KENYA STANDARD       KS 572: 2017  
  
 
 
 
 
 
 
 
 
 
 
Specification f or hot -rolled structural steel 
sections  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
No copying of this standard without KEBS permission except as permitted by copyright law 
 
  
 TECHNICAL COMMITTEE REPRESENTATION  
 
The following organizations were repr esented on the Technical Committee:  
 
1. Architectural association of Kenya  
2. Blue Nile group of companies   
3. Brollo Kenya Limited  
4. Consumer Information Network  
5. Dedan Kimathi University Of Technology \ 
6. Devki Steel Mill Ltd  
7. Doshi & co(H) Ltd  
8. Howard Humphreys  
9. Insteel Limited  
10. Kenya Association of manufacturers  
11. Kenya Institute of Research and development   
12. Kenya National Accreditation Services     
13. Nails and Steel Products  
14. National Housing Corporation  
15. Palak international  limited  
16. Steel Makers Ltd  
17. Tononoka Steels  
18. University of Nairobi  
19. Kenya Bureau of Standards — Secretariat  
 
REVISION OF KENYA STANDARDS  
 
In order to keep abreast of progress in industry, Kenya Standards shall be regularly reviewed. Suggestions  for 
improvements to published standards, addressed to the Managing Director, Kenya Bureau of Standards, are 
welcome.  
 
 
 
 
 
 
© Kenya Bureau of Standards, 2017  
 
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 KENYA STANDARD        KS 572: 2017  
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Specification for hot -rolled structural steel 
sections  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
KENYA BUREAU OF STANDARDS (KEBS)  
 
Head Office:  P.O. Box 54974, Nairobi -00200, Tel.: (+254 020) 605490, 602350, Fax: (+254 020) 604031  
E-Mail: info@kebs.org,  Web:http://www.kebs.org   
 
Coast Region     Lake Region          Rift Valley Region  
P.O. Box 99376, Mombasa -80100   P.O. Box 2949, Kisumu -40100        P.O. Box 2138, Nakuru -20100  
Tel.: (+254 041) 229563, 230939/40                Tel.: (+254 057) 23549, 22396        Tel.: (+254 051) 210553, 210555  
Fax: (+254 041) 229448    Fax: (+254 057) 21814             KS 572: 2017                                ©KEBS  
2 Foreword  
 
This Kenya Standard was prepared by the Steel Technical Committee under the guidance of the Standards 
Projects Committee and it is in accordance with the procedures of the Kenya Bureau of Standards.  
 
The standard specifies the requirements of hot -rolled structural steel sections, which are currently rolled in 
Kenya.  
 
Hot-rolled structural steel sections are widely used in the construc tion of steel structures.  It is hoped that this 
standard will control the variation in dimensions, chemical composition and, hence, the strength of these 
sections.  
 
The standard has excluded sections of imperial sizes or direct metric conversions as these  sizes will be 
discarded with the adoption of fully metric sizes.  
 
In preparing this standard, reference was made to the following International Standards and other sources 
which are highly acknowledged with thanks:  
 
ISO 657 — Dimensions of hot -rolled stee l sections.  
 
ISO 1035 — Dimensions of hot -rolled flat bars.  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 ©KEBS             KS 572: 2017 
 
3   
KENYA STANDARD  
 
 
 
Specification for hot -rolled structural steel sections  
 
1. Scope  
 
This Kenya Standard specifies the requirements for nominal dimensions, mass and basic secti onal 
properties of hot -rolled structural steel sections.  It also lays down rolling and cutting tolerances.  The 
sections covered include the following:  
 
(i) Equal angles  
 
(ii) Unequal angles  
 
(iii) Channels  
 
(iv) Flats.  
 
2. Definitions  
 
 For the purpose of this standard, the  following definitions shall apply:  
 
2.1  
longitudinal direction   
the direction of the greatest extension of the steel during rolling  
 
2.2  
transverse direction   
the direction at right angles to the direction of the greatest extens ion of the steel during rolling  
 
2.3 t 
section  
his is a rolled finished product of solid section of special profile  
 
2.4  
flat  
a solid rectangular cross -section with edges of controlled profile and of thickness greater than or equal to 3 
mm, width less than 600 mm and supplied in straight length  
 
2.5  
bundle  
two or more similar sections of the same size and material properly bound together  
 
2.6  
batch   
any quantity of similar sections of one size and material type in bundles presented for examination and test at 
any one time  
 
2.7  
test specimen  a 
 portio n or a single item from a batch for the purpose of applying a particular test  
 
2.8  
test piece  
a prepared piece for testing, made from a test specimen by some mechanical operation  
 
2.9  KS 572: 2017                                ©KEBS  
4 ultimate tensile stress or tensile strength  
the maximum load reached i n a tensile test divided by the original cross -sectional area of the gauge length 
portion of the test piece.  
 
3. Nominal density and nominal mass  
 
3.1 Nominal density  — For the purpose of calculating mass, the density of hot -rolled steel shall be 
taken as 7 850 kg/m3. 
 
3.2 Nominal Mass  — The nominal mass per metre length of sections is calculated on the basis of the 
nominal density in 3.1 multiplied by the cross -sectional area and as shown in Tables 11 – 14. 
 
4. Steel making process  
 
4.1 Method of manufacturing  steel  — The method of manufacturing steel, which shall be at the 
option of the manufacturer, shall be disclosed if requested in the order.  However, the steel so 
produced shall be in accordance with KS 02 -18, Specification for steel for building and const ruction.  
 
4.2 Freedom from  defects  — The rolled sections shall be free from pipe, harmful segregation, surface 
flaws, foreign bodies, mill scales, which cannot be removed by manual wire brushing and other defects 
detrimental to their use.  
 
5. Dimensions and to lerances  
 
5.1 Dimensions and sectional properties  — The  dimensions and sectional properties of the 
rolled sections shall be as specified in Tables 11 — 14. 
 
note:  The sizes of the toe radii are specified but the sectional properties have been calculated a ssuming a toe radius equal 
to half the root radius.  
 
5.2 Tolerances on mass   — The rolling tolerances on mass per unit length as measured on a sample 
shall be ± 4per cent.  
  
 
5.3 Dimensional tolerances  
 
5.3.1  Angles  
 
5.3.1.1  Leg length  — The tolerances on leg length sha ll be as shown in Table 1.  
 
 
Table 1 Leg length tolerance  
 
 
Leg  length  
 Tolerance   
Over   
Up to and Including  
 
mm mm mm 
— 50  ± 1.0  
50 100  ± 1.5  
100 150  ± 2.0  
150 200  ± 3.0  
 
5.3.1.2  Thickness  — Thickness tolerance on angles shall be as shown in Table 2.  
 
 
Table 2.thickness tolerance  
 
 
 
Actual thickness  
 Tolerance  
 
Over  Up to and Including  ©KEBS             KS 572: 2017 
 
5  mm mm mm 
— 10 ± 0.5  
10 15 ± 0.8  
15 20 ± 1.0  
20 — ± 1.2  
 
     
5.3.1.3  Out-of-square  — The tolerance on out -of-square shall be as shown in Table 3.  
 
Note:  When measuring the out -of-square, the back -of-the-square and the centreline of the reference  leg must be 
parallel.  Figure 1 shows measurement of out -of-square.  
 
 
 
Table 3. Out -of-square  
    
Leg length  
  
Maximum deviation  
 
 
Over   
Up to and Including  
 
 
mm  
mm  
mm 
 
— 50 1.0 
50 100 2.0 
100 200 3.0 
 
 
 
 
 
 
 
 
5.3.1.4  Tolerance on straightness  — Tolerances on straightness shall be as shown in Table 4.  Figure 2 
indicates the measurement of straightness.  
 
 
 
Table 4. Straightness  
   
Leg length   
Staightness  
Tolerance  
 
Over  Up to a nd Including   
KS 572: 2017                                ©KEBS  
6 mm  mm 
— 
150  150 0.4 per cent of length  
 200 0.25 per cent of length  
 
 
 
 
 
 
 
 
 
 
 
 
 
Figure 2 — measurement of straightness tolerance  
 
 
5.3.2  Channels  
 
5.3.2.1  Depth  — The tolerance on depth of channels shall be as shown in Table 5.  
 
 
Table  5. Depth t olerance  
     
Depth  
  
Tolerance  
  
Over  
  
Up to and Including  
 
mm  mm  mm  
—  150  + 3 
 -  1.5 
150  300 + 3 
-  2 
 
300  400 + 4 
-  3 
 
5.3.2.2  Width of flange  — The tolerance of flange width shall be as shown in Table 6.  
 
 
Table 6.  Tolerance on flange width  
 
 
Width of flange  
 Tolerance  
Including and Over  Up to  
mm mm mm 
— 75 ± 2.0  
75 — ± 3.0  
 
©KEBS             KS 572: 2017 
 
7   
5.3.2.3  Flange thickness  — Tolerance on flange thickness shall be as shown in Table 7.  
 
Table 7. Tolerance on flange thickness  
 
 
Thickness of flange , T 
  
Tolerance  
 Over  Up to and Including  
mm mm mm 
— 9.0 - 0.5 
9.0 15.0 - 1.0 
15.0 17.0 - 1.5 
 
 
5.3.2.4  Tolerance on thickness of web  — Tolerance on thickness of all webs of channels shall be ± 0.5 mm.  
 
5.3.2.5  Flange out -of-square  — The flange of the channels shall be parallel within th e tolerances specified in 
Table 8 ( see Figure  3). 
 
Table 8. Flange out -of-square  
 
 
WIDTH OF FLANGE  
 TOLERANCE  
(Max. Deviation)  
  
Over   
Up to and Including  
 
mm mm mm 
— 60 1.0 
60 80 1.5 
80 100 2.0 
 
 
 
Figure 3 — flange out -of-square  
 
 
5.3.2.6  Flatness of web  — The tolerance on flatness of outer face of web of channel shall be as follows ( see 
Figure 4)  
 
Convexity ………………………………………… Not permitted  
 
Concavity ………………………………………… 15 per cent of nominal thickness of web.  
 
 
KS 572: 2017                                ©KEBS  
8  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Figure 4 — flatness of web of channels  
 
5.3.3  Flats  
 
5.3.3.1  Width  — The tolerance on width of hot -rolled steel flats shall be in accordance with Table 9.  
 
Table 9. Tolerance on width of flats  
 
 
WIDTH  
 TOLERANCE  
 Over  Up to and Including  
mm mm mm 
— 50 ± 1.0 
50 75 ± 1.2  
75 100 ± 1.5  
100 125 ± 2.0  
125 150 ± 2.5  
 
5.3.3.2  Thickness  — The tolerance on thickness of flats shall be in accordance with Table 10.  
 
Table 10. Tolerance on thickness of flats  
 
 THICKNESS   
TOLERANCE ON THICKNESS FOR WIDTH 
(b) 
 
©KEBS             KS 572: 2017 
 
9  Over  Up to and Including  b < 50 50 < b < 150  
mm mm mm mm 
— 20 ± 0.5  ± 0.5  
20 40 ± 0.8  ± 1.0  
40 — — ± 1.5  
 
 
5.4 Cutting Tolerance for Length  — Sections shall be ordered and supplied either as ‘nominal’ or as 
‘exact’ lengths.  
 
5.4.1  Nominal Length  —The sections shall be supplied in lengths of 12m, 6 m and 3m  and below .  The 
tolerance on nominal length shall be ± 0.4 per cent of that length.  
 
 
5.4.2  Exact Length  — When a section is to be cut to an exact length, it shall be supplied to within ± 0.08 per 
cent of that length.  
 
 
5.5 Straightness and twist — All sections le aving the factory shall be straight and free from twist and 
adverse effects of weather.  
 
6. Routine inspection and testing  
 
6.1 All materials shall be subject to routine inspection and testing by the manufacturer or supplier in 
accordance with 7 and 8 of this standard, and a record of the test results of materials complying with 
this standard shall be kept by the supplier in a form similar to that shown in Appendix A.  The records 
shall be available for inspection by the purchaser or his representative on deman d.  In the case of a 
material delivered to a purchaser, the manufacturer shall supply a certificate containing the results of 
all the required tests on samples taken from the delivered material if requested by the purchaser.  
 
6.2 Purchaser’s test  
 
6.2.1  The purchase r may verify each batch of steel for compliance with the requirements for nominal mass, 
dimensional tolerances and elongation.  
 
6.2.2  If the purchaser wishes to verify that the specified characteristic strength ( 8.5.2 ) is attained by a batch 
of steel of 35 000 k g or less, 10 sections shall be chosen at random from the batch and a tensile test 
specimen cut from each section.  These test specimens shall be tested to confirm that all sections 
meet the requirements for the specified section size.  So long as all the test specimens meet this 
specification then the test specimens shall undergo tensile testing.  If one or more test results are less 
than 0.93 of the specified characteristic strength, then the batch shall be deemed not to comply with 
the requirements of th is standard.  
 
7. Selection of test samples  
 
7.1 Test samples of sufficient length for the specified tests shall be selected from each batch at a 
frequency not less than one sample from each 25 000 kg, except that if a batch comprises sections 
less than the qua ntity specified, at least one test sample shall be selected to represent a day’s 
production.  
 
7.2 Manufacturers shall identify the sections as belonging to a particular batch with a suitable marker or 
identification in a manner that the sections can be traced to the cast from which they are rolled.  In such 
a case, the purchaser’s test of sections specified under 6.2.2  shall be on the basis of batch so 
identified.  
 
8. Tensile test  
 
8.1 The tensile test shall be carried out in accordance with ISO 6892 - 1, Methods f or tensile testing of 
metals.  
 KS 572: 2017                                ©KEBS  
10 8.2 Tensile Test Piece  — The test piece shall consist of a strip taken from 1 metre test specimen.  The 
strip shall be taken longitudinally at any point of the section for flats and angles but along the web for 
channels.  The str ip shall comply with the following conditions:  
 
(i) sides of test piece shall be parallel within a maximum variation along parallel length of ± 0.2 
per cent of nominal width.  
 
(ii) The trimmed ends and parallel length of test piece shall be coaxial.  
 
(iii) Nominal gauge length Lo = 5.65 
So  
 
where So = the original cross -sectional area of the test piece.  
 
Lo shall be within ± 5 per cent of the nominal values.  
 
(iv) Minimum parallel length Lp = Lo + 2 nominal widths.  
 
(v) The width of the test piece shall be not  less than 6 mm.  
 
(vi) The test piece shall not be flattened between the gauge marks except for the purpose of 
gripping the test piece in a test machine.  
 
8.3 Rate of Loading  — The rate of loading when approaching the yield stress shall not exceed 10 N/mm  2 
per sec ond. 
 
8.4 Yield  stress  
 
8.4.1  For routine testing the yield stress shall be taken as the stress at which elongation first occurs in the 
test piece without increasing the load during tensile test.  In the case of steels with no such definite 
yield point, the proof s tress is the stress under the prescribed testing conditions at which the observed 
increase in the gauge length is 0.5 per cent of the gauge length when the rate at which the load applied 
is not more than 10 N/mm2 per second.  
 
8.4.2  The stresses shall be calculat ed using the original cross -sectional area of the gauge length portion of 
the specimen.  
 
8.5 Specified characteristic strength  
 
8.5.1  The specified characteristic strength of the steel is the value of yield stress determined in accordance 
with 7.1 of this standard, below which shall fall not more than 5 per cent of the test results.  
 
8.5.2  The specified characteristic strength of the mild steel shall be 250 N/mm 2. 
 
8.5.3  When one or more test results is less than 93 per cent of the specified characteristic strength, then the  
batch shall be deemed not to comply with the requirements of this Kenya Standard.  
 
8.6 Tensile Strength  — The ultimate tensile strength shall be at least 15 per cent greater than the yield 
stress measured in the tensile test.  
 
8.7 Minimum Elongation  — The minimum e longation on gauge length of the steel complying with this 
standard shall be 22 per cent.  
 
9. Chemical composition  
 
 The chemical composition shall be in accordance to table 1 of KS 18.  
 
10. Defects revealed after delivery  
 
Should any or all material after  delivery be found not to be in accordance with this specification, such 
material shall be deemed not to comply with this Kenya Standard.  However, notwithstanding any 
previous acceptance, materials delivered, which does not comply with this standard due t o bad ©KEBS             KS 572: 2017 
 
11  bending, chemical exposure, heating etc. while on transit or on site shall not be cause for 
manufacturer’s liability.  
 
11. Marking  
 
 Each  piece  for despatch shall be indelibly and legibly  marked with the following particulars:  
 
i. Manufacturer’s name or  trade mark.  
ii. Designation of section.  
iii. Length of the section.  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Figure 5 — dimensions and principal axes of equal angle section  
 
 
©KEBS                    KS 572: 1986  
12 Table 11. Equal angles ( see figure 5)  
 
DESIGNATION  
LEG  LENGTH  
B 
THICKNESS  
t RADIUS  
 
MASS/UNIT  
LENGTH  
 
AREA OF S ECTION  
 
DISTANCE OF 
CENTRE OF GRAVITY 
C 
  
SECOND MOMENT OF AREA  
  
RADIUS OF GYRATION   
ELASTIC 
MODULES  
 Size 
Thick ness  Root  
r1 Toe 
r2  
About  
X-X 
Y-Y  
About  
U-U  
About  
V-V  
About  
X-X 
Y-Y  
About  
U-U  
About  
V-V  
About  
X-X 
Y-Y 
mm mm mm mm mm mm kg/m  cm2 cm cm4 cm4 cm cm cm cm cm3 
20x20  3 20 3 3.5 2.4 0.88 1.12 0.60 0.39 0.61 0.16 0.59 0.74 0.38 0.28 
20x20  4 20 4 3.5 2.4 0.14 1.45 0.64 0.49 0.77 0.21 0.58 0.73 0.38 0.36 
                
25x25  3 25 3 3.5 2.4 1.11 1.42 0.72 0.80 1.26 0.33 0.75 0.94 0.48 0.45 
25x25  4 25 4 3.5 2.4 1.45 1.85 0.76 1.01 1.60 0.43 0.74 0.93 0.48 0.58 
25x25  6 25 6 3.5 2.4 2.08 2.65 0.84 1.38 2.15 0.61 0.72 0.90 0.48 0.83 
                
30x30  3 30 3 5 2.4 1.36 1.74 0.84 0.40 2.23 0.58 0.90 1.13 0.58 0.65 
30x30  4 30 4 5 2.4 1.78 2.27 0.88 1.80 2.85 0.75 0.89 1.12 0.58 0.85 
30 x 30  6 30 6 5 2.4 2.54  3.24  0.97  2.55    0.89     
                
                
40x40  3 40 3 6 2.4 1.84 2.35 1.07 3.45 5.46 1.44 1.21 1.52 0.78 1.18 
40x40  4 40 4 6 2.4 2.42 3.08 1.12 4.47 7.09 1.85 1.21 1.53 0.78 1.55 
40x40  6 40 6 6 2.4 3.52 4.48 1.20 6.31 9.89 2.65 1.19 1.49 0.77 2.26 
                
50x50  3 50 3 7 2.4 2.33 2.96 1.31 6.86 10.8 2.88 1.52 1.91 0.99 1.86 
50x50  4 50 4 7 2.4 3.06 3.89 1.36 8.97 14.2 3.72 1.52 1.91 0.98 2.46 
50x50  5 50 5 7 2.4 3.77 4.80 1.40 11.0 17.4 4.54 1.51 1.90 0.97 3.05 
50x50  6 50 6 7 2.4 4.77 5.69 1.45 12.8 20.4 5.33 1.50 1.89 0.97 3.61 
50x50  8 50 8 7 2.4 5.82 7.41 1.52 16.3 25.7 6.87 1.48 1.86 0.96 4.68 
                
                
TABLE 11.  EQUAL ANGL ES (contd.) (see FIGURE 5)  
 
DESIGNATION  
 
LEG 
LENGTH  
B 
 
THICKNESS  
t RADIUS  
 
MASS/UNIT  
LENGTH  
 
AREA Of 
SECTION  
 
DISTANCE OF  
CENTRE OF  
GRAVITY  
C 
  
SECOND MOMENT OF 
AREA  
  
RADIUS OF GYRATION   
ELASTIC 
MODULUS  Size 
Thick ness  Root  
r1 Toe 
r2  
About  
X-X 
Y-Y  
About  
U-U  
About  
V-V 
  
About  
X-X 
Y-Y  
About  
U-U  
About  
V-V  
About  
X-X 
Y-Y ©KEBS                    KS 572: 1986  
 
13  mm mm mm mm mm mm kg/m  cm2 cm cm4 cm4 cm4 cm cm cm cm3 
60x60  5 60 5 8 2.4 4.57 5.82 1.64 19.4 30.7 8.02 1.82 2.30 1.17 4.45 
60x60  6 60 6 8 2.4 5.42 6.91 1.69 22.8 36.2 9.43 1.82 2.29 1.17 5.29 
60x60  8 60 8 8 2.4 7.09 9.03 1.77 29.2 46.2 12.1 1.80 2.26 1.16 6.89 
60x60  10 60 10 8 2.4 8.69 11.1 1.85 34.9 55.1 14.8 1.78 2.23 1.16 8.41 
                
65x65  5 65 5 8 2.4 4.90 6.25 1.77 24.7 39.4 9.9 1.99 2.51 1.26 5.2 
65x65  6 65 6 8 2.4 5.80 7.44 1.81 29.1 46.5 11.7 1.98 2.50 1.26 6.2 
65x65  8 65 8 8 2.4 7.70 9.76 1.89 37.4 59.5 15.3 1.96 2.47 1.25 8.1 
65x65  10 65 10 8 2.4 9.40 12.00  1.97 45.0 71.3 10.8 1.94 2.44 1.25 9.9 
                
70x70  5 70 5 9 2.4 5.37 6.84 1.88 31.3 49.5 13.0 2.14 2.69 1.38 6.11 
70x70  6 70 6 9 2.4 6.38 8.13 1.93 36.9 58.5 15.2 2.13 2.68 1.37 7.27 
70x70  8 70 8 9 2.4 8.36 10.6 2.01 47.5 75.5 19.7 2.11 2.66 1.36 9.52 
70x70  10 70 10 9 2.4 10.30  13.1 2.09 57.2 90.5 23.9 2.09 2.63 1.35 11.7 
                
75x75  6 75 6 9 2.4 6.8 8.66 2.06 45.7 73.1 18.4 2.30 2.91 1.46 8.4 
75x75  8 75 8 9 2.4 8.9 11.38  2.14 59.0 94.1 24.0 2.28 2.88 1.45 11.0 
75x75  10 75 10 9 2.4 11.0 14.02  2.22 71.4 113.3  29.4 2.26 2.84 1.45 13.5 
75x75  12 75 12 9 2.4 13.07  16.65  2.29 82.8 132.3  32.3 2.23 2.82 1.39 15.9 
                
80x80  6 80 6 10 4.8 7.34 9.35 2.17 55.8 88.5 23.1 2.44 3.08 1.57 9.57 
80x80  8 80 8 10 4.8 9.63 12.3 2.26 72.2 115 29.8 2.43 3.06 1.56 12.6 
80x80  10 80 10 10 4.8 11.90  15.1 2.34 87.5 139 36.3 2.41 3.03 1.55 15.d4  
80x80  12 80 12 10 4.8 14.0 17.9 2.41 102 161 42.7 2.39 3.00 1.55 18.2 
                
90x90  6 90 6 11 4.8 8.30 10.6 2.41 80.3 127 33.3 2.76 3.47 1.78 12.2 
90x90  8 90 8 11 4.8 10.9 13.9 2.50 104 166 43.1 2.74 3.45 1.76 16.1 
90x90  10 90 10 11 4.8 13.4 17.1 2.58 127 201 52.8 2.72 3.42 1.76 19.8 
90x90  12 90 12 11 4.8 15.9 20.3 2.66 148 234 62.0 2.70 3.40 1.75 23.3 
                
100x100  8 100 8 12 4.8 12.2 15.5 2.74 145 230 59.8 3.06 3.85 1.96 19.9 
100x100  10 100 10 12 4.8 15.0 19.2 2.82 177 280 72.9 3.04 3.83 1.95 24.6 
100x100  12 100 12 12 4.8 17.8 22.7 2.90 207 328 85.7 3.02 3.80 1.94 29.1 
100x100  15 100 15 12 4.8 21.9 27.9 3.02 249 393 104 2.98 3.75 1.93 35.6 
TABLE 11.  EQUAL ANGLES (contd.) (see FIGURE 5)  
 
DESIGNATION  
 
LEG 
Length  
B 
 
thickness  
t RADIUS  
 
MASS/ UNIT  
LENGTH  
 
AREA OF 
SECTION  
 
DISTANCE OF  
CENTRE OF 
GRAVITY   
SECOND MOMENT OF 
AREA  
  
RADIUS OF GYRATION   
ELASTIC  
MODULUS  Size 
Thickness   
Root  
r2  
Toe 
r2  
About  
X-X 
Y-Y  
About  
U-U  
About  
V-V  
About  
X-X 
Y-Y  
About  
U-U  
About  
V-V  
About 
X-X 
Y-Y 
 
mm mm mm mm mm mm kg/m  cm2 cm cm4 cm4 cm4 cm cm cm cm2 KS 572: 1986                                                                                                           ©KEBS  
14 120x120  8 120 8 13 4.8 14.7 18.7 3.23 255 405 105 3.69 4.65 2.37 29.1 
120x120  10 120 10 13 4.8 18.2 23.2 3.31 313 497 129 3.76 4.63 2.36 36.0 
120x120  12 120 12 13 4.8 21.6 27.5 3.40 368 584 151 3.65 4.60 2.35 42.7 
120x120  15 120 15 13 4.8 26.6 33.9 3.51 455 705 185 3.62 4.56 2.33 52.4 
                
150x150  10 150 10 16 4.8 23.0 29.0 29.3 4.03 624 991 4.62 5.82 2.97 56.9 
150x150  12 150 12 16 4.8 27.3 34.8 4.12 737 1 170  303 4.60 5.80 2.95 67.7 
150x150  15 150 15 16 4.8 33.8 43.0 4.25 898 1 430  370 4.57 5.76 2.93 83.5 
150x150  18 150 18 16 4.8 40.0 51.0 4.37 1 050  1 670  435 4.54 5.71 2.92 98.7 
                
180x180  15 180 15 18 4.8 40.9 52.1 4.98 1 590  2 520  653 5.52 6.96 3.54 122 
180x180  18 180 18 18 4.8 48.6 61.9 5.10 1 870  2 960  768 5.49 6.92 3.52 145 
180x180  20 180 20 18 4.8 53.7 68.3 5.18 2 040  3 240  843 5.47 6.89 3.51 159 
                
200x200  16 200 16 18 4.8 48.5 61.8 5.52 2 340  3 720  959 6.16 7.76 3.94 162 
200x200  18 200 18 18 4.8 54.2 69.1 5.60 2 600  4 130  1 070  6.13 7.73 3.93 181 
200x200  20 200 20 18 4.8 59.9 76.3 5.68 2 850  4 530  1 170  6.11 7.70 3.92 199 
200x200  24 200 24 18 4.8 71.1 90.6 5.84 3 330  5 280  1 380  6.06 7.64 3.90 235 
 
 ©KEBS             KS 572: 1986  
15 TABLE 12. UNEQUAL ANGLES ( see FIGURE 6)  
 
DESIGNATION    
LEG 
 LENGTHS  
 
 
THICKNESS  
t RADIUS  
 
MASS/UNIT  
LENGTH  
 
AREA OF  
SECTION   
DISTANCE OF  
CENTRE OF  
GRAVITY  
 
Size Thickness    Root  
r1 Toe 
r2 
  
cx  
cy B D 
(1) (2) (3) (4) (5) (6) (7) (8) (9) (10) (11) 
mm mm mm mm mm mm mm kg/m  cm2 cm cm 
30x20  3 30 20 3 4 2.4 1.12 1.45 0.99 0.50 
30x20  4 30 20 4 4 2.4 1.46 1.86 1.03 0.54 
30x20  5 30 20 5 4 2.4 1.78 1.78 1.07 0.58 
           
40x25  4 40 25 4 4 2.4 1.93 2.46 1.26 0.62 
40x25  5 40 25 5 4 2.4 2.37 3.02 1.40 0.66 
           
45x30  4 45 30 4 4 2.4 2.24 2.86 1.48 0.74 
45x30  5 45 30 5 4 2.4 2.76 3.52 1.52 0.78 
           
60x30  5 60 30 5 4 2.4 3.37 4.29 2.15 0.68 
60x30  6 60 30 6 6 2.4 3.99 5.08 2.20 0.72 
 
 
 
TABLE 12. UNEQUAL ANGLES ( Cont‘d  (see FIGURE 6)  
 
SIZE   
SECOND MOMENT  OF AREA  
  
RADIUS OF GYRATION  
 ANGLES  
α  
ELASTIC  
MODULUS  
 
  
About  
X-X  
About  
Y-Y 
  
About  
U-U 
  
About  
V-V 
  
About  
X-X 
  
About  
Y-Y 
  
About  
U-U  
About  
V-V 
  
About  
X-X 
  
About  
Y-Y 
 (12) (13) (14) (15) (16) (17) (18) (19) (20) (21) (22) 
cm 4 cm4 cm4 cm4 cm cm cm cm tan α  cm3 cm3 
1.25 0.44 1.43 0.26 0.93 0.55 1.00 0.42 0.427  0.62 0.29 
1.59 0.55 1.81 0.33 0.92 0.55 0.99 0.42 0.421  0.81 0.38 
1.90 0.66 2.15 0.40 0.91 0.54 0.97 0.42 0.412  0.98 0.46 
           
3.89 1.16 4.35 0.70 1.26 0.69 1.33 0.53 0.380  1.47 0.62 
 4.69 1.39 5.23 0.85 1.25 0.68 1.32 0.53 0.374  1.81 0.76 
           
5.77 2.05 6.63 1.19 1.42 0.85 1.52 0.65 0.434  1.91 0.91 
6.98 2.47 8.00 1.44 1.41 0.84 1.51 0.64 0.429  2.35 1.11 
           
15.6 2.60 16.5 1.69 1.90 0.78 1.96 0.63 0.256  4.04 1.12 
18.2 3.02 19.2 1.99 1.89 0.77 1.95 0.63 0.252  4.78 1.32 
           
23.2 11.9 28.8 6.32 2.05 1.47 2.28 1.07 0.577  5.14 3.19 
27.2 14.0 33.8 7.43 2.03 1.46 2.27 1.06 0.575  6.10 3.77 
34.8 17.7 43.0 9.57 2.01 1.44 2.23 1.05 0.569  7.93 4.89 
           
40.5 14.4 46.6 8.36 2.37 1.42 2.55 1.08 0.435  8.01 3.81 
52.0 18.4 59.6 10.8 2.35 1.40 2.52 1.07 0.430  10.4 4.95 
           
44.2 30.8 60.0 14.3 2.34 1.95 2.72 1.33 0.743  8.3 6.4 
56.9 39.5 77.7 18.9 2.32 1.93 2.69 1.33 0.738  10.9 8.4 
68.6 47.5 93.2 22.9 2.29 1.91 2.67 1.32 0.733  13.3 10.2 KS 572: 1986            ©KEBS  
16 TABLE 12.  UNEQUAL ANGLES ( cont’d .) (SEE FIGURE 6)  
 
DESIGNATION   
LEG 
LENGTHS  
 
 
THICKNESS  
t   
RADIUS  
 
MASS/UNIT  
LENGTH  
 
AREA OF  
SECTION   
DISTANCE OF 
CENTRE OF 
GRAVITY  
Size Thickness  B D Root  
r1 Toe 
r2 cx cy 
(1) (2) (3) (4) (5) (6) (7) (8) (9) (10) (11) 
mm mm mm mm mm mm mm kg/m  cm2 cm Cm 
65x50  5 65 50 5 6 2.7 4.35 5.54 1.99 1.25 
65x50  6 65 50 6 6 2.7 5.16 6.58 2.04 1.29 
65x50  7 65 50 8 6 2.7 6.75 8.60 2.11 1.37 
           
75x50  6 75 50 6 7 2.7 5.65 7.19 2.44 1.21 
75x50  8 75 50 8 7 2.7 7.39 9.41 2.52 1.29 
           
75x65  6 75 65 6 7 2.7 6.35 8.09 2.20 1.71 
75x65  8 75 65 8 7 2.7 8.33 10.61  2.28 1.79 
75x65  10 75 65 10 7 2.7 10.25  13.05  2.36 1.86 
           
80x60  6 80 60 6 8 4.8 6.37 8.11 2.47 1.40 
80x60  8 80 60 8 8 4.8 8.34 10.6 2.55 1.56 
           
100x65  7 100 65 7 10 4.8 8.77 11.2 3.23 1.51 
100x65  8 100 65 8 10 4.8 9.94 12.7 3.27 1.55 
100x65  10 100 65 10 10 4.8 12.3 15.6 3.36 1.63 
           
100x75  8 100 75 8 10 4.8 10.6 13.5 3.10 1.87 
100x75  10 100 75 10 10 4.8 13.0 16.6 3.19 1.95 
100x75  12 100 75 12 10 4.8 15.4 19.7 3.27 2.03 
           
125x75  8 125 75 8 11 4.8 12.2 15.5 4.14 1.68 
125x75  10 125 75 10 11 4.8 15.0 19.1 4.23 1.76 
125x75  12 125 75 12 11 4.8 17.8 22.7 4.31 1.84 
 
TABLE 12. UNEQUAL ANGLES ( Cont’d) (see FIGURE 6)  
 
  
SECOND MOMENT OF AREA  
 RADIUS OF GYRATION   
ANGLE  
α ELASTIC 
MODULUS  
SIZE   
About  
X-X  
About  
Y-Y 
  
About  
U-U  
About  
V-V 
  
About  
X-X 
  
About  
Y-Y  
About  
U-U 
  
About  
V-V 
  
About  
X-X  
About  
Y-Y 
 
 (12) (13) (14) (15) (16) (17) (18) (19) (20) (21) (22) 
mm cm4 cm4 cm4 cm4 cm cm cm cm tan α  cm3 cm3 
 51.4 24.8 62.8 13.4 2.52 1.75 2.78 1.29 0.547  9.29 5.49 
 66.3 31.8 80.8 17.3 2.50 1.73 2.76 1.28 0.544  12.2 7.16 
 113 37.6 128 22.0 3.17 1.83 3.39 1.40 0.415  16.6 7.53 
 127 42.2 144 24.8 3.16 1.83 3.37 1.40 0.414  18.9 8.54 
 154 51.0 175 30.1 3.14 1.81 3.35 1.39 0.410  23.2 10.5 
 133 64.1 163 34.6 3.14 2.18 3.47 1.60 0.547  19.3 11.4 
 162 77.6 197 42.1 3.12 2.16 3.45 1.59 0.544  23.8 14.0 
 189 90.2 230 49.5 3.10 2.14 3.32 1.59 0.540  28.0 16.5 
 247 67.6 274 41.1 4.00 2.09 4.20 1.63 0.356  36.5 14.3 
 302 82.1 334 50.0 3.97 2.07 4.18 1.62 0.356  36.5 14.3 
 354 95.5 391 58.8 3.95 2.05 4.15 1.61 0.353  43.2 16.9 
 ©KEBS             KS 572: 1986  
 
17  TABLE 12. UNEQUAL ANGLES ( cont’d ) (see FIGURE 6 ) 
 
 
DESIGNATION   
LEG 
LENGTHS  
 
 
THICKNESS  
t  
RADIUS  
 
MASS/UNIT  
LENGTH   
AREA OF  
SECTION   
DISTANCE OF 
CENTRE OF 
GRAVITY  
 
Size  
Thickness   
B  
D  
Root  
r1 
  
Toe 
r2 cx cy 
(1) (2) (3) (4) (5) (6) (7) (8) (9) (10) (11) 
mm mm mm mm mm mm mm mm cm2 cm cm 
150x75  10 150 75 10 11 4.8 17.0 21.6 5.32 1.61 
150x75  12 150 75 12 11 4.8 20.2 25.7 5.41 1.69 
150x75  15 150 75 15 11 4.8 24.8 31.6 5.53 1.81 
           
150x90  10 150 90 10 12 4.8 18.2 23.2 5.00 2.04 
150x90  12 150 90 12 12 4.8 21.6 27.5 5.08 2.12 
150x90  15 150 90 15 12 4.8 26.6 33.9 5.21 2.23 
           
200x100  10 200 100 10 15 4.8 23.0 29.2 6.93 2.01 
200x100  12 200 100 12 15 4.8 27.3.  34.8 7.03 2.10 
200x100  15 200 100 15 15 4.8 33.7 43.0 7.16 2.22 
           
200x150  12 200 150 12 15 4.8 32.0 40.8 6.08 3.61 
200x150  15 200 150 15 15 4.8 39.6 50.5 6.21 3.73 
200x150  18 200 150 18 15 4.8 47.1 60.0 6.33 3.85 
 
 
TABLE 12. UNEQUAL ANGLES ( Cont’d ) (see FIGURE 6)  
 
 
SIZE   
SECOND MOMENT OF AREA  
  
RADIUS OF GYRATION   
ANGLES  
α  
ELASTIC 
MODULUS  
About  
X-X About  
Y-Y About  
U-U About  
V-V About  
X-X About  
Y-Y About  
U-U About  
V-V About  
X-X About  
Y-Y 
 (12) (13) (14) (15) (16) (17) (18) (19) (20) (21) (22) 
mm cm4 cm4 cm4 cm4 cm cm cm cm tan α  cm3 cm3 
 501 85.8 532 55.3 4.81 1.99 4.96 1.60 0.261  51.8 14.6 
589 99.9 624 64.9 4.79 1.97 4.93 1.59 0.259  61.4 17.2 
713 120 754 78.8 4.75 1.94 4.88 1.58 0.254  75.3 21.0 
           
533 146 591 88.3 4.80 2.51 5.05 1.95 0.360  53.3 21.0 
627 171 694 104 4.77 2.49 5.02 1.94 0.358  63.3 24.8 
761 205 841 126 4.74 2.46 4.98 1.93 0.354  77.7 30.4 
           
1 220  210 1 290  135 6.46 2.68 6.65 2.15 0.263  93.2 26.3 
1 440  247 1 530  159 6.43 2.67 6.63 2.14 0.262  111.0  31.3 
1 758  299 1 863  194 6.40 2.64 6.58 2.13 0.259  137.0  38.4 
           
1 652  803 2 024  431 6.36 4.44 7.04 3.25 0.552  119.0  70.5 
2 022  979 2 475  527 6.33 4.40 7.00 3.23 0.550  147.0  86.9 
2 376  1 146  2 902  620 6.29 4.37 6.95 3.21 0.548  174.0  103.0  
 
 
 
 
 
 
 KS 572: 1986            ©KEBS  
18  
 
 
©KEBS                    KS 572: 1986 s  
19  
TABLE 13. CHANNELS ( see FIGURE 7)  
 
 
 
 KS 572: 2017                                                                                                           ©KEBS  
20 TABLE 13. CHANNELS ( Cont’d ) (see FIGURE 7)  
 
 
DEPTH  
BETWEEN  
FILLETS  
d  
CENTROID  
 
 
Cy  
SECOND MOMENT OF  
AREA   
RADIUS OF GYRATION   
ELASTIC MODULUS   
RATIO  
D/T About  
X-X About  
Y-Y About  
X-X About  
Y-Y About  
X-X About  
Y-Y 
(10) (11) (12) (13) (14) (15) (16) (17) (18) 
mm cm cm4 cm4 cm cm cm3 cm3  
47.4 1.43 102 18.0 3.12 1.30 25.6 5.85 10.7 
66.1 1.51 200 27.2 3.91 1.44 40.0 7.77 12.5 
84.7 1.60 350 39.5 4.68 1.57 58.4 10.1 14.1 
101.6  1..68  570 55.3 5.45 1.67 81.4 12.8 15.6 
119.2  1.81 900 79.0 6.22 1.81 113 16.8 16.0 
136.0  1.90 1 320  105 6.98 1.94 147 20.6 17.1 
150.0  2.02 1 930  142 7.75 2.10 193 26.0 17.4 
168.7  2.11 1 640  183 8.50 2.23 240 31.0 18.3 
193.6  2.20 4 000  240 9.63 2.36 320 38.2 19.2 
235.8  2.60 7 800  452 11.6 2.80 520 61.1 20.0 
282.0  2.48 11 900  492 13.4 2.74 678 66.3 21.9 
328.2  2.38 17 200  541 15.2 2.68 858 71.0 23.5 KS 572: 2017                    ©KEBS  
 
21 TABLE 14.  MILD STEEL FLATS  
 
 
DESIGNATION   
MASS/UNIT LENGTH  
  
WIDTH   
THICKNESS   
AREA  OF SECTION  
mm kg/m  mm mm cm2 
16x3  0.35 16 3 0.48 
16x4     
16x6  0.75 16 6 0.96 
16x8  1.0 16 8 1.28 
16x10`  1.26 16 10 1.60 
16x12  1.51 16 12 1.92 
     
20x3  0.47 20 3 0.60 
20x4      
20x6  0.94 20 6 1.2 
20x8  1.26 20 8 1.6 
20x10  1.57 20 10 2.0 
20x12  1.88 20 12 2.4 
20x15  2.36 20 15 3.0 
     
25x3  0.59 25 3 0.75 
25x4      
25x6  1.18 25 6 1.50 
25x8  1.57 25 8 2.0 
25x10  1.96 25 10 2.5 
25x12  2.36 25 12 3.0 
25x15  2.94 25 15 3.75 
     
30x3  0.71 30 3 0.9 
30x4     
30x6  1.41 30 6 1.8 
30x8  1.88 30 8 2.4 
30x10  2.36 30 10 3.0 
30x12  2.83 30 12 3.6 
30x15  3.53 30 15 4.5 
30x20  4.71 30 20 6.0 
 
     
     
40x3  0.94 40 3 1.2 
40x4     
40x6  1.88 40 6 2.4 
40x8 2.51 40 8 3.2 
40x10  3.14 40 10 4.0 
40x12  3.77 40 12 4.8 
40x15  4.71 40 15 6.0 
40x20  6.28 40 20 8.0 
     
 
TABLE 14.  MILD STEEL FLATS ( Cont’d ) 
 
DESIGNATION  MASS/UNIT LENGTH  WIDTH  THICKNESS  AREA OF SECTION  
     
50x3  1.18 50 3 1.5 
50x4     
50x5  1.96 50 5 2.5 
50x6  2.36 50 6 3.0 
50x8  3.14 50 8 4.0 
50x10  3.93 50 10 5.0 
     
50x12  4.17 50 12 6.0  KS 572: 2017                     ©KEBS  
22 50x15  5.89 50 15 7.5 
50x20  7.85 50 20 10.0 
50x25  9.81 50 25 12.5 
50x30  11.8 50 30 15.0 
     
60x5  2.36 60 5 3.0 
60x6  2.83 60 6 3.6 
60x8  3.77 60 8 4.8 
60x10  4.71 60 10 6.0 
60x12  5.65 60 12 7.2 
60x15  7.07 60 15 9.0 
60x20  9.42 60 20 12.0 
60x25  11.8 60 25 15.0 
60x30  14.1 60 30 18.0 
     
65x5  2.55 65 5 3.25 
65x6  3.06 65 6 3.9 
65x8  4.08 65 8 5.2 
65x10  5.10 65 10 6.5 
65x12  6.12 65 12 7.8 
65x15  7.65 65 15 9.75 
65x20  10.2 65 20 13.0 
65x25  12.8 65  16.25  
65x30  15.3 65 30 19.5 
65x40  20.4 65 40 26.0 
     
70x5  2.75 70 5 3.5 
70x6  3.30 70 6 4.2 
70x8  4.40 70 8 5.6 
70x10  5.50 70 10 7.0 
70x12  6.59 70 12 8.4 
70x15  8.24 70 15 10.5 
70x20  11.0 70 20 14.0 
70x25  13.7 70 25 17.5 
     
70x30  16.5 70 30 21.0 
70x40  22.0 70 40 28.0 
     
75x5  2.94 75 5 3.75 
75x6  3.53 75 6 4.5 
75x8  4.71 75 8 6.0 
75x10  5.89 75 10 7.5 
75x12  7.07 75 12 9.0 
 
TABLE 14.  MILD STEEL FLATS ( Cont’d ) 
 
DESIGNATION  MASS/UNIT LENGTH  WIDTH  THICKNESS  AREA OF SECTION  
75x15  8.83 75 15 11.25  
75x20  11.8 75 20 15.0 
75x25  14.7 75 25 18.75 
75x30  17.7 75 30 22.5 
75x40  23.6 75 40 30.0 
     
80x5  3.14 80 5 4.0 
80x6  3.77 80 6 4.8 
80x8  5.02 80 8 6.4 
80x10  6.28 80 10 8.0 
80x12  7.54 80 12 9.6 
80x15  9.42 80 15 12.0 
80x20  12.6 80 20 16,0 ©KEBS                                                                                                    KS 572: 1986  
 
23  80x25  15,7 80 25 20,0 
80x30  18.8 80 30 24.0 
80x40 25.1 80 40 32.0 
     
90x5  3.53 90 5 4.5 
90x6  4.24 90 6 5.4 
90x8  5.65 90 8 7.2 
90x10  7.07 90 10 9.0 
90x12  8.48 90 12 10.8 
90x15  10.6 90 15 13.5 
90x20  14.1 90 20 18.0 
90x25  17.7 90 25 22.5 
     
90x30  21.2 90 30 27.0 
90x40  28.3 90 40 36.0 
90x50 35.3 90 50 45.0 
     
100x5  3.93 100 5 5.0 
100x6  4,71 100 6 6.0 
100x8  6.28 100 8 8.0 
100x10  7.85 100 10 10.0 
100x12  9.42 100 12 12.0 
100x15  11.8 100 15 15.0 
100x20  15.7 100 20 20.0 
100x25  19.6 100 25 25.0 
100x30  23.6 100 30 30.0 
100x40  31.4 100 40 40.0 
100x50  39.4 100 50 50.0 
     
120x6  5.65 120 6 7.2 
120x8  7.54 120 8 9.2 
120x10  9.42 120 10 12.0 
120x12  11.3 120 12 14.4 
120x12  11.3 120 12 14.4 
120x15  14.1 120 15 18.0 
120x20  18.8 120 20 24.0 
120x25  23,6 120 25 30.0 
120x30  28.3 120 30 36.0 
120x40  37.7 120 40 48.0 
120x50  47.1 120 50 60.0 
     
130x6  6.12 130 6 7.8 
130x8  6.12 130 8 10.4 
130x10  10.2 130 10 13.0 
TABLE 14.  MILD STEEL FLATS ( Cont’d ) 
 
 
DESIGNATION   
MASS/UNIT LENGTH  
  
WIDTH   
THICKNESS   
AREA OF SECTION  
130x12  12.2 130 12 15.6 
130x15  15.3 130 15 19.5 
130x20  20.4 130 20 26.0 
130x25  25.6 130 25 32.5 
130x30  30.6 130 30 39.0 
130x40  40.8 130 40 52,0 
130x50  51.2 130 50 65.0 
     
140x6  6.59 140 6 8.4 
140x8  8.79 140 8 11,2 
140x10  11.0 140 10 14,0 
140x12  13.2 140 12 16,8  KS 572: 2017                     ©KEBS  
24 140x15  16.5 140 15 21.0 
140x20  22.0 140 20 28.0 
140x25  27.5 140 25 35,0 
140x30  33.0 140 30 42.0 
140x40  44.0 140 40 56,0 
140x50  55.0 140 50 70.0 
     
150x6  7.07 150 6 9.0 
150x8  9.42 150 8 12.0 
150x10  11,8 150 10 15.0 
150x12  14.1 150 12 18.0 
150x 15 17.1 150 15 22.5 
150x20  23.6 150 20 30.0 
150x25  29.4 150 25 37.5 
150x30  35.3 150 40 60.0 
150x50  58.9 150 50 75.0 
     
 
 
 
 
 KS 572: 1986                              ©KEBS  
 
25 A P P E N D I X  A  
TENSILE TESTS RESULTS SHEET  
CUSTOMER:  TEST CERTIFICATE NO  DATE  
MATERIAL:  RATE OF LOADING:   
 
SAMPLE  PREPARED TEST PIECE  YIELD  SPECIFIED 
CHARACTERISTIC 
STRENGTH  
REQUIREMENT  
NO Size of 
Section  
 
 
mm 
 Section 
Shape  
 
mm Width  
 
 
mm Thickness  
 
 
mm Gauge 
Length  
 
mm Cross 
Sectional 
Area  
mm2 Load  
 
 
kN Stress  
 
 
N/mm2 Stress  
 
 
N/mm2 Std 
 
 
N/mm2 93 % 
min. 
 
 
N/mm2 
(1) (2) (3) (4) (5) (6) (7) (8) (9) (10) (11) (12) 
            
            
            
            
            
            
            
            
            
            
            
            
            
ULTIMATE TENSILE  INCREASE 
FROM YIEL D 
 
Per cent  GAUGE  LENGTH  ELONGATION  
Load  
 
kN Stress  
 
N/mm2 Initial  
 
mm Final  
 
mm Extn.  
 
mm Per cent  Remarks  
(13) (14) (15) (16) (17) (18) (19) (20) 
        
        
 
 KS 572: 1986                              ©KEBS  
 
26 A P P E N D I X  B  
 
VARIATION OF MASS RESULTS SHEET  
   
SAMPLE   
LENGTH  
 
 
 
 
 
 
                       
m 
  
AREA   
MASS  
 
 
 
 
 
 
 
kg  
MASS/m   
VARIATION   
AVERAGE  
VAR 
 
 
 
 
 
Per  cent   
PERMISSIBLE  
VARIATION   
OTHER 
REMARKS  
 
NO. Size 
 
 
 
      
 mm Section 
Shape  Nominal  
 
 
 
 
 
mm2 Actual  
 
 
 
 
 
mm2 ACTUAL  
 STD 
 
 
  
 
  
 
 
  
 
 
 
 
Per 
cent  
 
 
 
 
Per 
cent  
 
kg  
kg  
kg  
Per 
cent