Surface Adjoin Flags
HexDecMotS/JKPurpose
0x11JKRender past adjoin - JED.
0x22JKPassable - JED.
0x44JKDoesn't block sound - JED.
0x88JKAllow player only.
0x1016JKAllow AI only.
0x2032JKAssigned to a surface when its sector's adjoins are disabled via SetSectorAdjoins().
0x4064JK 
0x80128JKNormally given to an adjoin?