[Avodah] From the cRc regarding schach

[Moshe Y. Gluck]

R' Dorron Katzin (quoting the CRC):
• The reeds are placed perpendicular to the schach support-beams rather than
parallel to the beams.  
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What difference does it make if the schach is parallel or perpendicular to
the support beams? Is it because of the shittah that a line of "light" all
across the sukkah makes it pasul - if so, then as long as there is anything
dividing it should be ok. Not to mention that lots of sukkahs don't have any
support beams...

KT,
MYG