the.com/barn raising

means A community event where neighbors gather to build a barn for one family in a single coordinated push, usually followed by a shared meal and celebration.

from Rooted in the practical demands of early American and Canadian rural life, especially among Amish and Mennonite communities: raising a barn's heavy timber frame required many strong hands working at once, far more than one farming family could muster alone. 'Raising' here keeps its plain old sense of lifting a structure upright — the same word used in 'raising a roof' — and the custom became a byword for cooperative labor long before anyone said 'crowdsourcing.'