NBS Source
I'm a manufacturer
Compare variants

DuoSpan® Decking Subframe

Verified by manufacturer 4 months ago

DuoSpan 51 mm joist and DuoLift joist supports

Millboard Company Ltd, The Variant:

A subframe that combines the strength of aluminium with the design flexibility of recycled plastic.

Jump to:
BOS
+44 (0)24 7643 9943 Website

Application

Suitable for roof terraces and ground-level terraces, installed onto DuoLift Joist Supports over a solid/ stable base.

Suitable for areas over soft substrates such as patio areas or boardwalks, when installed using DuoSpan beams and posts.

Description

Durable aluminium subframe providing structural integrity and design flexibility, combining the strength of aluminium with the design flexibility of recycled plastic.

DuoSpan® is comprised of aluminium joists, aluminium beams, aluminium brackets and plastic joist inserts that can be used with the DuoLift® joist pedestal system if installed over a solid/ stable base.

The product provides the perfect subframe for Millboard decking, as well as a universal support system for other outdoor flooring. Its design facilitates top-down fixing of decking boards and makes it an easy installation for all levels of competence.


Features and benefits:

  • Complies with Eurocode 1: Actions on Structures (BS EN 1991-1-1).
  • Can be used as subframes for Millboard, WPC, timber, or other types of decking board.
  • Lightweight aluminium profiles are always straight.
  • Plastic Insert allows decking fixings to be put in at almost any angle.
  • Specially designed brackets provide guidance to get two joist profiles aligned and flush.
  • Cathodic barrier coated fixings limits the chance of galvanic corrosion.
  • The blend of Plas-Pro plastic profiles aides curved designs.
  • Lightweight, ease of handling, simple stable fixing, corrosion resistant, slot and screw assembly, flexible connectivity.


Components:

  • DuoSpan 51 x 68 x 3600 mm Joist.
  • DuoSpan 99 x 68 x 3600 mm Joist.
  • DuoSpan 136 x 63 x 3600 mm Beam.
  • DuoSpan Bracket Sets.


Ground preparation:

  • DuoSpan 51 mm Joists: DuoLift Supports over a solid/ stable base.
  • DuoSpan 99 mm Joists: DuoLift Supports over a solid/ stable base, or Plas-Pro posts and DuoSpan beams over a soft base.

General information

Color

Black

Guidance for specification option:

Plas-Pro/ plastic components.

Silver

Guidance for specification option:

Mill - aluminium grey (DuoSpan Joists and Beams).

Finish

Mill

Material

Aluminium

Plastic

Shape

Rectangle

Length

3600 mm

Width

68 mm

Height

51 mm

99 mm

136 mm

Uniclass

Pr_20_76_51_07 Aluminium structural sectionsPrimary

CAWS

Q55/110 Deck

Q55/120 Boardwalk

Specification data - Aluminium structural sections

Material standards

-

Designation system, chemical composition and forms

To BS EN 573-3.

Manufacturer guidance

Structural aluminium mixed with recycled plastic. Aluminium standard EN AW-6063 T66.

Temper designations

T66.

Guidance for specification option:

Aluminium components only.

Structural sections

-

Size

DuoSpan joists: 51 x 68 x 3600 mm.
DuoSpan joist inserts: 25 x 50 x 3000 mm.

Guidance for specification option:

Joists: 4.1 kg each.

Inserts. 3.7 kg each.

Manufacturer guidance

Additional components such as noggins to be added by the installer on site.

Finish

-

Applied

Mill finish.

Guidance for specification option:

Aluminium components only.

Colour

Silver (aluminium components).
Black (plastic components).

Thermal expansion

Joists: 0.0235 mm/m/°C.
Joist inserts: 0.1899 mm/m/°C.

Standard

Extrusion to EN 755-9.

Load

Point load deflection criteria: 1/250.

Span

Guidance for specification option:

Insert requirements.

Maximum unsupported joist span:

  • Domestic applications: 900 mm;
  • Commercial applications: 510 mm.

Manufacturer guidance

Consult manufacturers loading tables for further information as required.

Accessories

Plas-Pro fascia supports.

Guidance for specification option:

  • Recycled plastic (polypropylene and polyethylene).
  • Profile: 100 x 25 x 3000 mm.
  • Weight: 8 kg.
  • Colour/ finish: Black.
  • Thermal expansion: 0.1511 mm/m/°C.
  • Screw pull out: 8.14 kN.

Plas-Pro posts.

Guidance for specification option:

100 x 100 mm, 3 m long as standard; cut to size - insert requirements.

  • Posts to be 1/3 in the ground and 2/3 out of the ground with a minimum of 400 mm in the ground.


Consult manufacturer's literature for further details.

DuoLift acoustic separation pad, 3 mm.

Guidance for specification option:

Agglomerated cork and recycled rubber pads offer a layer of protection between joist supports and membranes, as well as providing an acoustic benefit.

None.

Brackets

DuoSpan brackets and fixings.

Joist supports

Guidance for specification option:

Consult manufacturer's literature and insert requirements and/or drawing reference. Multiple types may be required depending on substrate height variation.

  • Height range: 15–350 mm.
  • Riser diameter: 114 mm.
  • Foot diameter: 220 mm.

Sustainability data

Country of product manufacture

United Kingdom

Material

Aluminium

Plastic

Recyclability

100%

Recycled content

As defined in clause 7.8 of BS EN ISO 14021

40 %

Guidance for specification option:

Partly Recycled.

BIM objects

BOS

NBS BIM Object Standard

This BIM object has been authored to meet the requirements of the NBS BIM Object Standard.

Find out more about the NBS BIM Object Standard.

Platform Compatible Version
IFC
-

1

Revit
-

1

Literature

DuoSpan Loading Tables

DuoSpan Loading Tables

Installation guide for DuoSpan and DuoLift

Installation guide for DuoSpan and DuoLift

Installation Guide for DuoSpan and Plas-Pro posts

Installation Guide for DuoSpan and Plas-Pro posts

Millboard DuoSpan & DuoLift brochure 2020

Millboard DuoSpan & DuoLift brochure 2020

DuoSpan 51mm and DuoLift Tech Spec

DuoSpan 51mm and DuoLift Tech Spec