INSTALLATION OF FIRE-TEK BEAM AND COLUMN SLAB USING ADHESIVE NOGGIN FIXINGS SYSTEM

Structural Steel Protection
INSTALLATION OF FIRE-TEK BEAM AND COLUMN SLAB

Adhesive Noggin Fixing System - up to 2 hours fire protection

Noggins are cut 100mm wide from Fire-teK Beam and Column Slab and installed at 500mm centres.

Where board thicknesses are below 40mm. Noggins can be made of two layers to meet the minimum noggin thickness of 40mm. Where board thicknesses are 40mm or greater, the noggin should be made from that board thickness.

Max board thickness for both methods is 65mm. 

They should be cut to a suitable length relative to the web size to give a tight compression fit.

Noggins are glued top and bottom using a typical thixotropic adhesive and friction fitted between the flanges at 500mm centres.

The noggins should be installed in such a way that they are flush with the flange, and such that they coincide with joints between the boards.

It is preferable to leave the noggins in position for 4 hours to allow the adhesive to cure. However, where this is impractical Fire-teK Beam and Column Slab can still be fitted before the adhesive cures since the noggins are essentially friction fitted.

For web depths greater than 500mm, T-shaped or solid noggins should be used, formed from Fire-teK Beam and Column Slab, and screwed together using pig tail screws

Adhesive detail

The adhesive used for gluing Fire-teK Beam and Column Slabs should be a thixotropic adhesive type based on soluble solids of silicate and potassium mixed with clay or refractory mineral filler to an approximate ratio of 70:30 by weight. Steelwork should ideally be dry but the presence of condensation will merely prolong the cure time, not weaken the bond strength.

Note: Steelwork should be clean and free from grease prior to the application of adhesive.

Pig tail screws

Pig tail screws are made from 1.6mm diameter spirally wound galvanised wire.

Board thickness (mm) 20 >35 >45 >65
Min screw length (mm) 40 55 90 110

The screws should be installed flush at 150mm centres on board to board joints and 100mm centres over noggins, using either power or hand tools. There is no need to countersink the screw heads.

 

Column with partition abutment

Column with wall lining abutment