Asa Rebar Shapes
Nisha Heidinger
I was working on my project. And when I had to add reinforcement to my elements it used to show up smoothly. I used to click Rebar > then Choose Rebar shape I want to use > then simply add it to any element in my section view. But after I needed to work with different project templates "US Metric" after I am done drawing my elements like before I wanted to add Rebar. But this time it showed me a message says "No Rebar Shape family is loaded in the project Would you like to load one now?" When I clicked Yes and picked from Libraries I have in my "US Imperial" > picked Structural Rebar Shapes but I only found 2 Rebar shapes files in there 01.rfa and 04.rfa . So, I loaded both of them and they are all I can use.
When I faced this problem I said maybr this is all because I am using different project template and now I should use the first one I used which was "Construction Template". But when I did use the old template it had no Rebar Shapes either and it asked me to load. Thank god one of the projects was finished I opened it and checked if the problem applies to old revit project. But no it has its Rebar Shapes family and then I decided using my old project as a template since it doesnt have that problem.
Our company is specializing in manufacturing and selling reinforcing bars. From 20 years experience, we know clearly that it is inconvenient for our customers to cut and bend the straight themselves. In order to implement the propose of serving our customers, we purchase advanced rebar bending machines to make sure the products satisfy out customers. The rebars are bended according to BS4466-1989, BS8666-2000, BS8666-2005.
Wennian focuses on providing superior quality, strong and durable reinforcing bar, including black rebar, epoxy coated rebar, galvanized rebar, stainless steel rebar and processed rebar in different types, standards, shapes and sizes. Custom rebar is also available.
Hello, I'm structure engineer and this is my first thread. I've noticed there is an issue with Revit with snapping some rebar shapes specially hooked ones with dimensions although there is many terrific features regarding rebars in Revit 2024 which I'm using now but this feature still missing and I hope you fix that soon in new versions... The problem is when I draw any rebar shape with hooks ( 11, 21 or 23 ) L, U or Z shape, I can not snap its end when I want to put dimensions on plan while I'm doing shop drawing of Raft foundation or slab.. only dimension can detect 0 shape ( straight bar ) ... Dimensions are very important in plan view for splice/Development length.. pls check attached video for more clarifications however I can try to get a temporary solution by putting a line over the bar to put dimension but this is annoying when I have to do all this with most L & U or Z bars on plan ... thank you
This is a current limitation for rebar shapes with multiple segments in views where the bar plane is perpendicular to the view plane. Unfortunately, the only workaround is to draw a detail line over the bar, like you mentioned.
I've just added a reply to similar issue in another thread. A possible way to solve this dimension issue is to avoid using multiple segment bar shapes in a first place. You can model bars with hooks at ends in case of typical L- or Ubars. This way it makes it possible to dimension to bar ends & hook tips
you likely model typical U or Lbars as multiple segment bars. You're not using hooks (see here). Currently, one of the segments is perpendicular to your view, hence the limitation you're experiencing when unable to snap to the end of the bar. However, if you define you rebar shape with a hook at start/end (e.g. 90deg hook pointing up/ down for a typical slab edge Lbar), the dimension will snap to the other end
Shape Code 99
All other shapes To be calculated See Note 2.Where standard shapes cannot be used.No other shape code number, form of designation or abbreviation shall be used in scheduling. A dimensioned sketch shall be drawn over the dimension columns A to E. Every dimension shall be specified and the dimension that is to allow for permissible deviations shall be indicated in parenthesis, otherwise the fabricator is free to choose which dimension shall allow for tolerance.Shape Code 32A +B +C +(D) -1.5r -3dNeither A nor (D) shall be less thanP in Table 2.
The dimensions in parentheses are the free dimensions. If a shape given in this table is required but a different dimension is to allow for the possible deviations, the shape shall be drawn out and given the shape code 99 and the free dimension shall be indicated in parentheses.The length of straight between two bends shall be at least 4d, see Figure 6. Figure 4, Figure 5 and Figure 6 should be used in the interpretation of ending dimensions.
The length equations for shape codes 14, 15, 25, 26, 27, 28, 29, 34, 35, 36 and 46 are approximate and where the bend angle is greater than 45, the length should be calculated more accurately allowing for the difference between the specified overall dimensions and the true length measured along the central axis of the bar. When the bending angles approach 90, it is preferable to specify shape code 99 with a fully dimensioned sketch.
Stock lengths are available in a limited numer of lengths (e.g. 6m, 12m). Dimension A for shape code 01 should be regarded as indicative and used for the purpose of calculating total length. Actual delivery lengths should be by agreement with supplier.
Pilot Steel specializes in the manufacturing of custom bent reinforcing bars. Over the course of selling rebar for 25 years, we realize that it is a major inconvenience for our customers to cut and bend straight bars themselves. In order to satisfy our customers special project needs, we utilize state of the art rebar bending equipment to create a vast array of specialty bends. The drawing shapes displayed are the more common, industry standard bends we manufacture.
Serving the South Florida construction market for over 25 years, Pilot Steel is a leading fabricator of reinforcing steel. We are also one of the area's largest suppliers of building accessories and wire mesh products.
Shape Code 12: This code represents an L-shaped rebar with a circular bend that forms a gap at the bent part. These descriptions highlight the difference between shape code 12, which features a circular gap in the bend of the L-shaped rebar, and shape code 11, which does not have this circular gap.
The term stirrups is usually applied to lateral reinforcement in flexural members and the term ties to lateral reinforcement in vertical compression members.
In uniaxial compression test of concrete, upon reaching the ultimate load failure of concrete occurs where major cracks line up in the vertical direction and the concrete cube would be split up. The development of vertical cracks involves the expansion of concrete in lateral directions. In case the concrete is confined in lateral directions, it was observed that the formation of vertical cracks would be hindered as indicated in past experiments. As a result, the concrete strength is increased with also a rise in failure strain.
The above theory is often used in the design of bridge columns. Steel stirrups are installed at around the vertical main reinforcement. Other than the function of shear reinforcement, it helps to avoid the lateral deformation of interior concrete core so that the strength of concrete column is increased.
Also , Open stirrups are provided principally to resist shear forces in concrete beams and they are applied in locations in which the effect of torsion is insignificant. U-shaped stirrups are placed in the tension side of concrete beams in which shear cracks would occur. However, when concrete beams are designed to resist a substantial amount of torsion, closed stirrups should be used instead.
Concrete beams vary in depth. The deeper the beam, the more shear capacity. When the depth is not adequate, steel stirrups must be added to increase the shear capacity of the beam. These stirrups are usually one piece of steel that is bent into a rectangular shape. Often small diameter steel is used, such as #3 and #4 rebar. The stirrup typically wraps around the bottom and top bars of the beams.
Corner bars are typically used to reinforced the corners of slabs and to tie together vertical and horizontal pieces of rebar.
STANDARD BEND TYPES (OPEN SHAPES)
- STANDARD BEND TYPES (CLOSED SHAPES)
STANDARD BEND TYPES (OPEN SHAPES)
Rebar, collectively referred to as reinforcing steel or reinforcement steel, is an essential component in construction, specifically in creating reinforced concrete and masonry structures. These steel bars are strategically placed within concrete to act as a tension device, significantly enhancing the concrete's tensile strength. While concrete exhibits high compressive strength, it inherently lacks the ability to withstand tension effectively. The introduction of rebar compensates for this shortfall, ensuring that the concrete can endure various stresses and strains without cracking or failing. This reinforcement method is fundamental in modern construction, providing the necessary support and durability for buildings, bridges, roads, and other structures that require a combination of strength, flexibility, and longevity.
All rebars are needed, this way we know how many rebars are needed and if they all fit properly into the host element. We use a schedule that automatically draws the shape with all the dimensions, hooks, etc. If this information is lost that means the new model or new loaded elements are not the same as the original.
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