Of course today with the anally retentive security state the idea of roofing with beers in you would horrify the government clerks.
So few people do actually manual labor anymore that the beer/hard work culture is gone.
Coal, steel mills, construction, laundries, mills, fishing...all powered by beer.
Now everyone is fat lazy, lives in house and work in building that they don't even know one person that built them.
AC not working quite right, oh...a horrible day at work. Veritable Joseph Conrad horror..
http://www.youtube.com/watch?v=LoGYx35ypus
When I was in Spain (just a vacation, alas), the only people who got up early were the manual laborers and all the cafes had breakfast specials of chorizo and cerveza. I was up early too because I don't believe in wasting vacation time on sleep.
Even longer ago, when I lived in Minnesota, I remember a news report of union negotiations in a Wisconsin brewery - the brewery wanted to remove the benefit of beer in the breakroom, offering 12-packs to take home instead. The union found this unacceptable. I don't remember the resolution.
My personal rule is, no edged power tools.