Uni-Level DC1SP Adjustable Supports for Decking & Flooring

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A Levelling Solution for Floors & Decks

Adjustable Decking and Flooring CradleThe Quantum Cradle System is a unique Patented Joist Support with levelling which can be used to provide a mounting system for floors and decking.

The System has been fully assessed and tested by Swansea University Materials Centre of Excellence and conforms to the Loading Conditions for Flooring as laid down in BS5399.

The unique design and buttress thread enables the cradle to carry high loads with infinite adjustment to allow for accurate levelling of the floor or deck surface.

Quantum Rubber Adjustable Decking Cradles

The adjustable decking cradles provide a fast and easy solution for levelling and supporting timber joists for flooring, and decking on balconies and roof terraces. Their unique recycled plastic body is designed to support standard 2" timber joists, keeping them off the roof deck and above the drainage level of the roof.

The cradle is designed with a cellular Rubber Base Support to help spread and soften the impact of the imposed load. The support cradles are simple to install and adjust to allow for the falls and irregularities.

Quantum Rubber Adjustable Floor CradleThe support cradle is also designed for use on uneven and out of level floors. The unique design enables the soft sprung feel of a timber floor to be achieved over concrete sub bases. The support cradle allows for fast installation and removes the need for levelling screeds and the slow drying times normally associated with cementitious type products.

The void created by the support cradles can provide useful space for insulation and can also be used for service runs of electrics, piping, etc.

The system is ideal for use in fast track building programs or conservatory floors.

This product is also useful for levelling garden sheds with 2" or smaller  support beams underneath. An additional advantage is that the shed base is raised above the ground level thus improving ventilation and helping to prevent damp and wood rot.


The Decking and Flooring Support Cradle acts purely as a loading support, so care should be taken when loading the cradle to ensure that the sub base can accept the load. The following is a Table of Load Centres for Standard Joist sizes. The load can be distributed by increasing the number of cradles used.  The most commonly used spacing for the support cradles is at 400mm centres.

Imposed load 1.5kN/m² (31.33 lbs per ft²)
Joist centres (mm)
Imposed load 4.0 kN/m² (83.54 lbs per ft²)
Joist centres (mm)
Joist section (mm)400500600400500600
Width / DepthMaximum clear joist span S, (metres)
44/47 x 972.001.861.751.471.331.22
44/47 x 1222.512.332.201.851.661.51
44/47 x 1473.022.812.642.201.971.80
44/47 x 1703.493.243.052.522.262.07
44/47 x 954.003.713.502.872.572.35
44/47 x 2204.204.183.943.212.882.60
The Cradle is manufactured using a combination of Recycled Plastic and Glass.
Adjustability:15mm – 45mm (Greater Heights can be achieved using base plates, rubber pads or spacers beneath the cradles)
Load Capability:7 kN/m² (146.2 lbs per ft²)