What is hook length in reinforcement?
What is hook length in reinforcement?
The hook is the extra length left at the 4th corner of a stirrup so that the stirrup retains its shape. Generally, hook length is taken as 9d for one side. Where d = Diameter of the bar. The total length of stirrups = Total length of the bar + 2 x hook length (for two hooks)
What is the minimum hook length?
The Actual Length Of A Stirrup But, the hook length shouldn’t be less than 75mm. So, the hook length of our example stirrup is 75mm. But if you cut this length of a bar for making the stirrup, it’ll be bigger than the required size.
How do you determine hook length?
The below standards are most important in calculating the hook length and bend lengths at corners while finding cutting length of stirrups.
- 1 Hook length = 9d or 75mm.
- 45° Bend length = 1d.
- 90° Bend length = 2d.
- 135° Bend length = 3d.
How do you calculate the length of a reinforcement bar?
Example of Beam Reinforcement Calculation:
- Length of B1 = clear distance between walls + 2 x width of walls – 2 x bar cover + 2 x bend length.
- Length of bar B2: A + B + C = 4000 + 2 x 230 – 2 x 40 + (1.414xH – H)
- B2 = 4000 + 2 x 230 – 2 x 40 + (1.414×334 – 334) = 4518.3 = 4520mm.
How do you calculate lap length of steel?
Normally lap length is 50D meaning 50 times the bar diameter if both bars are of same diameter. When lapping two bars of different diameters, the lap length is considered as 50 times the smaller diameter.
What will be the weight of a 8.3 m length 12mm bar?
12mm rod weight:- 12mm rod supplied in U shaped bent or straight, a length of about 12 metres or 40 feet, generally 12mm rod weight around 10.667kg/ piece, 0.889kg/m or 0.270 kg/foot.
How do you calculate the length of a bar?
KNOW HOW TO CALCULATE THE CUTTING LENGTH OF BENT UP BARS
- Inclined Length = D/(sin 45°) – dD/ (tan 45°)
- = (D/0.7071) – (D/1)
- = (1D – 0.7071D)/0.7071.
- = 0.42 D.
What length is rebar sold in?
We stock a wide variety of rebar sizes from #3-#10; grades: 40, 60 and A706 (weldable); lengths: 20′, 30′, 40′ and 60′; and finishes: black, or epoxy.
Is 456 minimum cement content?
Thus, the minimum cement content specified ranges from 300 to 360 kg per cum of concrete for various exposure conditions and for various grades of concretes. The maximum cement content in concrete in normal course is also limited to 450 kg. per cum of concrete as per Para 8.2. 4.2 of IS 456.
Is codes used for RCC design?
IS 875 (Part 1 to 5) : 1987 – code of practice for design loads (other than earthquake) for buildings and structures (second revision). IS 1893: 2002 – criteria for earthquake resistant design of structure (fourth revision).
How big is a standard steel bar hook?
2 – Standard Hook Dimensions Standard Hook Dimensions 180° Hooks (mm) 90° Hooks (mm) Inch-Pound Bar Size Metric Bar Size D (mm) A or G J A or G #3 #10 2 ¼” (125) 5” (125) 3” (75) 6” (150) #4 #13 3” (80) 6” (150) 4” (100) 8” (200) #5 #16 3 ¾” (95) 7” (175) 5” (125) 10” (250)
How to calculate the length of a reinforcing bar?
For example, to take the bending radius into account and to calculate the length along the reinforcing bar outer surface, do the following: In Bending schedule fields, right-click in the L cell and select (formula) from the pop-up menu. The accuracy of reinforcing bar length is defined in the rebar_config.inp file.
What are the dimensions of a standard hook?
J D STANDARD HOOK DETAILS in accordance with ACI 318 Building Code All grades of steel (minimum yield strengths) © 2015 Concrete Reinforcing Steel Institute Made in U.S.A. 30BCARDSTD–15 RECOMMENDED END HOOK DIMENSIONS BAR SIZE D 180° HOOKS 90° HOOKS A or G J A or G #3 2¼˝0´- 5˝0´- 3˝0´- 6˝ #4 3˝0´- 6˝0´- 4˝0´- 8˝ #5 3¾˝0´- 7˝0´- 5˝0´- 10˝
Can you use epoxy coated wire for reinforcing bars?
Increase development lengths by 50% when epoxy coated wire is used, but this increase does not apply to the 6 in. (152 mm) minimum.. Reinforcing bars can also be spliced by welding, mechanical splicing and in some cases end-bearing splicing.