1. Ryan Thurston | Duncan McLennan

2. How OSEC was developed
Conceived and designed by engineers to provide a fast track, Green and efficient flooring & roofing solution
To utilise in-house design expertise and steel sections for superior structural performance
Market research showed nothing the same
Prototype designs provided proof of concept
Successful completion of trial show houses and a commercial retail unit have proved it in practice

3. What is OSEC? Off Site Engineered Cassette Modules
Designed by Structural Engineers for each application
Modular floor and roof units
Have been used in Residential constructions
Have been used in Commercial constructions
Have been used in Light Industrial constructions

4. How are they made? ‘C’ section galvanised steel joist framework
Welded or Tek screwed
Typical finish for floor units is moisture resistant 22mm thick chipboard
Additional finishes to required specification can be incorporated to the modules within the factory
Sealed and produced to factory controlled conditions and tolerances
Loaded onto lorry in the reverse laying sequence for ease of unloading/installing

5. How are they installed? Delivered to site
Modules are then hoisted using removable lifting eyes into the structure by crane, or other appropriate plant
Positioned by Installation Team
Lined and Levelled
Bolted together for structural integrity to meet loading specification
Inspected, handed over and signed off

6. Green Benefits
Sustainable materials which can be reused/recycled in total – helping embodied carbon reduction for 2019
Modules can be supplied in a range of U values to suit special project requirements
Reduced lorry movements to site when compared to Site or Ready Mixed concrete
In contrast to ground bearing concrete slabs – No material wastage; less removal of spoil; No A142 mesh; No wash-out debris; No insulation < 5C; No sand/cement screed etc.

7. Green Benefits contd.
Compared to traditional Upper Floor construction:
Achieves Element ‘A’ rating for Upper Floors in Green Book Specification
Shallower floor build-ups without compromising structural performance, providing design flexibility
Longer spans, potentially removing need for load bearing internal walls and foundations
Galvanised finish provides superior protection over timber joists for longevity

8. Key Benefits
Cost effective against traditional floor construction through efficiency savings (reduced build time) and preliminary savings for site/overheads
Improved Health & Safety due to reduced site activity
Bespoke design floor cassettes built to contract requirements

9. Key Benefits No additional precautions required in hot weather
Instant working platform, allowing follow-on trades to continue as soon as the floor installation is complete
Manufactured to factory tolerances in quality controlled conditions (sheltered from the elements)
No delays through rain, or temperatures below 5C
No insulating covers required during cold weather

10. Technical Compliance
Excellent air tightness can be achieved where the modules abut different wall construction methods, by adopting appropriate construction detail
For upper floors within dwellings, OSEC modules meet the Class C classification for 40dB when specified to meet clause 5.23 of Approved Document E
BCSA to support carbon comparison assessment against traditional construction methods

11. End of Slides