You can control the offset between faces. For each cell, the offset can be specified within the SMS_PART node. The value RATIO_Y is the fraction of the web height the cell is offset. The web height is given as the OFFSET_Y for the specific cross section size. The value of the OFFSET_GAP attribute is the absolute offset applied to the cell. In the following example, the top flange face is offset a distance so that there is a gap of 100mm between the top of the web to the top flange.
<SMS_PARTS NAME="Profile">
<SMS_PART KEY="ANGLE_1" MATERIAL_LOOKUP="MATERIAL_CARBON_A" COMPONENT_LOOKUP="ANGLE_1" >
<SMS_CELL NAME="WEB" OUTPUT_UPSIDE_FACE=" webleft ">
<SMS_OFFSET OFFSET_LOOKUP="WEB_OFFSET" RATIO_Y="1.0" OFFSET_GAP="0.100"/>
</SMS_CELL>
<SMS_CELL NAME="TOP_FLANGE" OUTPUT_UPSIDE_FACE="top_flange "/>
</SMS_PART>
</SMS_PARTS>