Concrete Drilled Depth Node Installation

Drill 2 pilot holes for the tapcons using a 5/16” masonry bit in the concrete drill set to the impact setting Ref: How do I determine the size of bit needed for my Tapcon® screw?For a 3” long, ⅜” diameter tapcon, the 5/16” diameter pilot hole must be at least 4” deep

node holder slides into telespar attached to cantilever by a winged strut channel connector

measure the distance from the top of the cantilever to the bottom of the sensor cone.

when the node is surveyed we will get the altitude of the top of the cantilever. we need this measurement to connect survey elevations to water surface elevations

assuming a flat surface you can avoid having to hold the node up while the tapcon is being drilled by having most of it rest on the surface

try to avoid drilling and removing tapcons multiple times as this can reduce the pull strength

measure the distance from the top of the cantilever to the water bottom

the bed may be mucky or current may be strong. having a team member in waders in the water body can help if it's safe to do so.

take 6+ pictures showing the node from multiple angles and capturing the node ID sticker

update any applicable fields in AirTable (or other asset management tool)

make sure node ID is visible in at least two pictures