DB37∕ 5008-2014 建筑施工直插盘销式模板支架安全技术规范(山东省).pdf

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1、山 东 省 工 程 建 设 标 准DB37/5008-2014 J 12588-2014DB山东省工程建设标准建筑施工直插盘销式模板支架安全技术规范Technical code for safety of straightly inserted disk and pin-joined formwork support in constructionDB37 5008-2014住房和城乡建设部备案号：J 12588-2014中国建筑工业出版社2014济南批准部门：施行日期：山东省住房和城乡建设厅山东省质量技术监督局2 0 1 4 年 0 5 月 0 1 日?2014?3?DB37 5008-20

2、14?J 12588-2014?2014?5?1?9.0.3?2014?3?24?3?265?255086?0533-3598518?45?1?1 2?2 2.1?2 2.2?3 3?73.1?7 3.2?8 3.3?9 4?114.1?11 4.2?11 4.3?13 4.4?14 5?155.1?15 5.2?16 5.3?18 5.4?22 5.5?22 6?246.1?24 6.2?27 7?307.1?30 7.2?30 8?32 8.1?32 678.2?33 8.3?34 8.4?35 9?36?A?37?B?40?C?z41?D?42?E?44?49?50?51?Content

3、s1 General Provisions12 Terms and Symbols22.1 Terms2 2.2 Symbols3 3 Main Components73.1 Main Components7 3.2 Material Requirments8 3.3 Production Quality Requirements9 4 Loads11 4.1 Loads Classification11 4.2 Characteristic Value of Loads11 4.3 Subentry Coefficient of Loads13 4.4 Combination of Load

4、s Effects14 5 Design and Calculation of Structure15 5.1 Basic Regulation for Design15 5.2 Calculation Designing for Formwork Support and Beam16 5.3 Stability of Upright Tube Checking18 5.4 Scaffold Stability Against Overturning Checking22 5.5 Foundation Bearing Capacity Checking22 6 Structure Requir

5、ements24 6.1 General Requirements24 6.2 Structure of Frame Support with Diagonal Bracings277 Construction307.1 Preparation for Construction307.2 Installation and Disassembly308 Inspection and Acceptance328.1 Inspection and Acceptance of Components32 898.2 Installation of Formwork Support System338.3

6、 Inspection in Operation of Formwork Support System34 8.4 Inspection and Acceptance of Technical Materials35 9 Safety management and maintenance36Appendix A Category and Specification of Production Component37Appendix B Design Parameters40 Appendix C Calculating Coefficients of Wind Load z41Appendix

7、 D Stability Coefficients for Axial Compression Members42Appendix E Effective Length Factors of Support Structures44Explanation of Wording in This Specification49List of Quoted Standards50Addition:Explanation of Provisions51111?1.0.1?1.0.2?1.0.3?24m?1.0.4?22?2.1?2.1.1?straightly inserted disk and pi

8、n-joined formwork support?2.1.2?disk-pin joint piont?2.1.3?disk plate?2.1.4?adapter plug?2.1.5?upright tube?2.1.6?connect collar of upright tube?2.1.7?ledger?2.1.8?U-head jack?2.1.9?jack base?2.1.10?transverse spacing of upright tube?2.1.11?longitudinal spacing of upright tube?232.1.12?frame support

9、 structure?2.1.13?rotational stiffness of joint?2.1.14?frame unit?2.1.15?diagonal bracing?2.1.16?height of formwork support?2.2?2.2.1?G1?G2?G3?gk?M?M1?MW?MWK?Mo?Mr?N?NGK?3 NQK?NWK?Pwk?Pnwk n?p?1?2?QQQ5 An?Aw?A?Ag?B?b?D?d?H?h?h?h1?h2?al?blmaxl?alblxl?x?yl?y?0l i?I?I1?I2?nb?nwa?nx?x?nZ?n?SL?t?W?56 61?

10、2?1?h1?h?2?h2?h?x?x?h?2.2.4?a?H?0?R?G?Q?k0?kc?z?s?st?stwn?Q?73?3.1?3.1.1?3.1.1?3.1.1?1?2?3?4?5?6?7?3.1.2?3.1.3?4?3.1.4?3.1.5?0.6m?0.3m78?3.1.6?A?A.1?3.2?3.2.1?3.2.1?3.2.1?Q235B?Q345 Q235B Q345?ZG270-500 ZG270-500 20?ZG270-500 Q235BZG270-500 Q235B3.2.2?GB/T 13793?GB/T 3091?Q235B?Q345?GB/T 700?GB/T 15

11、91?3.2.3?48.3mm3.6mm?48.3mm3.0mm?t?10%?3.2.4?GB/T 1591?Q345?600650?GB11352?ZG270-500?10mm?3.2.5?GB 11352?ZG270-500?10mm?3.2.6?100mm?40mm?3.2.7?57mm3.2mm?20?8?GB/T 8162?160mm?110mm?GB11352?ZG270-500?90mm?75mm?2mm?3.2.8?38mm?6?30mm?500mm?3.2.9?Q235B?5mm?40mm?40kN?3.2.10?JGJ 130?3.3?3.3.1?CO2?GB/T 8110

12、?3.5mm?3.3.2?0.3mm?0.3mm?60kN?3.3.3?1?910 2?1/500?3?4?5?6?7?3.3.4?8.1.1?8.1.2?104?4.1?4.1.1?4.1.2?1?G1?2?G?QQQ122?A.2?3?25.5kN/m3?25.1kN/m3?1.1kN/m3?1.5kN/m3?4.2.2?1?3kN/m2?2.5kN?2?2%?3?kzsw0w?4.2.2?wk?kN/m2?z?C?s?4.2.3?wo?kN/m2?GB 50009?n=10?0.3kN/m2?4.2.3?s?GB 50009?st=s?4.2.3-1?st?=1.2An/Aw?An?Aw

13、?1.2?12s?s=1.2?n?1n1ststw (4.2.3-2)?stwn?n?4.2.3?M M4.4?4.4.1?4.4.1?1?G?G?G?G?QQQQQQQ QQQ155?5.1?5.1.1?GB 50068?GB 50009?GB 50017?5.1.2?k?15kN?m/rad?5.1.3?1?2?3?4?5.1.4?JGJ 300?5.1.5?150?200?5.1.6?50mm?8m?100mm?5.1.7?5.1.8?1516?RRS?0?5.1.8?0?5.1.8?S?R?R?1.0?5.1.8?0?01.1 1.0 1.0 5.1.9?5.1.9?5.1.9?H 8

14、m?D 400mm?SL0.4m2?H?D?S?5.1.10?5.2?5.2.1?1617?5.2.2?fWM?5.2.2?N/mm2?M?N?mm?5.2.1?W?mm3?f?N/mm2?5.2.3?vfIbVS?0?5.2.3?N/mm2?V?N?S0?mm3?I?mm4?b?mm?vf?N/mm2?5.2.4?5.2.4?mm?mm?5.2.5?5.2.5?1?1/400?2?1/250?175.3?5.3.1?5.3.3-1?5.3.3-2?5.3.2?5.3.3-1?5.3.3-2?-一.1?=/i?0l0l?(mm)?5.3.8?5.3.9?i?mm?E?N/mm2?5.3.4?N

15、?,?1?N=GNGK+QNQK?5.3.4-1?2?N=GNGK+QQ?NQK+NWK?5.3.4-2?NGK?N?NQK?N?NWK?N?5.3.5?G?Q?Q?0.9?5.3.5?NWK?22nwkwk?5.3.5?Pnwkn?N/mm?Pnwk=wnk?alwnkn?N/mm?4.2.2-3?mm?alH?mm?B?mm?19?h单元框架纵向跨数（/Aa)7xd=0QMNZA/7=E7F4-CH21 WKw?Q?5.3.7-1?5.3.7-2?2?10wkWK?Q?MWK?N?mm?Pwk?N/mm?4.2.2-3?h?mm?5.3.8?0l =h?5.3.8-1?0l?+2k0h2?

16、5.3.8-2?=0lh?E?E.1?mm?h?h2?mm?k0?0.7?5.3.9?0l =Hah?5.3.9-1?0l?+2k0h2?5.3.9-2?=0lh?E?E.2?a?E?E.3?H?5.3.9?2122?5.3.9?HH51020 30 H1.00 1.11 1.16 1.19 5.4?5.4.1?8m?2?5.4.2?0M0 Mr?5.4.2?0?Mr?Mo?5.5?5.5.1?afp?5.5.1-1?5.5.1-2?g?p?(N/mm2)?af?(N/mm2)?N?N?5.3.4?Ag?mm2?5.5.2?1?2223?5.5.2?akcaff?GB 50007?akfkc?

17、1.0?0.4?2?GB 50010?GB 50017?236?6.1?6.1.1?6.1.2?H?3m?D?200mm?S?0.2m2?nl5逢256.1.4?3?3?6.1.5?1?2?50mm?200mm?2?6.1.6?1?1.5m?2?3?6.1.7?1?2?h1?550mm?3?1.8m?6.1.8?1?h2?650mm?2?300mm?200mm?3?2mm?25J=0IO9WMiA.y-Viv/?mm2u4Y/-/y/-/7/A/y?6跨且6垮且6n6跨且6n3E9V/W9V/?6跨且6mGl6n6壯6mkl40EZ9V/I电9V/W9v/19v/307?7.1?7.1.1?7

18、.1.2?:1?2?3?4?5?6?7?8?9?7.1.3?7.1.4?7.1.5?7.2?7.2.1?1?2?3?3031 31?6.1.5?4?5?6?0.5kg?1.2kN?7?4mm?8?1.5?30mm?9?7.2.2?1?GB50204?2?3?4?5?328?8.1?8.1.1?8.1.1?8.1.1?1?2?3?0.5mm?10%3%?4?0.18mm 3%?5?6?7?10%3%?8?9?10?5mm 3%?11?0.5mm 3%?12?32338.1.2?8.1.2?8.1.2?1?750?1?5.4.1?2?2000?3?60kN3?2000?3?30kN2000?3?1

19、0kN4?24kN?m/rad 5?C.3 8.1.3?JGJ 130?8.1.4?GB 50829?8.1.5?8.2?8.2.1?8.2.1?3334?8.2.1?mm?1?2?10?3?5?4?-20?8.2.2?8.2.2?8.2.2?1?1.5?30mm?2?3?3?10?4?5?5?1.2kN?6?8.2.3?JGJ 130?8.3?8.3.1?1?2?3?3435 354?5?8.4?8.4.1?1?2?3?4?5?369?9.0.1?9.0.2?9.0.3?9.0.4?9.0.5?4m?9.0.6?400mm?100mm?9.0.7?9.0.8?9.0.9?9.0.10?9.0

20、.11?9.0.12?JGJ 46?36?A?A.1?mm?mm?L?mm?kg?110600-xnx600JtMMAIwm|110+x1200600600251038?A.1?mm?mm?L?mm?kg?HG300 300 1.25 HG450 450 1.76 HG600 600 2.27 HG900 900 3.29 HG1200 1200 4.32?48.33.0 HG1500 1500 5.34 385.0500 UT-500 500 4.38?385.0600 UT-600 600 4.74?A.2?gk(kN/m)?bl?(m)al?h(m)(m)0.30 0.45 0.6 0.

21、9 1.2 1.5 0.30 0.1038 0.1136 0.1234 0.1429 0.1625 0.1822 0.45 0.1136 0.1230 0.1331 0.1527 0.1722 0.1920 0.6 0.1234 0.1330 0.1429 0.1625 0.1820 0.2020 0.9 0.1429 0.1530 0.1625 0.1820 0.2016 0.2210 1.2 0.1625 0.1720 0.1820 0.2016 0.2211 0.2410 0.60 1.5 0.1822 0.1920 0.2017 0.2213 0.2408 0.2610 383?A.2

22、?bl?(m)al?h(m)(m)0.30 0.45 0.6 0.9 1.2 1.5 0.30 0.0878 0.0944 0.1009 0.1139 0.1269 0.1401 0.45 0.0944 0.1010 0.1074 0.1204 0.1335 0.1470 0.6 0.1009 0.1070 0.1139 0.1269 0.1400 0.1530 0.9 0.1139 0.1200 0.1269 0.1400 0.1530 0.1660 1.2 0.1269 0.1330 0.1400 0.1530 0.1660 0.1790 0.90 1.5 0.1401 0.1470 0.

23、1531 0.1662 0.1792 0.1920 0.30 0.0798 0.0847 0.0896 0.0994 0.1092 0.1190 0.45 0.0847 0.0900 0.0945 0.1043 0.1141 0.1240 0.6 0.0896 0.0950 0.0994 0.1092 0.1189 0.1290 0.9 0.0994 0.1040 0.1092 0.1189 0.1287 0.1390 1.2 0.1092 0.1140 0.1189 0.1287 0.1385 0.1480 1.20 1.5 0.1190 0.1240 0.1288 0.1386 0.148

24、4 0.1580 0.30 0.0751 0.0790 0.0829 0.0907 0.0985 0.1064 0.45 0.0790 0.0830 0.0868 0.0946 0.1024 0.1100 0.6 0.0829 0.0870 0.0907 0.0985 0.1063 0.1140 0.9 0.0907 0.0950 0.0985 0.1063 0.1142 0.1220 1.2 0.0985 0.1020 0.1063 0.1142 0.1220 0.1300 1.50 1.5 0.1064 0.1100 0.1142 0.1221 0.1299 0.1380 0.30 0.0

25、719 0.0751 0.0784 0.0849 0.0914 0.0980 0.45 0.0751 0.0780 0.0816 0.0882 0.0947 0.1010 0.6 0.0784 0.0820 0.0849 0.0914 0.0979 0.1050 0.9 0.0849 0.0880 0.0914 0.0979 0.1044 0.1110 1.2 0.0914 0.0950 0.0979 0.1044 0.1110 0.1180 1.80 1.5 0.0980 0.1010 0.1045 0.1110 0.1175 0.1240 3940?B?B.1?N/mm2?Q235?205

26、 Q345?300?2.06105?B.2?d?mm?t?mm?A?mm2?I?mm4?W?mm3?i?mm?48.3 3.6 506 127085 5262 15.9 48.3 3.24 459 117009 4845 16.0 48.3 3.0 427 109996 4555 16.1 48.3 2.7 387 100888 4178 16.2 4041?C?z?m?AB CD51.09 1.00 0.65 0.51 101.28 1.00 0.65 0.51 151.42 1.13 0.65 0.51 201.52 1.23 0.74 0.51 301.67 1.39 0.88 0.51

27、 401.79 1.52 1.00 0.60 501.89 1.62 1.10 0.69 601.97 1.71 1.20 0.77 702.05 1.79 1.28 0.84 802.12 1.87 1.36 0.91 902.18 1.93 1.43 0.98 100 2.23 2.00 1.50 1.04 150 2.46 2.25 200 2.64 2.46 250 2.78 2.63 300 2.91 2.77 350 2.91 2.91?A?B?C?D?A?B?C?D?4142?D?D.1 Q235?01 2 3 45 67 8901.000 0.997 0.9950.9920.9

28、890.987 0.9840.9810.9790.976100.974 0.971 0.9680.9690.9630.960 0.9580.9550.9520.949200.947 0.944 0.9410.9380.9360.933 0.9300.9270.9240.921300.918 0.915 0.9120.9090.9060.903 0.8990.8960.8930.889400.886 0.882 0.8790.8750.8720.868 0.8640.8610.8580.855500.852 0.849 0.8460.8430.8390.836 0.8320.8290.8250.

29、822600.818 0.814 0.8100.8060.8020.797 0.7930.7890.7840.779700.775 0.770 0.7650.7600.7550.750 0.7440.7390.7330.728800.722 0.716 0.7100.7040.6980.692 0.6860.6800.6730.667900.661 0.654 0.6480.6410.6340.626 0.6180.6110.6030.595100 0.588 0.580 0.5730.5660.5580.551 0.5440.5370.5300.523110 0.516 0.509 0.50

30、20.4960.4890.483 0.4760.4700.4640.458120 0.452 0.446 0.4400.4340.4280.423 0.4170.4120.4060.401130 0.396 0.391 0.3860.3810.3760.371 0.3670.3620.3570.353140 0.349 0.344 0.3400.3360.3320.328 0.3240.3200.3160.312150 0.308 0.305 0.3010.2980.2940.291 0.2870.2840.2810.277160 0.274 0.271 0.2680.2560.2620.25

31、9 0.2560.2530.2510.248170 0.245 0.243 0.2400.2370.2350.232 0.2300.2270.2250.223180 0.220 0.218 0.2160.2140.2110.209 0.2070.2050.2030.201190 0.199 0.197 0.1950.1930.1910.189 0.1880.1860.1840.182200 0.180 0.179 0.1770.1750.1740.172 0.1710.1690.1670.166210 0.164 0.163 0.1610.1600.1590.157 0.1560.1540.1

32、530.152220 0.150 0.149 0.1480.1460.1450.144 0.1430.1410.1400.139230 0.138 0.137 0.1360.1350.1330.132 0.1310.1300.1290.128240 0.127 0.126 0.1250.1240.1230.122 0.1210.1200.1190.1182500.117 4243?D.2 Q345?01 2 3 45 67 8901.000 0.997 0.9940.9910.9880.985 0.9820.9790.9760.973100.971 0.968 0.9650.9620.9590

33、.956 0.9520.9490.9460.943200.940 0.937 0.9340.9300.9270.924 0.9200.9170.9130.909300.906 0.902 0.8980.8940.8900.886 0.8820.8780.8740.870400.867 0.864 0.8600.8570.8530.849 0.8450.8410.8370.833500.829 0.824 0.8190.8150.8100.805 0.8000.7940.7890.783600.777 0.771 0.7650.7590.7520.746 0.7390.7320.7250.718

34、700.710 0.703 0.6950.6880.6800.672 0.6640.6560.6480.640800.632 0.623 0.6150.6070.5990.591 0.5830.5740.5660.558900.550 0.542 0.5350.5270.5190.512 0.5040.4970.4890.482100 0.475 0.467 0.4600.4520.4450.438 0.4310.4240.4180.411110 0.405 0.398 0.3920.3860.3800.375 0.3690.3630.3580.352120 0.347 0.342 0.337

35、0.3320.3270.322 0.3180.3130.3090.304130 0.300 0.296 0.2920.2880.2840.280 0.2760.2720.2690.265140 0.261 0.258 0.2550.2510.2480.245 0.2420.2380.2350.232150 0.229 0.227 0.2240.2210.2180.216 0.2130.2100.2080.205160 0.203 0.201 0.1980.1960.1940.191 0.1890.1870.1850.183170 0.181 0.179 0.1770.1750.1730.171

36、 0.1690.1670.1650.163180 0.162 0.160 0.1580.1570.1550.153 0.1520.1500.1490.147190 0.146 0.144 0.1430.1410.1400.138 0.1370.1360.1340.133200 0.132 0.130 0.1290.1280.1270.126 0.1240.1230.1220.121210 0.120 0.119 0.1180.1160.1150.114 0.1130.1120.1110.110220 0.109 0.108 0.1070.1060.1060.105 0.1040.1030.10

37、10.101230 0.100 0.099 0.0980.0980.0970.096 0.0950.0940.0940.093240 0.092 0.091 0.0910.0900.0890.088 0.0880.0870.0860.0862500.0854344 44?E?E.1?nZK 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.4 1.65 1.68 1.73 1.79 1.88 2.00 2.14 2.31 0.6 1.87 1.91 1.97 2.04 2.13 2.25 2.38 2.54 0.8 2.06 2.12 2.19 2.27 2.36 2.48

38、2.61 2.75 12.24 2.30 2.38 2.47 2.57 2.68 2.81 2.96 22.97 3.07 3.18 3.29 3.41 3.54 3.68 3.82 33.55 3.68 3.81 3.95 4.08 4.23 4.38 4.53 144.05 4.20 4.35 4.50 4.66 4.82 4.98 5.14 0.4 1.79 1.81 1.83 1.86 1.92 2.02 2.15 2.31 0.6 2.04 2.06 2.09 2.14 2.20 2.28 2.40 2.54 0.8 2.26 2.29 2.33 2.37 2.44 2.52 2.6

39、3 2.76 12.46 2.49 2.54 2.59 2.66 2.74 2.85 2.97 23.27 3.33 3.39 3.46 3.54 3.63 3.74 3.85 33.91 3.99 4.07 4.15 4.24 4.34 4.45 4.56 244.47 4.55 4.64 4.74 4.84 4.95 5.06 5.18 0.4 1.85 1.86 1.88 1.90 1.94 2.02 2.15 2.31 0.6 2.12 2.13 2.15 2.18 2.23 2.30 2.41 2.55 0.8 2.35 2.37 2.39 2.42 2.47 2.54 2.64 2

40、.77 12.56 2.58 2.61 2.65 2.70 2.77 2.86 2.98 23.41 3.45 3.49 3.54 3.60 3.68 3.76 3.86 34.08 4.13 4.19 4.25 4.32 4.40 4.48 4.58 344.66 4.72 4.78 4.85 4.93 5.01 5.10 5.20 45?E.1nZK 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.4 1.89 1.89 1.90 1.92 1.95 2.03 2.15 2.31 0.6 2.16 2.17 2.18 2.20 2.24 2.31 2.41 2.51 0

41、.8 2.40 2.41 2.43 2.45 2.49 2.55 2.65 2.77 12.62 2.63 2.65 2.68 2.72 2.78 2.87 2.98 23.49 3.52 3.55 3.59 3.64 3.70 3.78 3.87 34.18 4.21 4.26 4.30 4.36 4.43 4.50 4.59 444.77 4.81 4.86 4.92 4.98 5.05 5.12 5.21 0.4 1.91 1.91 1.92 1.93 1.96 2.03 2.16 2.31 0.6 2.19 2.19 2.20 2.22 2.25 2.31 2.41 2.55 0.8

42、2.43 2.44 2.45 2.47 2.50 2.56 2.65 2.77 12.65 2.66 2.68 2.70 2.73 2.79 2.87 2.98 23.54 3.56 3.59 3.62 3.66 3.71 3.78 3.87 34.24 4.27 4.30 4.34 4.39 4.45 4.51 4.59 544.84 4.87 4.91 4.96 5.01 5.07 5.14 5.22?1?nZ?6maxl?K?E?N/mm2?I?mm4?1?2?1?h1?h?2?h2?h?maxl?l?l?mm?ab h?mm?k?15kN?m/rad?454612max6?l?2?I1

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44、.53 2.65 2.74 2.8l 2.87 0.4 1.52 1.57 1.60 1.61 1.61 1.61 1.61 0.6 1.70 1.76 1.80 1.82 1.82 1.83 1.83 0.8 1.84 1.92 1.97 1.99 2.00 2.01 2.01 1.0 1.95 2.04 2.10 2.13 2.15 2.16 2.17 2.0 2.24 2.39 2.49 2.55 2.60 2.63 2.65 3.0 2.39 2.58 2.71 2.79 2.85 2.90 2.93 44.0 2.52 2.73 2.88 2.98 3.05 3.10 3.15 0.

45、4 1.59 1.63 1.66 1.67 1.67 1.67 1.67 0.6 1.78 1.84 1.87 1.88 1.88 1.88 1.88 0.8 1.94 2.01 2.04 2.05 2.06 2.06 2.06 1.0 2.07 2.14 2.19 2.20 2.21 2.22 2.22 2.0 2.43 2.56 2.64 2.68 2.71 2.73 2.75 3.0 2.63 2.80 2.90 2.97 3.Ol 3.05 3.07 54.0 2.78 2.98 3.1l 3.19 3.25 3.29 3.32 4647?E.2nxK ax0.4 0.6 0.8 1.

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49、?3?24?3?5253?1?552?56 2.1?56 2.2?56 3?57 3.1?57 3.2?58 3.3?594?60 4.1?60 4.2?60 4.3?62 4.4?62 5?63 5.1?63 5.2?64 5.3?65 5.4?67 5.5?67 6?68 6.1?68 6.2?69 7?71 7.1?71 7.2?71 8?72 8.1?72 8.2?72 5354 54 8.3?72 8.4?72 9?73?A?74?D?75?E?76551?1.0.1?1.0.2?1.0.3?JGJ 300-2013?5.1.1?40m?JGJ 231-2010?6.1.1?24m?24m?1.0.4?55562?2.1?2.1.5?2.8m?3.0m?2.1.10?2.1.11?2.1.122.1.14?JGJ 300-2013?JGJ 300-2013?2.1.5?2.1.11?2.1.16?2.1.16?2.2?2?GB/T 20001.2?563?3.1?3.1.1?1?t?10mm?a?10mm图面LH侧(1IflJ立ooo平正583.1.5?0.6m?0.3m?3.1.6?A?3.2?3.2.1?3.2.2?Q235B?GB 50017-2003?3.3.3?Q235A?3.2.3?GB/T 21835-2008?GB/T 3091-2008?3.24mm?