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ADDITIONAL DATA
146
1. Internal corrosion cannot occur in sealed closed structural as water is excluded and oxygen unreplenished. Only
external surface needs protection.
2. RHS/SHS have a smooth continuous profile with non re-entrant corners which do not trap dirt and water.
RHS/SHS do not require stripe coating as they have no edges and sharp corners.
Two of the original 'Tubewrights' erected in 1954 at Stamford Bridge, Chelsea, were replaced
in 1975, taken down and the used sections were cut and despatched to the Corby Works of
British Steel for examination.
Of the 139.7mm o.d. CHS was cut lengthwise to expose the internal surfaces
for examination. Little evidence of internal corrosion was found other than a discolouration of
the surface caused by the oxygen and moisture in the entrapped air; much of the original mill
scale was still visible. A light rust in the centre of the sample developed after the tube was cut
open for examination.
Of the 139.7mm o.d. CHS incorporating an intermediate flanged joint was
examined and the condition of the internal flange face, which had been enclosed and thus
hermatically sealed by welding to the CHS, was still comparatively bright with the marking-off
lines clearly visible.
The above report is from British Steel Publication No. TD 347/10E/91 titled – CORROSION THE CASE for
STRUCTURALHOLLOW SECTIONS.
The following historical examples demonstrate that corrosion will not occur on internal surface of sealed hollow
sections.
Certain of the examination referred to have also indicated that, even when weld seams are not perfectly sealed or
small holes have been made in the section, traces of superficial rust only can be detected in the immediate
neighbourhood of the appropriate welds or holes.
INTERNAL CORROSION –Acase study
Sample No 1.
Sample No 2.
The above table is reprinted from CIDECT publication 'The Hollow Section' No.6, 1982, and refers to case studies that demonstrate the non-
occurrence of Internal Corrosion.
Conclusion: Hollow Sections that are sealed by the combination of end details and structural quality welding do not
corrode internally.
Corrosion Resistant Properties
Application Location Comment Period of service Examinationof sample (years)
Trolley Pittsburg At least 22,000 such poles 40-50 Thicknesses of section wallsbus poles USA were installed. Some 18,000 still within original manufacturing
still in service today tolerance
Lighting Daylon, No corrosion damage visible 59 Internal surfaces still boreColumn Ohio, USA on any column in the series original mill scale,
No pitting of steel
Davits of Application subject to 37 No internal corrosionocean liner aggressive marineSSAquitania environment. Two davits
donated for research whenship scrapped
Roof trusses Hiltrup, Extremely aggressive 9 No internal corrosion.at pickling Westphalia industrial environment Original mill scale visibleplant
Italy Tubular lattices available 25-30 No internal corrosion detected
Sample 1
Sample 2
SA
FE
LO
AD
SIN
“KN
”F
OR
SIN
GLE
RH
SS
TR
UT
DIF
FE
RE
NT
L/R
min
RA
TIO
SM
AT
ER
IAL
TA
TA
ST
RU
CT
UR
AG
RA
DE
YS
T-3
10
,IS
-49
23
147
SH
SS
IZE
AR
EA
Ryy
Leff
2m
SA
FE
Leff
3m
SA
FE
4m
SA
FE
5m
SA
FE
6m
SA
FE
7m
SA
FE
8m
SA
FE
Leff
Leff
Leff
Leff
Leff
Ryy
LO
AD
Ryy
LO
AD
Ryy
LO
AD
Ryy
LO
AD
Ryy
LO
AD
Ryy
LO
AD
Ryy
LO
AD
50X
25X
2174
10.1
0198.0
24.9
8
50X
25X
2.6
346
9.9
0202.0
29.5
5
50X
25X
3.2
413
9.6
0208.3
310.8
8
50X
25X
4495
9.2
0217.3
911.7
7
60X
40X
2.6
476
15.9
0125.7
929.9
6188.6
814.9
4
60X
40X
2.9
525
15.8
0126.5
832.7
6189.8
716.2
9
60X
40X
3.6
635
15.5
0129.0
338.5
3193.5
519.0
1
60X
40X
4.5
767
15.1
0132.4
544.7
0198.6
821.7
8
66X
33X
2.6
470
13.4
0149.2
522.3
0223.8
810.6
3
66X
33X
2.9
519
13.3
0150.3
824.3
0225.5
611.6
5
66X
33X
3.6
628
12.9
0155.0
427.9
3232.5
613.4
9
66X
33X
4.5
758
12.5
0160.0
031.8
4240.0
015.1
6
80X
40X
2.6
580
16.5
0121.2
138.3
7181.8
219.4
0
80X
40X
3.2
701
16.2
0123.4
645.2
7185.1
922.7
4
80X
40X
4855
15.9
0125.7
953.8
2188.6
826.8
4
80X
40X
4.8
1001
15.5
0129.0
360.7
4193.5
529.9
7
96X
48X
3.2
854
19.7
0101.5
273.0
0152.2
839.1
6203.0
523.3
9
96X
48X
41047
19.4
0103.0
987.8
5154.6
446.7
8206.1
928.0
2
96X
48X
4.8
1231
19.0
0105.2
6100.6
2157.8
953.0
0210.5
331.8
1
122X
61X
3.6
1232
25.3
079.0
5140.9
7118.5
884.3
0158.1
052.9
1197.6
335.3
7237.1
525.3
4
122X
61X
4.5
1514
24.9
080.3
2170.4
0120.4
8100.9
3160.6
463.2
0200.8
042.1
5240.9
629.9
9
122X
61X
5.4
1785
24.5
081.6
3197.6
3122.4
5116.5
4163.2
772.6
4204.0
848.5
2244.9
033.9
5
145X
82X
4.8
2028
33.6
059.5
2291.3
689.2
9202.8
0119.0
5137.8
1148.8
196.7
6178.5
770.1
1208.3
353.4
0238.1
041.3
3
SH
SS
IZE
AR
EA
Ryy
Leff
2m
SA
FE
3S
AF
E4
SA
FE
5S
AF
E6
SA
FE
Leff
mL
eff
mL
eff
mL
eff
mR
yy
LO
AD
Ryy
LO
AD
Ryy
LO
AD
Ryy
LO
AD
Ryy
LO
AD
145X
82X
5.4
2260
33.3
060.0
6322.9
890.0
9223.5
0120.1
2151.2
3150.1
5106.0
5180.1
876.7
2
172X
92X
4.8
2383
38.2
052.3
6366.2
778.5
3274.5
2104.7
1196.0
9130.8
9141.5
0157.0
7103.5
8
172X
92X
5.4
2659
37.9
052.7
7407.1
579.1
6303.8
3105.5
4216.6
0131.9
3155.9
5158.3
1113.9
2
200X
100X
42295
42.3
047.2
8367.8
070.9
2290.5
994.5
6214.6
4118.2
0157.8
9141.8
4119.1
0
200X
100X
52836
41.9
047.7
3452.9
771.6
0356.2
195.4
7262.1
6119.3
3191.9
1143.2
0144.8
7
200X
100X
63363
41.4
048.3
1534.8
172.4
6418.0
496.6
2306.2
3120.7
7223.5
0144.9
3168.3
0
200X
100X
84379
40.5
049.3
8690.7
574.0
7533.7
598.7
7387.4
6123.4
6282.8
0148.1
5210.6
8
220X
140X
42775
58.4
034.2
5483.3
451.3
7430.3
568.4
9361.4
785.6
2291.7
6102.7
4233.8
2
220X
140X
53436
58.0
034.4
8597.7
551.7
2531.1
668.9
7445.1
486.2
1358.4
1103.4
5287.0
8
220X
140X
64083
57.5
034.7
8709.2
052.1
7628.6
069.5
7525.2
986.9
6421.6
1104.3
5337.4
7
220X
140X
85339
56.6
035.3
4924.7
053.0
0815.7
770.6
7678.0
288.3
4540.9
7106.0
1432.4
2
240X
120X
42775
51.1
039.1
4471.1
358.7
1401.8
478.2
8320.7
497.8
5248.5
9117.4
2193.0
9
240X
120X
53436
50.7
039.4
5582.3
959.1
7495.3
378.9
0393.9
698.6
2304.6
2118.3
4235.9
0
240X
120X
64083
50.2
039.8
4690.6
159.7
6585.2
479.6
8463.3
399.6
0357.1
7119.5
2275.5
1
240X
120X
85339
49.3
040.5
7898.6
560.8
5756.6
581.1
4594.8
2101.4
2456.9
1121.7
0351.3
5
260X
180X
65043
74.0
027.0
3905.1
540.5
4849.0
054.0
5763.1
367.5
7663.9
081.0
8562.2
3
260X
180X
86619
73.1
027.3
61186.9
241.0
41110.3
554.7
2995.4
568.4
0863.1
282.0
8728.6
8
260X
180X
10
8143
72.2
027.7
01458.8
241.5
51361.0
155.4
01216.8
769.2
51051.4
483.1
0884.7
9
260X
180X
12
9614
71.3
028.0
51720.6
642.0
81600.8
256.1
01427.2
870.1
31228.7
784.1
51030.5
0
300X
150X
65163
63.5
031.5
0912.0
647.2
4827.6
762.9
9715.1
478.7
4593.1
894.4
9483.3
3
300X
150X
86779
62.6
031.9
51194.7
747.9
21081.2
063.9
0929.7
679.8
7767.3
395.8
5623.5
6
300X
150X
10
8343
61.7
032.4
11466.9
248.6
21323.6
464.8
31132.6
181.0
4930.6
497.2
4753.4
3
300X
150X
12
9854
60.8
032.8
91728.3
449.3
41554.8
665.7
91323.5
582.2
41082.6
498.6
8872.8
6
300X
200X
65763
82.9
024.1
31042.7
436.1
9993.7
248.2
5916.8
960.3
1821.4
072.3
8717.1
2
300X
200X
87579
82.0
024.3
91370.3
236.5
91304.1
448.7
81200.9
960.9
81072.7
173.1
7934.0
7
300X
200X
10
9343
81.1
024.6
61688.0
036.9
91604.2
749.3
21474.4
561.6
51312.8
973.9
81140.0
9
300X
200X
12
11054
80.2
024.9
41995.5
937.4
11893.9
349.8
81737.1
362.3
41541.8
574.8
11335.1
1
148
SA
FE
LO
AD
SIN
“KN
”F
OR
SIN
GLE
RH
SS
TR
UT
DIF
FE
RE
NT
L/R
min
RA
TIO
SM
AT
ER
IAL
TA
TA
ST
RU
CT
UR
AG
RA
DE
YS
T-3
10
,IS
-49
23
NO
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AF
EL
OA
DS
CA
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UL
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ED
FO
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/RY
YU
PT
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.
2)
SA
FE
LO
AD
SA
RE
CA
LC
UL
AT
ED
CO
NS
IDE
RIN
GU
NS
UP
PO
RT
ED
AB
OU
TM
INO
RA
XIS
149
SH
SS
IZE
AR
EA
Ryy
Leff
7m
SA
FE
8S
AF
E9
SA
FE
10
SA
FE
12
SA
FE
Leff
mL
eff
mL
eff
mL
eff
mR
yy
LO
AD
Ryy
LO
AD
Ryy
LO
AD
Ryy
LO
AD
Ryy
LO
AD
145X
82X
5.4
2260
33.3
0210.2
158.6
2240.2
445.0
9
172X
92X
4.8
2383
38.2
0183.2
578.7
0209.4
262.2
3235.6
049.7
6
172X
92X
5.4
2659
37.9
0184.7
086.6
6211.0
868.2
7237.4
754.5
3
200X
100X
42295
42.3
0165.4
891.3
6189.1
371.7
5212.7
757.7
7236.4
147.5
5
200X
100X
52836
41.9
0167.0
6111.1
0190.9
387.1
2214.8
069.6
5238.6
657.4
8
200X
100X
63363
41.4
0169.0
8129.0
3193.2
4100.9
9217.3
979.9
8241.5
566.2
2
200X
100X
84379
40.5
0172.8
4161.4
3197.5
3125.8
6222.2
299.7
4246.9
168.1
2
220X
140X
42775
58.4
0119.8
6186.3
1136.9
9152.9
3154.1
1124.7
2171.2
3104.0
8205.4
874.6
6
220X
140X
53436
58.0
0120.6
9228.5
5137.9
3187.0
8155.1
7152.6
1172.4
1127.2
5206.9
091.4
7
220X
140X
64083
57.5
0121.7
4268.5
9139.1
3218.8
8156.5
2178.5
9173.9
1148.7
6208.7
0107.2
2
220X
140X
85339
56.6
0123.6
7343.9
8141.3
4278.6
7159.0
1226.8
8176.6
8188.6
2212.0
1135.5
9
240X
120X
42775
51.1
0136.9
9152.9
3156.5
6121.3
3176.1
398.6
5195.6
981.2
8234.8
358.3
7
240X
120X
53436
50.7
0138.0
7186.7
6157.7
9148.1
1177.5
1120.2
4197.2
499.0
5236.6
971.0
0
240X
120X
64083
50.2
0139.4
4217.9
9159.3
6172.7
9179.2
8139.9
9199.2
0115.3
0239.0
482.4
4
240X
120X
85339
49.3
0141.9
9276.6
0162.2
7219.3
9182.5
6177.4
3202.8
4146.4
6243.4
1103.1
4
260X
180X
65043
74.0
094.5
9471.4
5108.1
1397.8
5121.6
2332.1
6135.1
4284.4
5162.1
6207.4
4
260X
180X
86619
73.1
095.7
6609.5
4109.4
4513.3
8123.1
2429.0
2136.8
0365.6
4164.1
6266.9
9
260X
180X
10
8143
72.2
096.9
5738.2
2110.8
0620.4
7124.6
5519.0
5138.5
0440.1
1166.2
0321.8
0
260X
180X
12
9614
71.3
098.1
8857.4
5112.2
0719.1
1126.2
3602.2
3140.2
5508.0
9168.3
0371.8
6
300X
150X
65163
63.5
0110.2
4396.3
3125.9
8324.2
9141.7
3268.2
7157.4
8223.3
5188.9
8161.6
4
300X
150X
86779
62.6
0111.8
2509.6
4127.8
0417.2
0143.7
7343.9
5159.7
4285.5
8191.6
9206.7
1
300X
150X
10
8343
61.7
0113.4
5613.6
1129.6
6502.5
7145.8
7412.8
1162.0
7343.4
8194.4
9247.4
0
300X
150X
12
9854
60.8
0115.1
3708.1
9131.5
8580.3
5148.0
3474.8
1164.4
7396.2
3197.3
7283.6
9
300X
200X
65763
82.9
084.4
4615.4
096.5
0525.5
7108.5
6452.0
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3383.5
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5289.0
1
300X
200X
87579
82.0
085.3
7799.4
997.5
6681.5
6109.7
6585.4
3121.9
5497.4
4146.3
4372.8
5
300X
20010
9343
81.1
086.3
1973.1
898.6
4828.0
5110.9
7710.3
1123.3
0604.3
7147.9
7450.5
3
300X
200X
12
11054
80.2
087.2
81136.4
199.7
5965.0
1112.2
2826.6
2124.6
9704.3
4149.6
3522.0
2
SA
FE
LO
AD
SIN
“KN
”F
OR
SIN
GLE
RH
SS
TR
UT
DIF
FE
RE
NT
L/R
min
RA
TIO
SM
AT
ER
IAL
TA
TA
ST
RU
CT
UR
AG
RA
DE
YS
T-3
10
,IS
-49
23
SH
SS
IZE
AR
EA
Ryy
Leff
2m
SA
FE
3m
SA
FE
4m
SA
FE
5m
SA
FE
6m
SA
FE
7m
SA
FE
Leff
Leff
Leff
Leff
Leff
Ryy
LO
AD
Ryy
LO
AD
Ryy
LO
AD
Ryy
LO
AD
Ryy
LO
AD
Ryy
LO
AD
25X
25X
2174
9.2
0217.3
94.4
0
25X
25X
2.6
216
8.9
0224.7
24.8
7
25X
25X
3.2
253
8.6
0232.5
65.4
4
32X
32X
2230
12.1
0165.2
99.1
7247.9
3
32X
32X
2.6
288
11.8
0169.4
911.0
0254.2
4
32X
32X
3.2
342
11.5
0173.9
112.4
6260.8
7
38X
38X
2.6
351
14.3
0139.8
618.6
4209.7
99.1
4
38X
38X
3.2
419
14.0
0142.8
621.4
9214.2
910.3
6
38X
38X
4503
13.6
0147.0
624.5
3220.5
911.5
4
40X
40X
2.6
372
15.1
0132.4
521.6
8198.6
810.5
6
40X
40X
3.2
445
14.8
0135.1
425.1
0202.7
012.2
2
40X
40X
4535
14.4
0138.8
928.7
7208.3
314.0
9
50X
50X
2.6
476
19.2
0104.1
739.4
3156.2
520.8
8208.3
312.5
3
50X
50X
2.9
525
19.0
0105.2
642.9
1157.8
922.6
0210.5
313.5
7
50X
50X
3.6
635
18.7
0106.9
550.8
3160.4
326.5
6213.9
015.7
7
50X
50X
4.5
767
18.2
0109.8
959.1
4164.8
430.7
3219.7
817.6
9
60X
60X
2.6
580
23.3
085.8
460.8
0128.7
635.3
1171.6
721.6
5214.5
915.1
5
60X
60X
3.2
701
23.0
086.9
672.3
9130.4
341.8
5173.9
125.5
4217.3
916.6
7
60X
60X
4855
22.6
088.5
086.4
5132.7
449.6
6176.9
930.1
0221.2
419.5
6
60X
60X
4.8
1001
22.2
090.0
998.9
9135.1
456.4
6180.1
833.9
8225.2
322.5
0
72X
72X
3.2
854
27.9
071.6
8107.1
5107.5
367.8
7143.3
743.5
4179.2
129.3
1215.0
520.9
1
72X
72X
41047
27.5
072.7
3129.7
3109.0
981.5
7145.4
552.0
6181.8
235.0
3218.1
824.6
5
72X
72X
4.8
1231
27.1
073.8
0150.5
5110.7
093.9
2147.6
059.6
3184.5
040.1
9221.4
028.1
4
80X
80X
3.2
957
31.1
064.3
1130.6
796.4
687.3
2128.6
258.3
5160.7
739.9
0192.9
328.8
3225.0
821.5
2
80X
80X
41175
30.7
065.1
5158.9
597.7
2105.4
4130.2
970.2
6162.8
748.0
0195.4
434.5
1228.0
126.0
8
80X
80X
4.8
1385
30.4
065.7
9186.0
398.6
8122.6
8131.5
881.5
7164.4
755.6
9197.3
739.8
7230.2
630.4
0
MA
TE
RIA
LT
AT
AS
TR
UC
TU
RA
GR
AD
EY
ST
-31
0,
IS-4
92
3
150
SA
FE
LO
AD
SIN
“KN
”F
OR
SIN
GLE
SH
SS
TR
UT
DIF
FE
RE
NT
L/R
min
RA
TIO
S
151
MA
TE
RIA
LT
AT
AS
TR
UC
TU
RA
GR
AD
EY
ST
-31
0,
IS-4
92
3
SA
FE
LO
AD
SIN
“KN
”F
OR
SIN
GLE
SH
SS
TR
UT
DIF
FE
RE
NT
L/R
min
RA
TIO
S
SH
SS
IZE
AR
EA
Ryy
Leff
2m
SA
FE
3m
SA
FE
4m
SA
FE
5m
SA
FE
6m
SA
FE
Leff
Leff
Leff
Leff
Ryy
LO
AD
Ryy
LO
AD
Ryy
LO
AD
Ryy
LO
AD
Ryy
LO
AD
91.5
X91.5
X3.6
1232
35.6
056.1
8182.7
784.2
7131.8
5112.3
691.9
6140.4
564.9
6168.5
447.5
4
91.5
X91.5
X4.5
1514
35.2
056.8
2223.2
585.2
3160.0
0113.6
4111.0
7142.0
578.3
8170.4
557.2
6
91.5
X91.5
X5.4
1785
34.8
057.4
7261.5
786.2
1186.1
9114.9
4128.6
2143.6
890.6
7172.4
166.1
1
100X
100X
41495
38.9
051.4
1231.7
677.1
2175.3
9102.8
3125.8
4128.5
391.2
3154.2
467.0
9
100X
100X
51836
38.4
052.0
8282.9
078.1
3212.6
3104.1
7152.0
8130.2
1109.8
9156.2
580.5
5
100X
100X
62163
37.9
052.7
7331.2
079.1
6247.1
6105.5
4176.2
0131.9
3126.8
6158.3
192.6
7
113.5
X113.5
X4.8
2028
44.0
045.4
5329.4
668.1
8265.1
190.9
1198.5
6113.6
4148.7
8136.3
611
2.6
5
113.5
X113.5
X5.4
2260
43.8
045.6
6366.5
868.4
9294.3
991.3
2220.1
5114.1
6164.6
3136.9
9124.5
5
132X
132X
4.8
2383
51.6
038.7
6405.3
958.1
4346.9
877.5
2278.1
596.9
0216.1
9116.2
8168.5
3
132X
132X
5.4
2659
51.3
038.9
9451.8
058.4
8385.9
077.9
7308.5
597.4
7239.4
2116.9
6186.2
4
150X
150X
42295
59.3
033.7
3400.8
150.5
9358.4
267.4
5302.5
384.3
2245.4
6101.1
8196.9
6
150X
150X
52836
58.9
033.9
6494.7
150.9
3441.5
467.9
1371.8
984.8
9301.0
5101.8
7241.4
4
150X
150X
63363
58.4
034.2
5585.7
651.3
7521.5
468.4
9438.0
785.6
2353.5
8102.7
4283.3
7
150X
150X
84379
57.4
034.8
4760.3
752.2
6673.6
269.6
9562.5
787.1
1451.2
5104.5
3361.1
4
180X
180X
42775
71.6
027.9
3496.8
241.9
0462.6
555.8
7412.8
969.8
3355.9
083.8
0298.8
2
180X
180X
53436
71.1
028.1
3614.8
242.1
9571.6
456.2
6509.3
470.3
2438.1
484.3
9367.1
6
180X
180X
64083
70.6
028.3
3730.1
942.4
9677.8
156.6
6602.9
870.8
2517.5
984.9
9432.8
8
180X
180X
85339
69.7
028.6
9953.8
343.0
4882.8
057.3
9782.9
971.7
4669.4
986.0
8557.8
4
220X
220X
65043
87.0
022.9
9915.3
334.4
8877.3
145.9
8749.5
557.4
7739.0
068.9
7653.3
3
220X
220X
86619
86.0
023.2
61200.5
034.8
81149.0
946.5
1978.8
458.1
4963.7
669.7
7849.5
4
220X
220X
10
8143
85.0
023.5
31475.8
035.2
91410.6
647.0
61197.9
858.8
21177.8
670.5
91035.1
2
220X
220X
12
9614
84.1
023.7
81741.1
935.6
71662.2
247.5
61407.6
159.4
51382.1
671.3
41211.2
2
250X
250X
65763
99.2
020.1
61054.1
630.2
41024.5
640.3
2971.7
250.4
0901.5
460.4
8819.9
3
250X
250X
87579
98.2
020.3
71385.5
730.5
51345.3
140.7
31274.1
850.9
21180.1
861.1
01071.2
9
250X
250X
10
9343
97.3
020.5
51707.1
830.8
31656.0
541.1
11566.5
251.3
91448.7
061.6
61312.7
2
250X
250X
12
11054
96.3
020.7
72018.6
331.1
51956.1
441.5
41847.7
451.9
21705.7
562.3
11542.5
0
SH
SS
IZE
AR
EA
Ryy
Leff
7m
SA
FE
SA
FE
SA
FE
SA
FE
SA
FE
Leff
8m
Leff
9m
Leff
10m
Leff
12m
Ryy
LO
AD
Ryy
LO
AD
Ryy
LO
AD
Ryy
LO
AD
Ryy
LO
AD
91.5
X91.5
X3.6
1232
35.6
0196.6
335.7
4224.7
227.7
5
91.5
X91.5
X4.5
1514
35.2
0198.8
642.9
1227.2
733.7
2
91.5
X91.5
X5.4
1785
34.8
0201.1
549.5
7229.8
939.2
9
100X
100X
41495
38.9
0179.9
550.8
6205.6
640.1
7231.3
632.4
8
100X
100X
51836
38.4
0182.2
961.1
6208.3
348.3
5234.3
838.7
9
100X
100X
62163
37.9
0184.7
070.4
9211.0
855.5
4237.4
744.3
6
113.5
X113.5
X4.8
2028
44.0
0159.0
986.1
0181.8
267.8
5204.5
554.9
4227.2
745.1
7
113.5
X113.5
X5.4
2260
43.8
0159.8
295.1
3182.6
575.0
4205.4
860.8
0228.3
150.1
0
132X
132X
4.8
2383
51.6
0135.6
6133.5
4155.0
4106.0
0174.4
286.3
4193.8
071.1
6232.5
651.2
1
132X
132X
5.4
2659
51.3
0136.4
5147.5
3155.9
5117.0
7175.4
495.2
6194.9
378.4
9233.9
256.4
1
150X
150X
42295
59.3
0118.0
4158.2
5134.9
1129.8
2151.7
7105.8
3168.6
388.4
6202.3
663.1
8
150X
150X
52836
58.9
0118.8
5193.2
9135.8
2158.6
0152.8
0129.3
2169.7
8108.0
2203.7
477.2
9
150X
150X
63363
58.4
0119.8
6225.7
8136.9
9185.3
3154.1
1151.1
5171.2
3126.1
4205.4
890.4
8
150X
150X
84379
57.4
0121.9
5287.4
1139.3
7234.0
1156.7
9190.9
4174.2
2159.0
2209.0
6114.6
8
180X
180X
42775
71.6
097.7
7248.8
7111.7
3208.8
7125.7
0174.8
6139.6
6147.7
3167.6
0108.1
2
180X
180X
53436
71.1
098.4
5305.3
1112.5
2255.9
2126.5
8214.3
8140.6
5180.7
7168.7
8132.2
5
180X
180X
64083
70.6
099.1
5359.3
8113.3
1300.8
6127.4
8252.1
9141.6
4212.3
7169.9
7155.2
0
180X
180X
85339
69.7
0100.4
3462.2
0114.7
8385.6
0129.1
2323.6
1143.4
7271.8
4172.1
7198.2
6
220X
220X
65043
87.0
080.4
6566.6
191.9
5487.4
3103.4
5421.3
5114.9
4363.3
9137.9
3274.5
8
220X
220X
86619
86.0
081.4
0735.0
293.0
2631.2
7104.6
5545.0
7116.2
8468.1
0139.5
3352.9
6
220X
220X
10
8143
85.0
082.3
5893.3
494.1
2765.9
2105.8
8660.5
4117.6
5564.7
4141.1
8425.8
3
220X
220X
12
9614
84.1
083.2
31042.8
595.1
2892.6
6107.0
2768.9
7118.9
1654.6
6142.6
9494.0
4
250X
250X
65763
99.2
070.5
6732.7
880.6
5646.0
190.7
3565.5
2100.8
1496.7
3120.9
7382.2
2
250X
250X
87579
98.2
071.2
8955.5
381.4
7840.8
791.6
5735.3
2101.8
3645.4
8122.2
0496.1
2
250X
250X
10
9343
97.3
071.9
411
68.6
882.2
21026.7
292.5
0896.9
6102.7
7786.9
1123.3
3604.2
0
250X
250X
12
11054
96.3
072.6
91370.3
283.0
71201.5
393.4
61048.4
8103.8
4919.2
3124.6
1704.9
4
NO
TE
:1
)S
AF
EL
OA
DS
CA
LC
UL
AT
ED
FO
RL
/RY
YU
PT
O2
50
.
2)
SA
FE
LO
AD
SA
RE
CA
LC
UL
AT
ED
CO
NS
IDE
RIN
GU
NS
UP
PO
RT
ED
AB
OU
TM
INO
RA
XIS
152
MA
TE
RIA
LT
AT
AS
TR
UC
TU
RA
GR
AD
EY
ST
-31
0,
IS-4
92
3
SA
FE
LO
AD
SIN
“KN
”F
OR
SIN
GLE
SH
SS
TR
UT
DIF
FE
RE
NT
L/R
min
RA
TIO
S
SAFE LOAD CAPACITIES OF "TATA" SINGLE SHSMATERIAL: IS : 4923, GRADE : 310
153
SHS 25X25X3.2 253 47.06 3.01 3.01 1.51 1.51 0.31 0.31 15.69 15.69
SHS 38X38X3.2 419 77.93 4.90 4.90 4.30 4.30 0.88 0.88 25.98 25.98
SHS 38X38X4.0 503 93.56 4.76 4.76 4.87 4.87 1.00 1.00 31.19 31.19
SHS 49.5X49.5X2.9 525 97.65 6.58 6.58 7.60 7.60 1.56 1.56 32.55 32.55
SHS 49X49X3.6 635 118.11 6.47 6.47 8.86 8.86 1.82 1.82 39.37 39.37
SHS 49X49X4.5 767 142.66 6.30 6.30 10.20 10.20 2.09 2.09 47.55 47.55
SHS 72X72X3.2 854 158.84 9.67 9.67 18.42 18.42 3.78 3.78 52.95 52.95
SHS 72X72X4.0 1047 194.74 9.62 9.62 21.95 21.95 4.50 4.50 64.91 64.91
SHS 72X72X4.8 1231 228.97 9.48 9.48 25.09 25.09 5.14 5.14 76.32 76.32
SHS 91.5X91.5X3.6 1232 229.15 12.46 12.46 34.21 34.21 7.01 7.01 76.38 76.38
SHS 91.5X91.5X4.5 1514 281.60 12.32 12.32 41.00 41.00 8.41 8.41 93.87 93.87
SHS 91.5X91.5X5.4 1785 332.01 12.18 12.18 47.14 47.14 9.66 9.66 110.67 110.67
SHS 113.5X113.5X4.8 2028 377.21 15.40 15.40 69.30 69.30 14.21 14.21 125.74 125.74
SHS 113.5X113.5X5.4 2260 420.36 15.33 15.33 76.23 76.23 15.63 15.63 140.12 140.12
SHS 132X132X4.8 2383 443.24 18.06 18.06 96.12 96.12 19.70 19.70 147.75 147.75
SHS 132X132X5.4 2660 494.76 17.95 17.95 106.08 106.08 21.75 21.75 164.92 164.92
SHS 150X150X4.0 2295 426.87 20.76 20.76 107.71 107.71 22.08 22.08 142.29 142.29
SHS 150X150X5.0 2836 527.50 20.62 20.62 130.95 130.95 26.84 26.84 175.83 175.83
SHS 150X150X6.0 3363 625.52 20.44 20.44 152.79 152.79 31.32 31.32 208.51 208.51
SHS 150X150X8.0 4379 814.49 20.09 20.09 192.40 192.40 39.44 39.44 271.50 271.50
SHS 180X180X4.0 2775 516.15 25.06 25.06 157.97 157.97 32.38 32.38 172.05 172.05
SHS 180X180X5.0 3436 639.10 24.89 24.89 192.99 192.99 39.56 39.56 213.03 213.03
SHS 180X180X6.0 4083 759.44 24.71 24.71 226.28 226.28 46.39 46.39 253.15 253.15
SHS 180X180X8.0 5339 993.05 24.40 24.40 287.86 287.86 59.01 59.01 331.02 331.02
SHS 220X220X6.0 5043 938.00 30.45 30.45 346.67 346.67 71.07 71.07 312.67 312.67
SHS 220X220X8.0 6619 1231.13 30.10 30.10 445.00 445.00 91.23 91.23 410.38 410.38
SHS 220X220X10 8143 1514.60 29.75 29.75 535.20 535.20 109.72 109.72 504.87 504.87
SHS 220X220X12 9614 1788.20 29.44 29.44 617.55 617.55 126.60 126.60 596.07 596.07
SHS 250X250X6.0 5763 1071.92 34.72 34.72 453.76 453.76 93.02 93.02 357.31 357.31
SHS 250X250X8.0 7579 1409.69 34.37 34.37 585.25 585.25 119.98 119.98 469.90 469.90
SHS 250X250X10 9343 1737.80 34.06 34.06 707.38 707.38 145.01 145.01 579.27 579.27
SHS 250X250X12 11054 2056.04 33.71 33.71 802.38 802.38 164.49 164.49 685.35 685.35
SECTIONAREA
TENSIONELASTIC
MODULUSDIRECTSHEAR
Allow.Tension
Ft(KN)
Allow.Length
Lx(m)
Allow.Length
Ly(m)
Allow.@X-X axis
Mxx(Knm)
Allow.@Y-Y axis
Myy(Knm)
Allow.@X-X axis
Fx(KN)
Allow.@Y-Y axis
Fy(KN)(mm )
2
BENDINGMOMENTS
ZyyZxx
SAFE LOAD CAPACITIES OF "TATA" SINGLE RHSMATERIAL: IS : 4923, GRADE : 310
154
RHS 50X25X3.2 413 76.82 5.88 3.36 4.65 3.04 0.95 0.62 25.61 51.21
RHS 66X33X2.9 519 96.53 8.01 4.65 8.28 5.53 1.70 1.13 32.18 64.36
RHS 66X33X3.6 628 116.81 7.87 4.51 9.66 6.37 1.98 1.31 38.94 77.87
RHS 66X33X4.5 758 140.99 7.70 4.37 11.10 7.23 2.28 1.48 47.00 93.99
RHS 96X48X3.2 854 158.84 11.90 6.89 20.54 13.87 4.21 2.84 52.95 105.90
RHS 96X48X4.0 1047 194.74 11.72 6.79 24.49 16.38 5.02 3.36 64.91 129.83
RHS 96X48X4.8 1231 228.97 11.55 6.65 27.99 18.56 5.74 3.80 76.32 152.64
RHS 122X61X3.6 1232 229.15 15.19 8.85 38.13 25.84 7.82 5.30 76.38 152.77
RHS 122X61X4.5 1514 281.60 15.01 8.71 45.73 30.75 9.37 6.30 93.87 187.74
RHS 122X61X5.4 1785 332.01 14.84 8.57 52.60 35.09 10.78 7.19 110.67 221.34
RHS 145X82X4.8 2028 377.21 18.30 11.76 76.57 55.73 15.70 11.42 125.74 251.47
RHS 145X82X5.4 2260 420.36 18.20 11.65 84.26 61.12 17.27 12.53 140.12 280.24
RHS 172X92X4.8 2383 443.24 21.70 13.37 106.64 75.41 21.86 15.46 147.75 295.49
RHS 172X92X5.4 2659 494.57 21.59 13.26 117.73 82.99 24.13 17.01 164.86 329.72
RHS 200X100X4.0 2295 426.87 25.31 14.23 119.97 82.16 24.59 16.84 142.29 284.58
RHS 200X100X5.0 2836 527.50 25.10 14.67 145.93 99.39 29.92 20.37 175.83 351.66
RHS 200X100X6.0 3363 625.52 24.92 14.49 170.33 115.38 34.92 23.65 208.51 417.01
RHS 200X100X8.0 4379 814.49 24.50 14.18 214.62 143.84 44.00 29.49 271.50 543.00
RHS 220X140X4.0 2775 516.15 28.91 20.44 172.06 135.38 35.27 27.75 172.05 344.10
RHS 220X140X5.0 3436 639.10 28.74 20.30 210.31 165.40 43.11 33.91 213.03 426.06
RHS 220X140X6.0 4083 759.44 28.53 20.13 246.47 193.10 50.53 39.59 253.15 506.29
RHS 220X140X8.0 5339 993.05 28.18 19.81 314.21 344.61 64.41 70.65 331.02 662.04
RHS 240X120X4.0 2775 516.15 30.52 17.89 175.89 120.89 36.06 24.78 172.05 344.10
RHS 240X120X5.0 3436 639.10 30.35 17.75 214.97 147.08 44.07 30.15 213.03 426.06
RHS 240X120X6.0 4083 759.44 30.14 17.57 252.16 171.74 51.69 35.21 253.15 506.29
RHS 240X120X8.0 5339 993.05 29.72 17.26 320.99 216.66 65.80 44.42 331.02 662.04
RHS 260X180X6.0 5043 938.00 34.34 25.90 373.53 307.05 76.57 62.95 312.67 625.33
RHS 260X180X8.0 6619 1231.13 33.99 25.59 479.90 393.12 98.38 80.59 410.38 820.76
RHS 260X180X10 8143 1514.60 33.60 25.27 577.65 471.58 118.42 96.67 504.87 1009.73
RHS 260X180X12 9614 1788.20 33.25 24.96 667.11 542.77 136.76 111.27 596.07 1192.14
RHS 300X150X6.0 5163 960.32 37.98 22.23 404.90 277.28 83.00 56.84 320.11 640.21
RHS 300X150X8.0 6779 1260.89 37.56 21.91 520.53 353.88 106.71 72.55 420.30 840.60
RHS 300X150X10 8343 1551.80 37.17 21.60 626.93 423.16 128.52 86.75 517.27 1034.53
RHS 300X150X12 9854 1832.84 36.75 21.28 724.41 485.47 148.50 99.52 610.95 1221.90
RHS 300X200X6.0 5763 1071.92 39.59 29.02 491.35 396.22 100.73 81.23 357.31 714.61
RHS 300X200X8.0 7579 1409.69 39.20 28.70 634.24 509.70 130.02 104.49 469.90 939.80
RHS 300X200X10 9343 1737.80 38.85 28.39 767.15 614.43 157.27 125.96 579.27 1158.53
RHS 300X200X12 11054 2056.04 38.47 28.07 890.39 710.43 182.53 145.64 685.35 1370.70
SECTIONAREA
TENSIONELASTIC
MODULUSDIRECTSHEAR
Allow.Tension
Ft(KN)
Allow.Length
Lx(m)
Allow.Length
Ly(m)
Allow.@X-X axis
Mxx(Knm)
Allow.@Y-Y axis
Myy(Knm)
Allow.@X-X axis
Fx(KN)
Allow.@Y-Y axis
Fy(KN)(mm )
2
BENDINGMOMENTS
ZyyZxx
PERMISSIBLE AXIAL COMPRESSIVE STRESS (Yst 310 Grade)
10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 190 200 210 220 230 240 250 300 350
186 183 178 169 157 143 128 113 99 87 77 67 60 53 47 42 38 34 31 28 26 23 22 20 18 13 10
1/r
Ac
OTHER ALLOWABLE STRESS VALUES (IN Mpa)
SteelGrade
MinimumYield Stress
MinimumUTS
Axial Stress inTension
Bending Stressin Ten. or Compn.
ShearStress
BearingStress
EquivalantStress
Yst 310 310 450 186 205 140 232 279
SectionType Grade
Mechanical Properties
YST UTS % of Elongation
Mpa Mpa <25.4mm
<25.4mm
Dimensional Tolerance
Outsidedimension
Thickness SquarenessCornerradius
Weight
Individuallengths
On lot of10 MT
RHS/SHSIS: 4923
CHSIS: 1161
YST 210 210 330 12 20
YST 240 240 410 10 15
YST 310 310 450 8 10
YST 210 210 330 12 20
YST 240 240 410 12 17
YST 310 310 450 12 14
+/-1% with aminimum of+/-0.50 mm
+/-10%90 deg.
+/-2 deg. 31 max10%-8%
+/-7.5%
OD upto andIncl 48.3
+0.4/-0.8 mm;Over 48.3 mm
+/-1.0%
+ no limit-10%
NA NA
L+10%,-8%
L+/-5%
M & H+/-10%
M & H+/-7.5%
Length 6.0 m ± 0.05 m Customized length ranging from 6 m may be supplied.
Minimum 1: 200th of any length measured along the centre line (mill straightened condition) unless otherwisespecifically arranged.
Straightness
Maximum 2 mm ± 0.5 mm / m length – measured relative vertical shift of any adjacent corner of the section,measured by keeping one side on flat surface.
Twist Tolerance
End Finish Plain ended – Mechanically sheared, mill – cut finish without further machining.
Surface Finish Black without any surface treatment of oiling or varnishing.
Raw MaterialSulphur content: 0.05% max, phosphorus content: 0.05% max, equivalent carbon percentage well withinspecified weldability limits with matching physical properties. For corrosion resistant steel in Cu-bearingvariety, refer to the WRS section of this brochure.
Weldability Tata Structura Steel Hollow Section are weldable with standard M. S. Electrodes without any pre-heating.
Bundled by sealing metal strap, and each bundle is labelled for size, measurement, Lot no. etc. Approximateweight of each bundle is 1.5 Mt (+/-500 kg).Packing
Marking of emblem on surface punched/stenciled/sticker pasted on all Steel HollowSections. Standard BIS mark is also put on the sections.
"TATA STRUCTURA"Identification
Tata Structura Hollow Sections in customized size, grade, length, surface finish and end finish may be deliveredas per agreed supply conditions.NOTE
155
General Technical Specifications and Tolerances
156
SECTION PROPERTIES
Properties of Tata Structura (Square Hollow Sections)YST 310 Grade
157
Properties of Tata Structura (Rectangular Hollow Sections)YST 310 Grade
158
Properties of Tata Structura (Circular Hollow Sections)YST 310 Grade
Pipe Supporting Structure,
Tata Steel, Jamshedpur
Tata Steel Limited (Tubes SBU)
43, Jawaharlal Nehru Road, Kolkata - 700 071
Tel : +91 33 2224 8160, 2224 8636, Fax: +91 33 2288 6996
E-mail:[email protected], Web: www.tatastructura.com
Call our toll free Helpline : 1800 345 8282
Proper care has been taken to ensure that all data and information herein is factual
and that numerical values are accurate.
To the best of our knowledge, all information contained in the manual is accurate at
the time of publication. However, Tata Steel does not assume any responsibility for
error in or interpretation of information in this manual or in its use.
vers
usad@
gm
ail.
com
October 2011
Commonwealth Games Village, Delhi
