SETUP AND STABILITY
This is the minimum distance outriggers must be from the edge of a 4-foot deep trench.
What is 4 feet?
This is the first mechanical action an operator should take the moment a blockage is suspected.
What is put the pump in reverse?
This is the minimum clearance distance required from overhead power lines.
What is 20 feet? (50 ft for 350 KV or greater)
To prevent the hose from "whipping" and hitting a worker, the crew should never be near the point of discharge when doing this.
What is Priming or re-starting the pump?
These are the four "Big 4" PPE items required on every jobsite.
What are Hard Hat, Safety Glasses, High-Vis Vest, and Steel-Toe Boots?
When setting up on soft soil or unconsolidated fill, you must do this with your outrigger pads/dunnage
What is double the surface area (or use larger pads)?
You must never use this substance to attempt to "push" or "blow out" a blockage in the line.
What is compressed air?
This person must be present and in constant communication whenever the boom is operating near power lines or in "blind" spots.
What is a dedicated spotter?
Doing this to the tip hose to stop the flow of concrete will cause a massive pressure build-up and a violent whip.
What is Kinking the hose?
This authority allows any employee, including a new hire, to halt a pour if they see a hazard.
What is Stop Work Authority?
This term refers to the dangerous practice of partially extending outriggers in tight spaces without a manufacturer-approved monitoring system.
What is Short-Rigging?
This specific PPE is mandatory, in addition to safety glasses, whenever you are opening a clamp or performing a clean-out.
What is a face shield?
If you MUST exit a truck that is "hot" (touching a wire), you should never step off. You must jump with both feet together and do this.
What is "Shuffle" or Bunny Hop? (Keep feet together to avoid ground voltage).
This "invisible" danger happens when air gets trapped in the line, causing the concrete to come out in a violent slug.
What is an Air Pocket?
This document must be filled out and signed every morning before the unit leaves the yard.
What is the Pre-Trip Inspection / Daily Log?
This term refers to the "invisible" zone beneath the surface—such as buried utility vaults, septic tanks, or old manholes—that can collapse under outrigger pressure even if the surface looks solid.
Sub-surface Voids (or Underground voids)?
If the pump pressure hits this maximum setting (often 350 bar) and stalls, the operator must verify the gauge reads this number before touching any clamps.
What is Zero?
This is the danger of electricity jumping from the line to your boom even if you don't actually touch the wire.
What is Arcing? (Electricity can jump through the air).
Before the pump is turned on, the operator must ensure this specific safety device is securing the hose to the boom.
What is the Safety Cable (or sling)?
Before performing any maintenance inside the hopper or near the S-Valve, the operator must engage this safety protocol to ensure the pump cannot stroke accidentally.
What is Lockout/Tagout (or Engaging the Emergency Stop and killing the engine)?
This is the absolute maximum "lean" (slope) the pump can have before it is considered unsafe to unfold the boom.
What is 3 degrees? (If the truck isn't level, the boom won't behave).
This is the primary reason we reverse the pump 2-3 strokes after a block; it’s not to move concrete, but to do this.
What is to relieve internal line pressure?
If a boom makes contact with a wire, the rig must have this done by certified personnel before it pumps another yard.
What is a Boom Inspection?
After relocating the pump and reversing the sponge back to the hopper, you must do this before switching back to "Forward" to ensure the line is safe and the air is gone.
What is remove the sponge?
This component stores high-pressure hydraulic energy to shift the S-valve instantly; it must be "dumped" or bled before performing any maintenance to prevent an accidental stroke.
What is the Accumulator?