Mansonry Jet

JOINT EXPANSION TOOL
The innovative, evolutionary masonry
support device

how does the JET work?

The JET works by creating a horizontal pressure across the bricks which diverts the vertical load away from the area that needs to be opened up. This has been independently tested by Ceram Building Technology where it withstood loads of 3.28kn, far exceeding the recommended 2.1kn to prevent collapse.

This means you now an alternative method of supporting gaps up to 2250mm when faced with tight spaces or the need to work above ground floor level. The JET works on buildings up to three stories high.

Why the JET?

The JET was invented and patented by Mr. Andy Lundie, an experienced and respected building contractor who developed this product using years of firsthand knowledge and experience. It’s been designed BY a builder FOR a builder.

The JET is simple & safe to use and can fit in your toolbag!

Simply remove the required mortar as shown in the spacing requirements, insert the JET’s, tighten and start work......easy!

USER GUIDE

Preparation

1.Limitations and interfering factors.

-We recommend that the user thoroughly inspects
the brickwork around the area where JET’s are
being used.

2.Use Protocol.

-Preparation of the area to be supported is
necessary so the JET can provide maximum
support. All cracks, voids and open joints not used
to hold a tool must be closed and properly sealed.

-Under no circumstances should non original parts be used to repair or resemble the JET.

3.Set Up

Implementation

1.Calculate the JET’s required for the job using the spacing guide provided and a visual assessment of the brickwork.

Note: If brickwork is poor or aged use an extra JET on each row.

2. Once the insertion points have been identified drill & clean out required mortar joints. DO NOT use a hammer & bolster chisel to do this as it may weaken the structure.

Note: JET’s should never be placed less than 450mm from the end of a wall, if the required space is less than this move the JET’s across and space accordingly or if not possible use traditional support methods.

3. Insert the JET & open by tightening the central bolt until plates 1&2 are parallel, tighten both nuts on plate 2 by hand until the JET is fixed.

4. Repeat on all required JET’s.

5. Use a spanner to tighten the central bolt until tight, simultaneously expand all of the JET’s in sequence within the same course of bricks check the nuts on plate 2 have tightened.

Note: If the structure begins to move when tightening the JET’s immediately revert to traditional support methods.

JOB DONE!!!!

Additional Information

1. Safe Usage

• The JET works at any height from ground level but requires at least three courses of bricks above the insertions.

2. Imperial Conversions*

• 600mm-900mm = 24” – 36”

• 900mm-1575mm = 36” – 62”

• 1600mm-2250mm = 63” – 89”

*Inclusive of bearings/rests for the lintel or RSJ/H Beam.

3. PPE Required.