Powered by the dynamic frame analysis and design engine, spBeam v5.00 is widely used for analysis, design, and investigation of beams, and one-way slab systems (including standard and wide module joist systems) per latest American (ACI 318-14) and Canadian (CSA A23.3-14).

spBeam, formerly pcaBeam and ADOSS, can be used for new designs or investigation of existing structural members subject to flexure, shear, and torsion (equilibrium, or compatibility). With capacity to integrate up to 20 spans and two cantilevers of wide variety of floor system types, spBeam is equipped to provide cost-effective, accurate, and fast solutions to engineering challenges.

spBeam provides top and bottom bar details including development lengths and material quantities, as well as live load patterning & immediate and long–term deflection results. Save in both material and labor using the moment redistribution feature. It allows up to 20% reduction of negative moments over supports reducing reinforcement congestions in these areas.

spBeam also incorporates torsion into shear design and investigation of beam systems. Shear capacity including torsion is represented in terms of required and provided area of transverse and longitudinal reinforcement.

User Interface
Reinforced Concrete Floor Systems
One-way Systems
Beam Systems
nonprestressed beams
continuous rectangular beam
continuous T-beam
One-way Slab Systems
solid nonprestressed one-way slabs
Joist Slab
nonprestressed one-way joist system [pan joist-standard module & skip joist-wide module]
pan joist-standard module
skip joist-wide module
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Analysis & Design of One-way Slabs/Beam Systems
Two-Dimensional Matrix Stiffness Method Analysis of One-way Slab/Beam Systems
spBeam utilizes the stiffness method of analysis via spFrame solver in order to obtain internal forces (moment and shear forces) and deflections of one-way slab/beam systems. Then, the design of these systems are performed per American (ACI 318) and Canadian (CSA A23.3) concrete codes.
Analytical Model for a Typical Story
Live Load Patterning

spBeam program considers the live load pattern configurations in the analysis of floor systems. To cover different loading scenarios which are very time consuming and tedious to do by hand calculation, the program generates live load case based on the following load patterns.

  • Pattern No. 1 (All): All spans loaded with live load
  • Pattern No. 2 (Odd): Starting at span 1, alternate spans loaded with live load
  • Pattern No. 3 (Even): Starting at span 2, alternate spans loaded with live load
  • Pattern No. 3+N (SN): Two spans adjacent to support no. N loaded with live load
Design and Detailing of Reinforcement
The flexural design of floor systems are performed to determine the required top and bottom reinforcing that satisfies not only the flexural demand but also the minimum reinforcement, maximum spacing, crack control, and development length requirements.
Top reinforcement, bar details & bar development lengths
Bottom reinforcement, bar details & bar development lengths
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Results Output
Reinforcement Bars with Development Lengths
Moment and Shear Diagrams
Moment Capacity vs Moment Demand Envelope View
Shear and Torsion Capacity vs Shear and Torsion Demand Envelope View
Deflection View including dead, sustained, live, and total deflections
Loading Diagram
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Advanced Features
Equilibrium-Torsion (ACI & CSA)
Spandrel beam–equilibrium torsion–design of longitudinal reinforcement for moment & transverse & additional longitudinal reinforcement for shear and torsion [ACI Code & Canadian Standard]
Equilibrium-Torsion (CSA)
Spandrel beam – equilibrium torsion – design of longitudinal reinforcement for combined moment-shear-torsion (M-V-T) & transverse reinforcement for shear and torsion – [Canadian Standard only]
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Additional 20% discount available for multi-product bundle purchase spMats, spBeam, spColumn, spSlab, spWall, spFrame (formerly pcaMats, pcaBeam, pcaColumn, pcaSlab, pcaWall, pcaFrame). Email us at for more information on pricing and licensing.