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The Global Insight

What is the diameter of a #5 bar?

Author

Christopher Davis

Updated on April 05, 2026

Physical Characteristics of #5 Rebar:

Imperial Bar Size“Soft” Metric SizeNominal Diameter
#5#160.625 in. = 5/8 in.

What is the diameter of a #6 rebar?

0.75 inches
Physical Characteristics of #6 Rebar: Nominal diameter: 0.75 inches (19.05 millimeters) Nominal area: 0.44 square inches (284 square millimeters)

What does #5 rebar mean?

It’s actually quite easy. The number represents a unit of 1/8 of an inch. So that means a #4 rebar is 4 times 1/8″ or in other words – 1/2″. #5 bar is 5/8″; #6 bar is 3/4″ and so on.

What is the standard size of rebar?

Rebar Sizes We Stock:

Imperial Bar Size“Soft” Metric SizeNominal Diameter (in)
#5#160.625
#6#190.750
#7#220.875
#8#251.000

How do you calculate the number of bars in a footing?

Details Obtained from the Drawing

  1. Length of Footing = X = 2m.
  2. Breadth of Footing = Y = 1.6m.
  3. Height of the footing (Thickness) = h =0.3m.
  4. Diameter of the Main reinforcement bars = dm= 12mm.
  5. Diameter of Distribution Reinforcement Bars = dd =12mm.
  6. Spacing of Main reinforcement bars = sm = 150mm c/c.

How do you calculate bar spacing on a slab?

Minimum spacing between two bars can be taken as approximately 50–75 mm. According to cl. 26.5. 1.5 of IS 456, the maximum spacing of the stirrups = 0.75 d = 0.75 (450) = 337.5 mm = 300 mm (say)….Total Pageviews.

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What is the lap of #6 rebar?

6, 36 inches; No. 7, 42 inches; and No. 8, 48 inches. Be aware, however, that lap lengths are established in local building codes, which may not match the 530 requirements.

What is the size of #4 rebar?

12.7 mm
Physical characteristics of #4 Rebar:

Imperial Bar Size“Soft” Metric SizeNominal Diameter (Metric)
#4#1312.7 mm

Which is bigger #4 or #5 rebar?

The numbers range from #3 (smallest) to #18 (largest). For example, The #3 bar size is 3/8″ diameter of the solid section, #4 bar size is 4/8″ diameter of the solid section, and #5 bar size is 5/8″ diameter of the solid section.

What are the different sizes of concrete rebar?

The metric size is the same dimension expressed to the nearest millimeter. The sizes of the large bars are based on the square rebars formerly made. Size 9 has the same weight per foot and cross sectional area as a 1-inch square bar, size 10 as a 1 1/8-inch square bar, size 11 as a 1¼-inch square bar, size 14 as a 1½-inch square bar,…

What do the numbers on a concrete bar mean?

A letter or symbol identifying the mill that produced the bar. The bar size, which is a numeral. A symbol indicating the type of steel. for example, used to mean the bar was rolled from a new billet. See the table below. If the bar is grade 60 or 75, or metric 420 or 520, a mark indicating its grade.

What’s the difference between number 5 and 8 rebar?

Two styles of marking the grade are used. The size designations up through size 8 are the number of eighths of an inch in the diameter of a plain round bar having the same weight per foot as the deformed bar. So, for example, a number 5 bar would have the same mass per foot as a plain bar 5/8 inch in diameter.

What are the size of steel bars used for construction?

similarly, the size of steel bars having a diameter 25mm, 32mm and 36mm are used in the hydraulic structures like Dam, Bridge, aqueduct, Reservoiretc. Finally, we can say that whatever be the structure like column, beam, slab, foundation, RCC wall etc we use the following size of steel bars having diameter. 6mm 8mm