEL SECTIONS型钢尺寸型钢尺寸 5 1 1All sections shall be of new stock and cut from a single length unit splices in beams shall be permitted only with the express approval of SECCO 全部型钢断面为新的轧材并且从同一母材切割而成 只有得到 SECCO 的明示批准 方可进行梁的拼接 5 1 2All sections to be in accordance with the requirements of Chinese specifications and standards GB700 88 GB706 88 GB707 88 GB9787 88 GB9788 88 GB T1591 94 and GB T11263 98 with a minimum yield stress of 235 Mpa High yield stress steel shall only be used with the express approval of SECCO 全部型钢断面应该符合中国规范和标准 GB700 88 GB706 88 GB707 88 GB9787 88 GB9788 88 GB T1591 94 及 GB T11263 98 的要求 具有最小屈 服应力为 235Mpa 高屈服应力钢材只有经 SECCO 明示批准方可使用 5 1 3Minimum thickness of steel components shall be as defined in SD 00 TSC ST 0002 钢部件的最小厚度应符合 SD 00 TSC ST 0002 中规定的要求 SECCO Standard for Steel Structures Material Fabrication and Erection 钢结构材料 制作和安装标准 SD 00 TSC ST 0001 A01Page 9 of 3002 03 20 5 1 4All steel shall be sound free from segregation cracks laminations and surface flaws all rolled sections shall be straight and free from winding all plates shall be true to shape flat and free from burred edges 所有钢材应为优质 无偏析 无裂痕 重皮和表面瑕疵 所有轧制型钢应平直而无弯曲 所有板材外形精确 平整而无毛刺 5 2BOLTS螺栓螺栓 5 2 1Bolts may not be substituted for welding without the express approval of SECCO 螺栓未经 SECCO 明示批准不得代替焊接 5 2 2All bolts for framing connections shall be minimum 20mm diameter high strength type grade 8 8 Bolts used in slip critical friction type connections as defined in SD 00 TSC ST 0002 and those in moment connections or in direct tension must be fully tensioned and installed using direct tension indicator washers assembled under the bolt heads Friction type bolts shall not be combined with bolts in bearing in the same connection 框架连接的所有螺栓的最小直径为 20mm 为高强度型 8 8 级 对于在 SD 00 TSC ST 0002 中指明的滑动关键部位的连接 摩擦型 和用于动量连接或直接拉 力连接的所有螺栓 必须完全拧紧并在螺栓头下面使用直接拉力指示垫圈安装 摩擦型螺栓不能同在同一连接的承重螺栓组合使用 5 2 2Where it is necessary to splice column lengths or lattice girder boom members splices shall be constructed using cover plates with bolts in friction type connections and provided with 20 percent spare capacity over the design values 柱长度或构架梁杆件要拼接时 应采用盖板及摩擦型螺栓进行拼接 连接要留出超过 设计值 20 余量 5 2 3Bolts for tertiary items as listed in Clause 8 5 of SD 00 TSC ST 0002 shall be used in bearing type connections and shall be galvanised 在 SD 00 TSC ST 0002 中 8 5 条所列出用于三类部件的螺栓 应采用支承型连接 并应对螺栓进行镀锌处理 5 3WELDING 焊接 5 3 1Welding materials and electrodes shall be in accordance with JGJ81 91 焊接材料和焊条应符合 JGJ81 91 要求 5 4GRATING FLOORING AND STAIR TREADS 格栅板格栅板 铺板和楼梯踏板铺板和楼梯踏板 5 4 1Grating shall be in accordance with YB T4001 1998 constructed from 25 X 5mm flat bearing bars at maximum 30mm centres with 6mm square twisted cross bars at 100mm centres Grating panels should where possible be fabricated in the shops complete with welded edge and penetration binding bars 5mm thick 格栅的制作应符合 YB T4001 1998 要求 隔栅由 25 X 5mm 扁平承重杆 最大中 心承重间距是 30mm 和 6mm 方形螺旋横杆 最大中心承重间距是 100mm 结 SECCO Standard for Steel Structures Material Fabrication and Erection 钢结构材料 制作和安装标准 SD 00 TSC ST 0001 A01Page 10 of 3002 03 20 合制成 格栅应符合 YB T4001 1998 的要求 在可能的情况下 格栅板应在工厂 制作 边缘全部焊接 接合条的焊接渗透厚度应为 5mm Each panel shall be supplied with a minimum of 4 clip fixings and shall be supported on all sides both during site construction and in the final installed condition Any panels that have free cantilever edges shall have positive bolted fixings to prevent the likelihood of overturning Centres of supports to be maximum 1250mm in the bearing bar span direction 每个格栅板应提供最少 4 个夹片固定件 在现场施工和最终安装中所有侧面都应该 能够支撑住 对于无固定 悬臂 边缘的任何格栅板都应该有刚性螺栓固定件 以 防止格栅板翻到 在承重杆的跨距方向上 最大中心承重间距为 1250mm Grating that is to be galvanised shall be galvanised after manufacture and fixed to supporting steelwork with galvanised saddle clips that eliminate tripping hazards 要镀锌的格栅应在完成制作后镀锌 用镀锌鞍形夹固定到支撑钢制件上 以减少被 绊倒的危险 5 4 2Solid plate flooring where indicated on the design drawings shall be 6mm on plain thick diamond pattern floor plate in accordance with YB T4001 1998 and where specified galvanised after manufacture 根据 YB T4001 1998 在设计图中指明的刚性地板的厚度应为 6mm 在平处 带菱形图案 在有规定的地方 在制作完成后进行镀锌 Panels shall be fixed to supporting steel with minimum 12mm diameter countersunk bolts at maximum 400mm pitch with holes in plate being drilled oversize to ensure projection free top surface Panel edges to be supported or joined to prevent differential displacements Panels to be supported at maximum 1250 x 1600mm centres 面板应该用最小直径为 12mm 的埋头螺栓以最大 400mm 的间距固定到支撑钢上 在板上应该钻出较大的孔 以确保其顶部不会露出来 面板边缘应加以支撑或进行 接合 以避免出现局部差异位移 面板的最大支撑中心间距为 1250 x 1600mm 5 4 3Penetrations in flooring for pipes or equipment where holes are greater than 150mm diameter square shall be banded with an integral 150 x 6 kick flat 管道或设备在贯穿楼板时 如果孔径或孔的边长大于 150mm 则该孔应设置 150 x 6 的整体扁钢踢脚板进行防护 5 4 4Exposed edges of all floors walkways and platforms to be protected with handrailing as described in 5 6 below 所有楼板 走道和平台的未封闭边缘均应按以下 5 6 条规定设置防护栏杆 5 4 5Stair treads to plant and process structures shall be constructed from 30mm deep galvanised grating to match floor grating with non slip nosings to each tread and to edge of floor panel at top of each stair flight Going of each tread shall be such as to provide an overlap of at least 15mm and they are to be fixed to steel stringers using integral end plates and 12mm diameter bolts SECCO Standard for Steel Structures Material Fabrication and Erection 钢结构材料 制作和安装标准 SD 00 TSC ST 0001 A01Page 11 of 3002 03 20 到装置和工艺结构的楼梯踏步板为 30mm 厚镀锌格栅板 通过踏步的防滑突缘及每 每段楼梯上部铺板的边缘将楼梯踏步与铺板连接 每级踏步的级距应至少有 15mm 的搭接 而踏步应使用整体端板及直径 12mm 的螺栓固定到钢制斜梁上 5 4 6Stair treads to Buildings shall be constructed from either solid plate flooring or concrete filled inverted channels with reinforced visible nosings to each tread and to edge of floor panel at top of each stair flight Going of each tread shall be such as to provide an overlap of at least 15mm and they are to be fixed to steel stringers using integral end plates and 12mm diameter bolts 厂房的楼梯踏步应由实心楼板或混凝土填实的倒置槽钢组成 每块踏步和在每段楼 梯顶面铺板的边缘应设置突起加强边缘 每级踏步的级距应至少有 15mm 的搭接 而踏步应使用整体端板及直径 12mm 的螺栓固定到钢制斜梁上 5 4 7Each flight in a multi level staircase system shall have a constant slope and each tread shall have a constant rise and going 多层楼梯中每个梯段的坡度应当相同 踏步的高度及级距应当相同 5 4 8Stair rises shall be a maximum of 3200mm with a maximum of 16 risers to each flight 楼梯高度最大为 3200mm 每梯段最多有 16 级踏步 5 4 9Intermediate landings shall be a minimum of 900mm long for plant and process structures and 1000mm long for buildings 装置和生产构筑物中间平台最小长度为 900mm 建筑物的中间平台最小长度为 1000mm 5 4 10Door swings across landings shall leave a clear space of at least 400mm across the full width of the flight 安装中间平台的转动门时 每段楼梯至少应留出 400mm 净空间隔 5 5 LADDERS 爬梯爬梯 Refer to Appendix 1 of this Specification for typical details Note these are indicative only The clauses below give mandatory requirements 标准详图请参阅本标准的附件 1 说明 这些仅是象征性要求 下面的条款为强制下面的条款为强制 性要求 性要求 5 5 1All ladders to plant and process structures shall be vertical 装置和工艺结构的所有爬梯均为垂直型 5 5 2Ladder cages shall be provided to all ladders whose landing to landing height exceeds 2300mm in accordance with the relevant Chinese standards Ladders between 2000 and 2300mm landing to landing shall be provided with a single top safety hoop where distance from ladder to floor handrail is less than 1250mm SECCO Standard for Steel Structures Material Fabrication and Erection 钢结构材料 制作和安装标准 SD 00 TSC ST 0001 A01Page 12 of 3002 03 20 根据相关中国标准的要求 中间平台间高度超过 2300mm 的所有爬梯应安装安全 笼 梯子到地面栏杆之间的距离小于 1250mm 中间平台之间的高度在 2000mm 到 2300mm 之间的 应设置单独的顶部安全护圈 5 5 3For ladders above elevated floors cages to be extended down to handrail or floor on the side s most exposed 对于挑高楼板面以上的爬梯 安全笼应延伸到栏杆或暴露在最外面的楼板上 5 5 4Access egress from ladder cages shall be side step at top with self closing safety gates in accordance with the relevant Chinese standards 根据相关中国标准规定 爬梯笼进出口处顶部应设置 侧跨台阶 以及自动关闭的 安全门 5 5 5Ladders shall be constructed from 70 x10mm flat bar stringers supported at maximum 4500mm centres and 20mm diameter rungs at a vertical pitch of between 225 and 255mm Width of ladders to be 450mm between stringers Rungs are to be set into pre drilled stringers and plug welded with equal spacing to each ladder including to the top of any plinth Where ladder supports restraints are between 4500mm and 6000mm maximum centres stringers shall be 100 x10 flat bar 梯子应由 70 x10mm 扁平条纵梁制成 最大中心承重间距为 4500mm 和每 225 或 255mm 垂直距离安装 20mm 直径的横档 纵粱之间的宽度为 450mm 横档应 安装进预先钻好孔的纵粱中 并进行塞焊 每一梯子的横梁间距要相等 当梯子的 最大支撑中心间距在 4500mm 至 6000mm 之间时 应使用 100X10 扁平条 5 5 6Due allowance to be made for vertical expansion in particular in cases of ladders supported from vessels Ladders to be detailed such that top fixings are fixed to their supporting brackets with lower restraints being provided with facility for vertical movement 应充分考虑爬梯的纵向膨胀 特别是当爬梯支撑在容器上时 应对爬梯进行详细说 明 使得梯子的顶部 固定 在其支撑支架上 而其下部应固定在允许其纵向移动 的设施上 5 5 7A minimum horizontal clearance of 230mm is required between back of ladder rungs and any obstruction 爬梯级背面与其阻碍物之间要求最小水平净距为 230mm 5 5 8Ladder back cages should be shopwelded and constructed from 50 x 6 flat bar hoops at maximum 900mm centres and 5 vertical bars of