C-Beam Design - AISC 360 ASD
This output contains a complete description of individual Castellated C-Beam™ designs. Size, hole configuration, studs, loads, and design checks are included. The report for Cellular C-Beam is similar.
Page Heading
The heading contains information about RAM Steel and the model that the output represents. It lists the current version of RAM Steel being used, the title of the output, the database name including the date and time it was created or last modified and the building and steel codes that were utilized in the design process. It may also include the licensee Company name and a project description.
Span Information
| Setting | Description |
|---|---|
| Beam Coordinates | These are the coordinates at the ends of the beam. |
| Duct Size Specified | If a duct size, for which the holes in the web must be large enough to accommodate, has been specified, it will be listed. H and B represent the vertical dimension and width dimension, respectively, of a rectangular duct, and Diam represents the diameter of a round duct. |
| Beam Depth Limitation Specified | If a beam depth limitation has been specified, it will be listed. |
| Beam Size | This is the designed beam size. It is either the optimum size selected by RAM Steel or the user-specified size. |
| Steel Yield Strength (Fy) | This is the user selected yield strength for the beam. |
| Top | This is the size of the wide flange beam from which the top piece of the C-Beam is made. |
| Bottom | This is the size of the wide flange beam from which the bottom piece of the C-Beam is made. |
| dt | This represents the distance from top of flange to top of opening. |
| emin, emax | For an optimized beam this represents the range of acceptable e values. |
| e | This represents a specified e value. |
| phi top | This represents the range of angles for the top castellation. A user-specified phi represents an angle of the top castellation. |
| phi bottom | This represents the range of angles for the bottom castellation. A user-specified phi represents an angle of the bottom castellation. |
| b | This represents the adjacent edge of the angled side of the castellated opening. |
| Tee Depth at Web Post | This represents the tee depths at the web post. |
| Depth | This represents the total depth of the C-Beam. For Cellular beams, a range of depth corresponds to a range of spacing. Castellated beam depths do not change with the range of e. |
| Connection Type | This is the connection type designated for this beam, for both the Left and Right (I and J) ends of the beam. |
| Total Beam Length | This is the total length of the beam measured from the center line of supports. |
Opening Data
| Setting | Description |
|---|---|
| Center of First Opening from I-End | This the distance of the centerline of the first opening measured from the I-End of the beam |
| Center of Last Opening from J-End | This the distance of the centerline of the last opening measured from the J-End of the beam |
| Number of openings in beam | This the number of openings in the beam. |
| Infill location | This the distance of the centerline of openings with infills measured from the I-End of the beam. |
| Location of Transfer Columns | This the distance of the centerline of transfer columns measured from the I-End of the beam |
Geometric Error
These are geometric error warnings resulting from an analyzed user specified geometry.
| Setting | Description |
|---|---|
| Castellated Beams |
2h/e > 8 e/tw > 30 dt > 0.5 depth dt < tf + 1.0 in h/tw > 970/sqrt(Fy) phi < 58 Deg. phi > 62 Deg. |
| Cellular Beams |
e > 3.0 in S/D < 1.08 S/D > 1.50 depth/D < 1.25 depth/D > 1.75 dt < tf + 1.0 in h/tw > 970/sqrt(Fy) |
Composite Properties (for composite design)
| Setting | Description |
|---|---|
| Stud Capacity (Qn) | This is the shear capacity of a single shear stud. When multiple rows of studs are required, the shear capacity of a stud in a single row is indicated by Qn[1], that of a stud in a double row by Qn[2], and that of a stud in a triple row by Qn[3]. |
Shear (Ultimate) - Gross
| Setting | Description |
|---|---|
| Max Vu | This represents the maximum factored shear force in the member. |
| Vn | This represents the nominal shear capacity of the member. |
| ΩVu/Vn | This represents the ratio of the actual shear to the shear capacity. |
Shear (Ultimate) - Net
| Setting | Description |
|---|---|
| Max Vu | This represents the maximum factored shear force at any hole in the member. |
| Vu | This represents the portion of MaxVu carried by the tee. A value for both the top and the bottom tee are listed. |
| Vn | This represents the nominal shear capacity of the tee. A value for both the top and the bottom tee are listed. |
| ΩVu/Vn | This represents the ratio of the actual shear to shear capacity of the tee. A value for both the top and the bottom tee are listed. |
Shear (Ultimate) - Horizontal
| Setting | Description |
|---|---|
| Max Vave | This represents the maximum average shear force between any two adjacent holes, used in Method 3 for noncomposite and precomposite. |
| Vu | This represents the actual shear force on the web post, corresponding to the Method indicated. |
| Control Vu | This represents the worst shear force, of any of the three methods, on the web post. |
| Vn | This represents the nominal shear capacity of the web post. |
| ΩVu/Vn | This represents the ratio of the actual shear to shear capacity of the web post. |
Web Post Buckling
| Setting | Description |
|---|---|
| Max Vu | This represents the maximum shear force in the web post. |
| Mu | This represents the maximum factored design moment on the web post. |
| Mp | This represents the plastic moment capacity of the web post. |
| Mocr | This represents the critical moment capacity of the web post. |
| Ω |
This represents the Ω factor used to reduce the nominal moment capacity, Mn. |
| Mn | This represents the nominal moment capacity of the web post. |
| ΩMu/Mn | This represents the ratio of the actual moment-to-moment capacity on the web post. |
Viereendel
| Setting | Description |
|---|---|
| Vc | This represents the shear capacity of the concrete on the beam (composite beams only). |
| Vu | This represents the shear in the beam at the controlling hole. |
| Mu | This represents the moment in the beam at the controlling hole. |
| Pu | This represents the axial force in the tee. |
| Mu | This represents the bending moment in the tee. The values from the primary moment and the secondary moment are listed, as well as the total of those two values. |
| Pn | This represents the nominal axial capacity in the tee. |
| H1-1a, H1-1b | This represents the interaction equation results for the tee. |
Moments
This section gives the magnitude and location of the maximum positive and negative moments with the associated stresses.
| Setting | Description | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Span | This indicates the span for which the values are being listed, which is always listed as Center since cantilevers are not allowed for C-Beam. | ||||||||||
| Cond | This indicates the load condition. It includes:
|
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| LoadCombo | This is the controlling Load Combination for the indicated Condition. | ||||||||||
| Mu | This is the ultimate moment for the indicated Condition and Load Combination. | ||||||||||
| @ | This is the location of the indicated moment, measured from the left end of the beam. | ||||||||||
| Lb | This is the unbraced length for the segment containing the indicated moment. If the compression flange is fully braced throughout the segment, Lb is indicated with "0.0", meaning there is no unbraced length to be considered. Listed for noncomposite beams only. | ||||||||||
| Cb | This is the Bending Coefficient. Listed for noncomposite beams only. | ||||||||||
| Ω | This is the Resistance Factor. Listed for noncomposite beams only. | ||||||||||
| Mn/Ω | This is the design strength of the segment. Listed for noncomposite beams only. | ||||||||||
| Controlling | This is the controlling set of values. Listed for noncomposite beams only. |