To Build a Tower: Part 2a - Rebar Cage for Foundation

A 29' x 7' cage made of hand tied rebar forms the internal support for the foundation which required 44 yards of concrete. These dimensions were determined as part of the soils test performed in Part 1 video. After the foundation hole was drilled (Part 2), the rebar cage was tied, gently picked up with a crane & slowly placed down into the hole. The collar forms the finished concrete rim that will be at ground level & will hold the bolt "pack" consisting of 10 - 2-1/4" bolts that are about 6' long & bolted to 2 precision drilled spacing collars.

The rebar cage weighed 3900lbs & the bolt pack weighed in at a mere 1900lbs. The bolt pack has no physical connection to the rebar cage, other than the hardened concrete that bonds these together as a foundation structure. 2 cross bars of 2" x 2" square steel suspend the bolt pack prior to the concrete pour (the same day). The top end components are bolted together in place to prevent shifting during the pour.

This tower site was designed for Mid-Atlantic Broadband Cooperative (mbc-va.com), by RAF Wireless LLC (rafwireless.com). The tower is located in Appomattox VA & will support Last Mile fiber connectivity for Digital Bridge's WiMAX deployment around Appomattox, called BridgeMAXX. See the next in a series about building a tower site.

Category:

Howto & Style

Tags:

• radio
• tower
• bridgemaxx
• wimax
• appomattox
• digital
• bridge
• wireless
• monopole
• last
• mile
• fiber
• optic
• microwave