spSlab v3.10 - Updated January 2010

Enhancements

1.

Adjusted ACI 318-08 metric factors for concrete shear capacity and minimum shear reinforcement calculations.

2.

Revised minimum shear requirements for special members per ACI 318-08.

3.

Revised normal weight concrete limit in development length calculations per ACI 318-08.

4.

Revised lambda factors for lightweight concrete.

5.

Revised minimum thickness calculations for two-way systems for ACI code.

6.

Improved development length calculations for structural semi-low density concrete for CSA code.

7.

Improved calculations of reinforcement concentration over supports required per CSA code.

8.

Improved calculations of modified gamma_v and gamma_f factors for corner and edge columns for ACI code.

9.

Improved calculations of reinforcement required for flexural transfer of unbalanced moment over supports.

10.

Allowed more economical design of slabs in systems with transverse beams by assuming face of the support at beam edge if beam is wider than column.

11.

Improved calculation of moment distribution factors for systems with longitudinal beams.

12.

Improved calculations of moment distribution factors in models with transverse and longitudinal slab bands in selected spans only.

13.

Improved interpolation of moment distribution factors at span ends over wide (wall) supports in systems where column strip width and middle strip width are not equal.

14.

Revised Manual and Help documentation to increase accessibility, enhance description of new program features and reflect added functionality.

15.

Provided access to software manual directly from the Help menu.

16.

Revised text output for increased clarity and consistency.

Resolved Issues

1.

Exceeding combined M-V-T capacity of bottom bars in certain design cases

2.

Column reaction equal to zero for systems that include lateral loads and moment redistribution

3.

Applying default load combinations when switching design codes and no load cases are defined.

4.

Applying default load combinations when switching design codes and SELF and/or DEAD load cases are not defined

5.

Providing results for combined shear and torsion in investigation mode.