建築構造用冷間ロール成形角形鋼管 （BCR295）

1 2017 29 3 1 1 1 1 bcr295 1. bcr295 2. 150 6 550 25 2 2 bcr295 1. 2. 2 (1) 3 C+Mn/6+Si/24+Ni/40+Cr/5+Mo/4+V/14 3 B C R 2 9 5 (2)

2 CM 4 CM C+Si/30+Mn/20+Cu/20+Ni/60+Cr/20+Mo/15+V/ 10+5B 4 B C R 2 9 5 3 5 5 mm (N/mm2) (N/mm2 bcr295 6 12 295 400 550 JIS Z 2241 5 23 12 16 295 445 90 16 22 27 22 25 33 8 1 5 JIS Z 8401( ) 12mm 6 3 6 C B C R 2 9 5 0 27 4 8 7 8)

3 50mm 7 3mm 9 1/1500 9 1/1250 (mm)/1000 mm 6mm 16mm 16mm 25mm 25mm 1. 2. 3. 4. 5 8 mm mm 6mm 25mm 1. 1 R 2. 1 65 3. 8 1 (1) (2) (1) (2) R65 45 R 6 JIS G 0404 8 JIS G 0320 1 (1)

4 1 JIS Z 2241 5 (2) JIS Z 2241 (1) JIS Z 3121 5 1 (2) JIS Z 3121 12mm (1) 1 JIS Z 2242 1/4 7 1/4 2 (2) JIS Z 2242 1 1 1 50 2 1 3 JIS G 0582 JIS Z 3060 1/4 8 JIS G 0583 (1) JIS G 0404 (2) (3)

5 (4) JIS G 0404 1 9 1 2 (1) (2) 2 Ceq PCM 2 1 (3) (4) 0 C 1 2 10 5g JIS G 1228 (1) 14% 60 C 500ml 5g 14% 400ml 60 C 14% 10% 300ml 5g 10% 150ml (2)

6 47mm m (3) 300ml CuSO4 5H2O 1g + K2SO4 10g + H2SO4 20ml 1h 150ml 5min 1000ml N (4) 2 (1) (2) 47mm m (3) Na2B4O7 Na2CO3 K2CO3=4:3:3 700 C 5min 900 C 10min 5ml HCl H2O2 H2O=4 1 5 10ml 50ml 100ml 21g/l 197ml 28g/l 203m pH 5ml CH3C6H4SO2 NClNa 3H2O 5g 1000ml 2ml 20 25 C 5mi 1 3 5 C20 18O2N4 50ml 2 10ml 5min 1 3 5 C6H5NN C(CH3) CH2CO 1000ml 10ml 6 10 min 540nm (4)

7 2 11 5 500ml 14 - 60 C 47mm m 300ml CuSO4 5 2O 1g K2SO4 10g 2SO4 20ml 1hr . 150ml 5min 2O . 12 1 1 1 3 JIS Z 8401 3 (H+ ) kg/m mm H,B mm (1/4 )

8 2 8 3 R 2 3 bcr295 FA FB FC FD F/23533 F/23537 F/23548 295N/mm2 90 90 90 90 HBtYYXX 13 JIS G 0404 JIS G 0320 JIS Z 2241 JIS Z 3121 JIS Z 2242 JIS G 0582 JIS Z 3060 JIS G 0583 JIS G 1228 - JIS Z 8401 14 bcr295 cm2 g/m lx=ly cm4 ix=iy cm Zx=Zy cm3 Zpx=Zpy cm3 150 150 150 150 150 150 6 9 12 1,130 1,540 1,850 150 205 247 178 248 307 FA FA FA 175 175 175 175 175 175 6 9 12 1,840 2,550 3,120 210 291 356 246 348 437 FA FA FA 200 200 200 200 200 200 200 200 200 200 6 8 9 12 16 2,800 3,570 3,920 4,860 5,860 280 357 392 486 586 327 421 465 588 728 FC FA FA FA FA 250 250 250 250 250 250 250 250 250 250 250 250 250 250 6 8 9 12 14 16 19 111 128 5,620 7,230 7,980 10,100 11,300 12,400 13.

9 900 450 578 639 805 903 992 1,110 521 676 750 959 1,090 1,210 1,370 FC FB FA FA FA FA FA 300 300 300 300 300 300 300 300 300 300 300 300 300 300 6 8 9 12 14 16 19 105 120 136 158 9,890 12,800 14,200 18,100 20,400 22,600 25,500 660 853 946 1,200 1,360 1,510 1,700 760 991 1,100 1,420 1,620 1,810 2,070 FD FC FC FA FA FA FA 350 350 350 350 350 350 350 350 350 350 350 350 9 12 14 16 19 22 123 142 161 188 214 23,000 29,400 33,400 37,200 42,400 47,100 1,310 1,680 1,910 2,130 2,420 2,690 1,520 1,970 2,260 2,530 2,910 3,270 FC FA FA FA FA FA 400 400 400 400 400 400 400 400 400 400 400 400 400 400 9 12 14 16 19 22 25 108 142 164 186 218 248 278 34,800 44,800 51,100 57,100 65,400 73,000 80,00