Background Knowledge - Strengthening Design of Reinforced Concrete with FRP - page 39

TABLE A-2
A Few Years Ago, the Metric Equivalents Were Given Nominal Size Names,
But They Were Redesignated. It Used to Run 5, 10, 15, 20 on to 55 in
Increments of 5. But Then Someone Decided Otherwise
Here's what they used to be called:

Imperial Size Former Metric Name Current Metric Name

No. 2 No. 5 No. 6

No. 3 No. 10 No. 10

No. 4 not used No. 13

No. 5 No. 15 No. 16

No. 6 No. 20 No. 19

No. 7 not used No. 22

No. 8 No. 25 No. 25

No. 9 No. 30 No. 29

No. 10 not used No. 32

No. 11 No. 35 No. 36

No. 14 No. 45 No. 43

No. 18 No. 55 No. 57

REFERENCES
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Committee 318. Farmington Hills, MI.
ACI SP-55. 1978. Detroit: American Concrete Institute.
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Charkas, H., H. A. Rasheed, and H. G. Melhem. 2003. Rigorous procedure for calculating
deflections of FRP-strengthened RC beams. ACI Structural Journal 100 (4): 529-39.
Hognestad, E. 1951. A study of combined bending and axial load in reinforced concrete mem-
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Park, R., and T. Paulay. 1975. Reinforced concrete structures . New York: John Wiley and Sons.
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