Understanding Beam Schedules, Sections, and Details: A Comprehensive Review

Understanding Beam Schedules, Sections, and Details in Structural Drawings

Explore the intricate details of sheet S401, focusing on the beam schedule, sections, and details, including width, depth, reinforcing, and remarks. Delve deeper into the specifics of beam diagrams, rebar extension, stirrup schedules, vertical beam penetration detail, and various types of stirrups.

Key Insights

  • The beam schedule provides essential data such as the mark, width in inches, depth, reinforcing, bottom bars, stirrups, and remarks. It serves as a comprehensive guide to understanding the construction and design of a beam.
  • Details relating to rebar extension in columns, stirrup schedules, and vertical beam penetration are carefully illustrated to provide a thorough understanding of the structural requirements and specifications in construction.
  • The document further breaks down different types of stirrups - type S and type D, explaining their placement, clearance requirements and the role they play in maintaining structural integrity.

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Let's spend some time reviewing sheet S401, the beam schedule, sections, and details. Let's begin by looking at the beam schedule. The beam schedule includes the mark, the width in inches, the depth, the reinforcing, where the bottom bars are and how many, top left (if needed), top right, stirrups (which are cages, and we'll learn more about that), and remarks.

Here is a typical beam diagram. You can see that this is a column under a structural grid, column at a structural grid, another column at a structural grid, and a projection, for example, like a balcony. There is a length between the face of the columns.

This shows that the rebar coming out of the column must extend a quarter of the length into the beam. Rebar is placed here against this column, 0.3 times the length of this. For an interior, we have 0.3 times the length, 0.3 times the length.

You can see that we have a class B lap, and then we have a length right here. There is a schedule for the stirrups that go from here into here, and we'll see the stirrups down here. An interior span, scheduled stirrups, and scheduled stirrups for a cantilever.

Here is the typical vertical beam penetration detail. It specifies an 8-inch diameter, sleeves are larger, and provides two J-hook bars at 6 inches on center, each side of the sleeve, centered about the sleeve, matching the bar size of typical beam stirrups. So that's what's going on in here, and they're saying three additional stirrups, 3 inches on each side of the sleeve, matching the size of beam stirrups. Then they have their note that's going on right here.

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There are three types of stirrups. There's a type S stirrup, where we have the floor, a beam, the floor continues. We have an end condition, followed by a much broader type D stirrup.

So you can see they're discussing the clearance requirements from the edge of the beam to the rebar. Typical stirrups on the sides. A stirrup is this shape, going up and over, down, up, and down.

It's going around this rebar here. And then we have this coming over and coming down. So you'll notice this comes straight down.

At the end condition here, it comes in. If we look at the detail here, detail at the ramp. Again, you can see we have a beam down here.

You can see how the reinforcing bars are coming in through here and the standard hooks at the end of the ramp beam. Here we have a section view through the ramp. We have coming up and over, a class B lap.

You can see a curb here at the edge, six inches horizontally and vertically. Callouts are provided for the rebar and the widths of the wall. There's a ramp concrete beam schedule.

There's the mark, the width, the depth, the kind of reinforcing, and information about the U-bars (reinforcing bars). These conditions here would be called the U-bars. So here it continues up over to there.

Now, pan down to this detail, detail at the ramp slab. You can see the dimensions. Callouts for top and bottom are provided, the size, and the hook around the beam.

You can see the cage configuration here. Once again, a class B lap. We have it here.

And you can see a pour joint because this system here would be poured separately from this system here. Here we have a trench drain. And you can again see the rebar.

It discusses the spacing on either side of the trench drain. It talks about waterproofing on the bottoms and sides of the trench drain. And they say, refer to the ramp detail for reinforcing.

Refer to image eight on page S401 for additional information. This is located here. So again, we have three-quarters of an inch detail, three-quarters of an inch detail.

These details are drawn to scale. Detail at ramp slab, again, drawn to scale. We have the conditions happening here.

Refer to the architecture for trench drain information. Distance from the edge of footing to the edge of the trench drain. Here is the expansion joint.

Refer to details eight and nine on this page for additional information. Once again, clear information is presented.

Most of the details, at least those below, are drawn to scale. The remaining details are not drawn to scale.

Please enjoy this drawing once again, and I'll see you in the next video.

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Al Whitley

AutoCAD and Blueprint Reading Instructor

Al was the Founder and CEO of VDCI | cadteacher for over 20 years. Al passed away in August of 2020. Al’s vision was for the advancement and employment of aspiring young professionals in the Architecture, Engineering and Construction (AEC) industries.

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