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The following problems regarding the bearing design for user-input supports introduced with Version 8 have been corrected.
Bearing Length for KB factor for Wall Supports (v8.11 - Bug 2401)
For the bottom plate of a wall, the bearing length used in bearing factor KB calculations was the width d of the wall stud rather than its thickness b, even though the thickness is reported as the bearing length used. The thickness is now used, as it is the parallel-to-grain dimension specified in O86 Table 5.5.7.6.
As a result, the KB factor for a 3.5” stud was 1.12, and for a 5.5” stud was 1.02, rather than the correct 1.25 for a typical stud thickness of 1.5”.
Note that this applies only when the box for Bearing at support end is unchecked, otherwise KB is 1.0.
Default Lower Bearing Support for Columns (v8.11 - Bug 2384)
For columns, the bearing length of the lower support defaults to =Lb for sill plates, but it shouldn’t, they are assumed to rest on a continuous foundation so it should be > 2 x Lb.
Wall Top Plate Bearing Design (v8.11 - Change 105)
The program now assumes a depth of 1.5" for wall top plates used as supports for joist members, leading to a size factor Kzcp of 1.15 in most cases. Previously no depth was assumed and the size factor was 1.0.
Kzcp for Supporting Member in Output (v8.11 - Change 109)
The program now outputs the Kzcp factor for supporting members in the Bearing and Reactions table, if the Show detailed bearing results setting is active.
Wall Supporting Members for Beams (v8.11 - Change 120)*
The program now allows beams to be supported by walls in beam mode, in order to take into account the compressive resistance of a wall top plate. Wall supports are still not allowed for beams in concept mode; a column usually representing built up wall studs must be embedded in the wall.