I - joists drilling

[Stevenfyeager]

On this job, the Wood I - joists have knock out holes every 2 feet. But in the past I have read restrictions on some not allowing using these knock outs except certain distance from walls. You’re experience? Thank you

 

[texie]

You need to consult the data from the manufacturer for allowable hole sizing and placement. Attached is data for Weyerhaeuser that I happen to have to give you an idea.

 

[retirede]

Those “knockouts “ don’t knock out easily or cleanly. They splinter and look like a hack job. At least the ones I’ve seen.
I’ve also never see the installer line them up - you would end up with a zig-zag in your cables.

 

[LarryFine]

Those “knockouts “ don’t knock out easily or cleanly. They splinter and look like a hack job. At least the ones I’ve seen.
I’ve also never see the installer line them up - you would end up with a zig-zag in your cables.

Agree on all counts. A hole saw works better than an auger, too..