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Fermacell 1HT11 Load Bearing Timber Stud Partition

Third party certifications:
  • BBA Agrément Certificate

    Certificate type

  • QA Certificate

    Certificate type

James Hardie Building Products Ltd

Load bearing timber stud insulated partition system with 30 minutes fire resistance.

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+44(0)1213113480 www.jameshardie.co.uk
Description

Load bearing timber stud insulated partition system based on Fermacell Gypsum-Fibreboard linings.

General information
Specification data - Timber wall framing systems
Product Reference

Fermacell 1HT11 Load Bearing Timber Stud Partition

Timber studs

75 x 50 mm

89 x 38 mm

Lining fixings

30 mm Fermacell screws at 250 mm centres

35 mm + Staples at 200 mm centres

Insulation

40 mm

90 mm

89 x 38 mm stud.

Finishing -
Type

Not required

Fermacell Fine Surface Treatment (FST)

Joint treatment

Fermacell Jointstik 1 mm glued joint

Square edged boards.

Fermacell Joint Filler 5–7 mm filled joint

For site cut boards.

Standard product features

Fire resistance:

30 minutes.

Stud centres:

600 mm.

Linings:

One layer 12.5 mm Fermacell each side.

Insulation (minimum density):

  • 40 mm mineral wool: 30 kg/m³.
  • 90 mm mineral wool: 10 kg/m³.

Recycled content:

Best Fermacell gypsum fibreboard contains 100% recycled content. All by-products recyclable.

Other requirements:

Fire stopping around service penetrations. Frame out openings with the same number of layers of board as per above specification. Sockets backed using baffle boxes, intumescent putty pads or suitable rock mineral wool, sufficient to maintain the fire/acoustic performance.

Movement joints are required at maximum 8 linear metre intervals.

Refer to manufacturer's literature. Vapour barrier as required for high humidity areas.

For tiled areas reduce studs to 400 mm centres as required. Tile adhesive to be suitable for gypsum based substrate.

Provide door reinforcement as required to suit door weights and opening size. Ensure no vertical joints at door jambs.

Offset all board joints by minimum 200 mm.

Product Options

Partition performance (based on stud type and insulation density/ thickness):

- 75 x 50 mm stud, 40 mm mineral wool (30 kg/m³ density):

  • Height (maximum): 3.00 m.
  • Thickness (overall): 100 mm.
  • Airborne sound resistance (Rw): 44 dB.
  • Applied load: 2.5 N/mm².

- 89 x 38 mm stud, 90 mm mineral wool (10 kg/m³ density):

  • Height (maximum): 2.60 m.
  • Thickness (overall): 114 mm.
  • Airborne sound resistance (Rw): 47 dB.
  • Applied load: 5.56 kN per stud.
  • 5–7 mm filler joint option is not suitable for use on this size of stud.

Environmental information
Recycled content

Best Fermacell gypsum fibreboard contains 100% recycled content. All by-products recyclable

Literature
Third party certifications
  • 90/2439
  • ETA
  • ECO Institute
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