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Supported member type
There are there choices for columns - Beam, Non-wood, and Sill plate. There are two possibilities for walls - None and Bottom plate.
The default for columns is Non-wood and for wall studs it is Bottom plate.
Non wood
This is chosen to indicate that the supporting member is made of concrete, steel or some other material not designed by WoodWorks.
Sill Plate
This choice is for a 2-inch thick wooden member which is assumed to lie on the flat, usually affixed to a concrete or block foundation. The program implements a special set of sill plate database materials, using essentially joist database files. The bearing length information is taken from the “d” dimension of the sill plate materials.
Beam
The supported member is assumed to be a beam, so that the material, species, grade, and bearing length information come from our beam database files.
Bottom plate
The supported member is assumed to be a bottom plate of the wall, so that the information comes from the wall database files. It may be different than the wall stud material.
Material, Species, and Grade
These fields operate as described for beams in 1.b)v, except that these fields can be disabled when you check the Same Materials as Wall Stud, described below.
Same Materials as Wall Stud
If this item is checked, then the wall bottom plate uses the same Material, Species and Grade as the main member.
These fields are greyed out in this case. The Material shown is the same as the one for the stud, and the Species and Grade, which can be unknown for the main member, read Same as wall stud.
Bearing length
This is a drop list that does not allow you to enter their own values. For columns, the choices are Column width and Column depth. For walls, there is only one possibility - Stud width.
Bearing Length – Point Load
This field comes into play if there is a point load of any type on the support. It is the width of a column or a beam or beam supported by the main member, and transferring a load to the main member. It is needed to implement CSA O86 5.5.7.3-4. It is measured parallel to the main bearing length Lb.
Greater than 2 Lb
This choice allows you to specify that it creates an area greater than the maximum bearing area given in O86 5.5.7.4. All bearing lengths longer than this will result in the same bearing resistance.
Equal to Lb
This choice models the situation where the point load is exactly the same width as the member supporting the beam, as when there is an identical column below and above the beam.
½ Lb
This choice is included to allow for files from previous versions to have the same design as before, as it was the assumption with previous versions of Sizer that the supported point load was ½ the lengthe checkbox “Bearing at Support End” indicates that the supporting beam, sill plate, or wall bottom plate ends at the column or wall, so that the bearing length factor CB / KB is not applied. of the main member bearing length..
Bearing Width
There is no bearing width input. For columns, it is assumed to be the other of Column width and Column depth than that which is selected for bearing length. For walls, it is assumed to be the wall stud depth.
Bearing at Support End
Refer to the corresponding item for beam supports for more details.