This document provides an introduction and overview of reinforcement bar (rebar), including: 1) It describes the different types of steel used for rebar based on carbon content, including mild steel. 2) It explains the differences between deformed bar and tor steel, with deformed bar being more cost effective. 3) It lists several top steel manufacturing companies in Bangladesh and the grades of rebar they produce. 4) It outlines the typical applications of Grade 40 and Grade 60 rebar and their differences in yield strength and ultimate strength.

1. Welcome To The Presentation Based On
REINFORCEMENT BAR

2. Course No –CE 208
Course Title– Quantity Surveying
Course Teacher- Safiqul Islam Sajib
Presented by-
Md. Mohotasimur Rahman
ID#10.01.03.040

3. INSTRUDUCING STEEL
 Commercial iron
,containing Carbon
in any amount up
to about 1.7
percent.
Steel in rack

4. TYPES OF STEEL
 Depending upon the percentage of
carbon, four grades of steel are –
Soft, Mild or Low 0.05-0.15%
Medium carbon steel 0.15-0.30%
Medium high carbon steel 0.30-0.60%
High carbon steel 0.60-1.50%

5. INTRODUCING MILD STEEL
 There are four type of steel
1. M.S. Angles
2. M.S. Channels
3. Plain Bars
4. Deformed Bars

6. DEFORMED BAR AND TOR STEEL
Deformed bar Tor Steel

7. DIFFERENCE BETWEEN TOR STEEL
& DEFORMED BAR
 Deformed bars save in
steel & lower
construction cost.
 The Ultimate Strength
of both Grade 60 &
Grade 40 Deformed
bar is minimum
90,000 PSI & 70,000
PSI respectively
 Tor Steel has higher
construction cost.
 By twisting Tor-Steel
gains Yield Strength of
Grade 60, but the
Ultimate Strength
remains at 70,000 PSI,
which is only equal to
Grade 40

8. STEEL MANUFACTURING
COMPANY IN BANGLADESH
Bangladesh have world class Steel
manufacturing companyies–
1) BSRM (Bangladesh Steels Re-Rolling Mills)
2) KSRM (Kabir Steels Re-Rolling Mills)
3) RSRM (Ratanpur Steels Re-Rolling Mills)
4) AKS (Abul Khair Steel Mills)
5) Anwar Ispat ltd.
6)GPH Ispat
7)BSI (Baizid Steel Industries )

9. PRODUCTS MANUFACTURING BY
BANGLADESHI COMPANY
 All steel company in Bangladesh
produce Grade 40 HSD Re and Grade
60 HSD Re.
 Some company produce some extra
products like BSRM has
BSRM Xtreme500W, KSRM has
KSRM500W, AKS has AKS TMT bar etc.
These bar’s Grade 72.5 HSD Re.

10. DIFFERENCE BETWEEN GRADE 60 HSD-Re &
GRADE 40 HSD-Re
GRADE 60 HSD Re GRADE 40 HSD Re
 Yield strength :60,000 PSI
 Ultimate strength :90,000
PSI
 Yield strength :40,000 PSI
 Ultimate strength :60,000
PSI
Stress
Strain
Stress vs Strain for Prime 40
Stress
Strain
Stress vs Strain for AKS
Grade 60
Tension test Result of AKS Grade 60 & Prime
Grade 40 was Tested in AUST laboratories

11. APPLICATION OF GRADE 60 AND
GRADE 60 BARS
Grade 60
 High way road
culverts, bridges &
flyover.
 High rise building
 Heavy load
bearing machinery
foundation
Grade 40
 Pile works
 lintel
 Falls wall
 Now -a –days this
grade deformed bar
is not available is
high rise buildings

12. GRADE 60 AND GRADE 40 BARS
Grade 60 Grade 40

13. GRADE 72.5 HSD Re
 AKS TMT bar, BRSM Xtreme 500W, KSRM
500W Q&T have the yield strength
72,500 PSI.
 TMT means thermo-mechanical
treatment and Q&T means Quenching
and tempering. By this technology AKS
TMT bar, BRSM Xtreme 500W, KSRM
500W Q&T are produced.

14. GRADE 72.5 HSD Re
AKS TMT bar BRSM Xtreme 500W
KSRM 500W Q&T

15. U.S. IMPERIAL SIZES
Bar
Designa
tion (#)
Nominal bar dia Nominal weight
inch mm lb/ft Kg/m
3 0.375 9.52 0.376 0.560
4 0.500 12.70 0.668 0.944
5 0.625 15.88 1.043 1.552
6 0.750 19.05 1.502 2.235
7 0.875 22.22 2.044 3.042
8 1.000 25.40 2.670 3.973
9 1.128 28.65 3.400 5.059
10 1.270 32.26 4.303 6.403

16. STRENGTH OF MATERIALS
LABORATORY REEPORT

17. Thanks for your
co- operation