|
|
|
|
|
The following refinements have been made regarding the designation of load sharing for different member types, and the application of the system factor KH.
Built-up Lumber Beams
For sawn lumber built-up beams, the choices for repetitive member have been changed to Yes and No, in accordance to O86 clause 5.4.4.3 and the separate column for built-up in Table 5.4.4 for factor KH, rather than Case 1 and Case 2, which is from 5.4.4.1,2 and the other columns in Table 5.4.4.
Note that if load sharing is selected for built-up beams, and you select or the program designs a 1-ply beam, then the KH factor is not applied. If you wish to use the beam in a system, then it must be selected as a non-built-up member.
Built-up SCL Beams
For built-up SCL beams, load sharing input has to be set to Yes and there have to be at least three plies for KH to apply. Previously either of these conditions would suffice. The default for SCL is to not apply load sharing to built-up beams because for many products, field-assembled beams do not qualify for the increase. A note to that effect has been added to the Design notes when the KH factor is applied.
Solid Beams
For all beams (SCL, glulam, and sawn lumber), the program now allows you to specify that they are part of a load sharing system, with the default being No. You select Yes only if you know that the the beams are to be spaced not more than 610 mm apart. If so, the Case 1 KH factor from table 5.4.4 is applied for sawn lumber. (According to 5.4.4.1, Case 1 applies to beam-like members, whereas Case 2 from 5.4.4.2 is intended for joists, studs, and rafters.)
If a beam is designated as load sharing, a design note appears in the output giving the required spacing.
Built-up Joists
The program now allows built-up joists (see Feature 78, above). If load sharing is selected for these, the program applies the Case 1 or Case 2 selection if they are spaced within 610 mm, otherwise it applies the built-up factor from table 5.4.4.
Glulam Joists
For glulam members used as a joist, the program now gives the choices Yes/No rather then Case 1/ Case 2, which do not apply to glulam. The program has always applied the glulam value from 6.4.3 for both cases. Note that glulam joists can only be entered into Sizer by creating a new database file in Database Editor.
Output
The output specification of the load sharing choice for sawn lumber has been made to correspond with the input, either Yes or Case 1 / Case2, as the case may be. For SCL, nothing had been showing up in the output, now it shows Yes.