Conquip Concrete Skip With Bale Arm

Crane-lifted concrete column skip with integrated bale arm for single-point crane attachment. Also known as a Tremie Skip. Five capacities from 500l to 2000l, supplied complete with 3-metre discharge hose.

The Conquip Concrete Skip With Bale Arm, also known as a Tremie Skip, is a versatile concrete pouring skip designed for use in columns, walls, and narrow formwork. The integrated bale arm provides a single-point crane attachment, eliminating the need for a separate four-leg chain sling. Each skip is supplied complete with a 3-metre length of reinforced rubber discharge hose with pull rope for controlled, accurate pours into deep or restricted placements. The range covers five capacities from 500 litres to 2000 litres. A reinforced gate mechanism with strong spring retractor ensures automatic closing when pouring is complete, while the integrated deflector plate prevents concrete splashing personnel or contaminating the ground below. A grout tray collects any excess concrete during flow gate operation, and a safety restraint chain keeps the bale arm secure when the skip is not in use. The skip is designed to lay horizontally on the ground for filling directly from a concrete truck.

Technical Specifications

Dimensions and Weights

Key Features

• Integrated bale arm provides single-point crane attachment with no separate chain sling required
• 3-metre length of reinforced rubber discharge hose with pull rope supplied complete
• Reinforced gate mechanism reduces gate wear and jamming over repeated cycles
• Strong spring retractor ensures automatic closing of the discharge gate when pouring is complete
• Deflector plate prevents concrete splashing personnel or contaminating the ground when the gate opens and closes
• Grout tray collects any excess concrete during flow gate operation
• Safety restraint chain keeps the bale arm secure when not being used
• Heavy-duty box section and thick plate style bale arm for durability and prevention of bending
• Quick-release bale arm design for ease of replacement
• Lifting points designed to take a lifting shackle to reduce friction and wear
• Roll frame prevents bending and concrete filling up in the channels
• Designed to lay horizontally on the ground for direct filling from the concrete truck

Optional Extras

The following optional modifications are available to improve safety and flexibility on site:

• Extended Flow Gate Handle: Removes the operative from underneath the skip when operating the flow gate, keeping personnel out of the danger zone
• Hose Guide: Allows operatives to position the hose during a pour without standing underneath the skip
• Bauer Connection: Quick-release system for switching between different hose lengths without needing to refit hose clips
• Blowout Attachment: Allows clearing of concrete pump lines into the skip after use, minimising concrete waste and improving project sustainability

Suitable Applications

The Concrete Skip With Bale Arm, or Tremie Skip, is the standard concrete-pouring solution on RC frame, structural concrete, and major civils projects. It is widely used for column pours, lift shaft pours, ground beam pours, narrow formwork, and any tall or restricted placement where the conical bottom and controlled gate discharge are needed for accurate pour control. The 500l and 750l sizes suit small infill columns. The 1000l and 1500l sizes cover most standard column and beam pours. The 2000l size suits larger structural elements where minimising crane cycles is a priority.

How to Use

1. Carry out a pre-use inspection: skip body, bale arm pivot points, gate mechanism, discharge hose, lifting attachment
2. Lay the skip horizontally on the ground in the filling position
3. Verify the gate is fully closed and locked before filling
4. Fill the skip directly from a concrete delivery vehicle, ensuring capacity is not exceeded
5. Position the bale arm in the upright lifting position and connect the crane hook
6. Take the strain slowly and verify the skip is balanced before completing the lift
7. At the pour location, position the skip directly above the formwork or feed the discharge hose into the placement
8. Pull the gate lever to discharge concrete into the formwork at a controlled rate
9. Once empty, allow the spring retractor to close the gate and return the skip to ground level for reuse

Warning: Concrete weight must be calculated and confirmed within the skip's safe working capacity. Wet concrete weighs approximately 2400 kg/m3. Never exceed the rated capacity. Inspect before every use under LOLER 1998. The bale arm must be in the upright lifting position and fully engaged with the crane hook before any lift commences. Never stand directly beneath a loaded concrete skip during lifting or pouring.

Safety Information

• Wet concrete weighs approximately 2400 kg/m3 - verify the loaded weight is within the skip's WLL
• Pre-use inspection required before every lift; thorough examination every six months under LOLER 1998
• Bale arm pivot points must be free from damage and operate smoothly before every use
• Discharge gate must be fully closed and locked before filling and during transit
• Spring retractor must be functional to ensure automatic gate closing
• Safety restraint chain must be engaged whenever the skip is not in active use
• Skips with damaged frames, worn bale arm pivots, or compromised gate mechanisms must be removed from service immediately
• Lifting must be carried out by a competent crane operator with a trained banksman or signaller
• Do not stand directly beneath a loaded concrete skip during lifting or pouring
• Use Extended Flow Gate Handle and Hose Guide where available to keep operatives clear of the danger zone

Frequently Asked Questions