Eruvin Chart #1
Eruvin Daf 2a, (copied from Shabbos Chart #2)
THE FOUR DOMAINS OF SHABBOS
THE HEIGHT OR DEPTH
CARRYING FOUR AMOS WITHIN THE AREA
|2||RESHUS HA'YACHID||10 Tefachim||4X4 Tefachim (1)||Permitted|
|(A) A POLE IN RESHUS HA'RABIM||Under 10 Tef.||4X4 Tefachim||Patur, but prohibited|
|(B) VALLEY (2)||Under 10 Tef.||---||Patur, but prohibited|
|(A) A POLE IN RESHUS HA'RABIM||Anything other than exactly 9 Tefachim (3)||Less than 4X4 Tefachim||Permitted|
|(B) 10 TEF. ABOVE RESHUS HA'RABIM||Higher than 10 Tefachim from the ground of Reshus ha'Rabim||---||Permitted|
(1) Even 100 X 3.9 Tefachim is considered a Mekom Petur (RAMBAM, Hilchos Shabbos 14:7).
(2) This applies also to all areas of public thoroughfare that are not 16 Amos wide, or to areas of a public thoroughfare that are had to access (such as a "Keren Zavis"). There is also another type of Karmelis which is really a Reshus ha'Yachid, mid'Oraisa, but the Rabanan decreed that carrying four Amos in it is forbidden, as well as carrying from it to another Reshus ha'Yachid. This is a Karpaf (an open valley) that was fenced-in but not for the sake of residential occupation, and a Mavoy in which no Eruv was made.
(3) See Shabbos Chart #1, footnote #7.