The child(ren) member(s) are the supported members of your connection assembly. Some connection assemblies support only 1 child member, whereas others support more than 1. The below example is of a HSS-to-W Collared Plate connection with 2 children (supported) members.
Similar to the parent member, when using connection design integrated with SkyCiv S3D, most options will not be directly editable. Instead, the section and material properties will be taken from the member that was chosen in the summary table. To change the values, you will need to change the section and/or material properies back in the Model. The main editable field is the clearance, which is the distance from the face of the child member to the connecting face of the parent member. By default, it will be 0.
Just like the parent member options for the standalone version of Connection Design, you are able to change the cross section by adding one from our Section Database popup. Simply click the button to get started.
When coping is possible, that is when it is between W-to-W sections, in a beam to beam orientation, where the flanges are parallel and the webs are perpendicular, the coping options are available as shown below.
An example render of the coping options above are shown below.