Need to build an elevated concrete deck, but not sure which equipment to choose? Here are 2 different methods for building elevated concrete deck using a concrete boom pump truck.
PROJECT #1: An elevated concrete deck pour for a public school in Tenafly, NJ
The contractor needed to pour an elevated concrete deck for the second floor of the school building.
The equipment: Putzmeister BSF 24 meter concrete boom pump
The above-grade location of the slab required enough vertical reach to get the concrete material to the second floor. The concrete deck pour was located under a roof, so additional pipe and hose was needed to pour the concrete across the entire surface of the deck because much of the deck was beyond the reach of the boom.
To pour the elevated slab, the contractor decided to use a pipeline connected to a boom to reach the second story of the building. The Putzmeister BSF 24 meter concrete boom pump provided 75 feet of vertical reach, and a 4-inch slickline extended the reach further to access the entire floor.
EXPERT APPLICATION TIPS
Start at the back. When pouring an elevated concrete slab using pipeline and hoses, we recommend starting to pour the concrete at the far side of the deck and working your way back to the location of the concrete boom pump truck.
Prime the pipeline correctly. Before you pour the concrete, grout has to travel through the pipeline to prime the line. This is why you start at the furthest point, so the grout can coat the entire length of the hoses needed. In the photo above, you can see the downward pitch of the hose from the boom. With an adequate amount of grout, the grout will completely coat the inside of the hoses.
Use the right hose. For this elevated concrete deck, the contractor chose to use a 4-inch hose that would be lighter and easier to manage than a 5-inch hose, so he needed fewer workers on the deck. Of course, you’ll need to consider your material mix design when deciding which hose will work best. Always use a clean, good quality hose to prevent plugs or ruptures and get your concrete deck pour done fast.
Properly position the boom truck for efficiency. For large jobs, it’s smart to position your concrete boom pump truck so that two concrete trucks can be positioned side-by-side behind the boom truck. Doing so allows for a continuous delivery of concrete, rather than having to waste time moving an empty truck out and pulling in a new full truck. In the photo above, you can see that the outriggers on the sides of the boom truck indicate the amount of space needed for a concrete truck and boom pump. That’s helpful when setting up the boom truck on site before the concrete trucks arrive.
PROJECT #2: Pouring an elevated concrete deck from the inside of a building
In this project, the elevated deck (a mezzanine level) had enough clearance below (30 feet ceiling height) to position the concrete boom pump truck inside the building and alongside of the raised deck.
The equipment: Putzmeister BSF 32Z.16H truck mounted concrete boom pump
For this job, the best choice was a 32-meter Z-boom, which the contractor was able to position alongside of the mezzanine level deck with a 30 foot clearance underneath the roof.
This equipment has a flexible boom that expands up and down and in and out to make it easy to move the concrete around the deck to pour in different spots. This model has the maximum reach (32 meters) along with a low unfolding height so it can fit under a 30 foot ceiling.
How a Z-boom pump can save you money: You will not need to use the extra hoses and pipes that were used in Project # 1. And, you will need fewer workers on the deck since you will not need to manually move hoses and pipes around. The boom places the material exactly where it is needed.
Of course, this method only works when you can get the Z-boom inside the building and operate it under a 30 roof, next to the elevated deck.
Here at Alexander Wagner Company, we have been providing concrete pumping equipment, supplies and service to contractors in the New York metro area for decades. We’re happy to answer your questions and share our expertise. Feel free to reach out to us anytime!