May one extend a mat (matzelet) over pre-existing tent-supports (arched slats) on a boat on Shabbat?

ShabbatProhibited Labor

Synopsis

When boat arches form a minimum-measure ohel before Shabbat (one arch is tefach wide, or arches are within 3 tefachim of each other via lavud), one may spread a mat over them on Shabbat as a permitted addition to an existing temporary ohel.

Early Acharonim
Late Acharonim
Lenient
Strict
Lesser cited
Major authority

Discussion

Discussion coming soon.

The Daily Law

One question. Every opinion. Every morning.

A new halakhic question and the full spectrum of rabbinic thought, delivered daily.