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Concrete: a simply supported beam
A 16 by 26 in. beam: why you read every row and not only the status bar, and what a stirrup spacing past its limit does.
Transcript
Concrete: a simply supported beam.
Start
Concrete types are under the Concrete tab of the wizard. Pick the concrete beam.
The inputs
This beam is 16 inches wide and 26 inches deep, spanning 26 feet. The concrete is 4,000 pounds per square inch, with Grade 60 bars: four number 9 at the bottom, and number 3 stirrups at 10 inches. The dead load is 1.2 and the live load 1.0 kips per foot, plus its self-weight.
The results
The status bar reads Adequate, with long-term deflection governing at 0.773.
Read the rows
The moment needs 300.8 kip-feet, and has 389.2. That is also 0.773. Read the rows, not only the status bar: the highest ratio in the table is a detailing row, the stirrup spacing, at 0.849.
A wider stirrup spacing
Change the spacing to 12 inches, and the status turns to Not adequate. Twelve inches is past the limit of 11.78, even though the shear strength still passes. That is what the separate rows are for.
Where the numbers come from
This type is checked against StructurePoint examples written to ACI 318-14, with deviations recorded where ACI 318-19 differs.
Report and sheet
Then print the report, with every check, its equations and its clauses. Print the drawing sheet on your own title block, at the size you choose. Or export the same sheet as a DXF for your CAD software.
Questions? Select Support in the app, or write to us at services@ilxstudio.com.