2
votes
1answer
43 views

What is the basis for the ruling that adding to a tent is permissible on Shabbath?

The Gemara in 'Eruving 102a quotes Rav as telling Rav Huna that in order to provide shade for his flock in the daytime on Shabbath yet roll back the cover in the evening for ventilation, all he has to ...
4
votes
2answers
429 views

Is it permissible to use an umbrella on Shabbat?

Assuming one is inside an eruv which generally permits transferring between domains on Shabbat, may one use an umbrella on Shabbat? If not, why not? Follow-up question: What about other things that ...