Fixing

Abstract

A T-shaped fixing is formed of a first strip of plated steel providing a T-head limb and a second strip providing a T-stem limb. The limbs are connected by folding the steel double at one edge of the T-head strip and them folding the steel at right angles at the line joining the two limbs. To one side of the stem limb, the line is provided with a series of punched apertures to which pins are fitted. To the other side of the line, the head limb is provided with apertures for screw or rivet fixing of the fixing. The stem limb can also be provided with apertures. For use in insulating a square section duct, its corners are provided with fixings, with flanges having the pin apertures extending downwards at the lower corners and outwards at the upper corners.

1 . A fixing for fixture of a light weight slab to a structure, the fixing comprising:
 a first, generally planar limb;   a second, generally planar limb, set at an angle to the first limb and joined to it at a line extending in both limbs; and   a pin extending from at least one side of the first limb   for penetrating into and fixture of the slab.   
     
     
         2 . A fixing as claimed in  claim 1 , wherein the angle is at least substantially a right angle. 
     
     
         3 . A fixing as claimed in  claim 1 , wherein the fixing is short in the direction of the line with a single pin only per fixing. 
     
     
         4 . A fixing as claimed in  claim 3 , in combination with a plurality of other such fixings, all being interconnected by an elongate member extending in the general direction of the said lines of the fixings. 
     
     
         5 . A fixing as claimed in claim I, wherein the fixing is long in the direction of the line with a plurality of pins, with the limbs being in strip form extending in the direction of the line. 
     
     
         6 . A fixing as claimed  claim 1 , wherein the or each in extends from one side only of its first limb. 
     
     
         7 . A fixing as claimed in  claim 1  any of  claims 1  to  5 , wherein the or each pin extends through its first limb to project from both sides thereof. 
     
     
         8 . A fixing as claimed in  claim 1 , wherein the or each pin is permanently attached to its first limb. 
     
     
         9 . A fixing as claimed in  claim 1 , wherein the or each pin and first limb are adapted for fitting of the pin(s) to the limb(s) during fixture of the light weight slab. 
     
     
         10 . A fixing as claimed in  claim 1 , including means adapting the second limb for attachment of the fixing to the structure. 
     
     
         11 . A fixing as claimed in  claim 10 , wherein the attachment means is adhesive. 
     
     
         12 . A fixing as claimed in  claim 10 , wherein the attachment means comprises anyone or more of magnetic or self-adhesive pads or strips and drillings for screws or rivets. 
     
     
         13 . A fixing as claimed in any  claim 10 , wherein the attachment means comprises clips attached to the structure. 
     
     
         13 . (canceled) 
     
     
         14 . A fixing as claimed in  claim 1 , wherein the limbs are arranged in L configuration. 
     
     
         15 . A fixing as claimed in  claim 1 , wherein the limbs are arranged in T configuration. 
     
     
         16 . A fixing as claimed in  claim 15 , wherein the first limb(s) having the pin(s) comprise T-head limb(s). 
     
     
         17 . An insulated structure as claimed in  claim 7 , wherein the first limb(s) having pin(s) comprise T-head limb(s) and further having sides arranged to have a rectangular cross-section, the structure including light weight slabs on the sides and fixings , the fixings extending along edges between the adjacent sides in the rectangular structure, the slabs abutting edge to face with the interposition of T-head limbs and with these limbs' pins extending into the respective edges and faces of the slabs. 
     
     
         18 . An insulated structure as claimed in  claim 17 , wherein a top one of the sides has T-head limbs of the fixings extending laterally of the edges of the top side and a top one of the slabs is laid on the top side and the T-head limbs, with pins extending up from the T-head limbs into the under-face of the top slab, whereby the top slab is located and reinforced against damage from loads at its edges. 
     
     
         19 . An insulated structure as claimed in  claim 17 , wherein a bottom one of the sides has T-head limbs of the fixings extending downwards of the edges of the bottom side and a bottom one of the slabs is laid against the bottom side between the T-head limbs, with pins extending laterally from the T-head limbs into the edges of the bottom slab. 
     
     
         20 . An insulated structure as claimed in  claim 18 , wherein lateral ones of the slabs are laid against lateral sides, with their top edges abutting the underside of the T-head limbs of the top ones of the fixings and with their inside faces at their lower edges abutting the outsides of the T-head limbs of the bottom ones of the fixings. 
     
     
         21 . An insulated structure as claimed in  claim 17 , including a capping having a central web and turned down flanges, the insulation being laid over a top one of the light weight slabs. 
     
     
         22 . An insulated structure as claimed in  claim 17 , including a plurality of slabs along the length each side, joints in the slabs being taped. 
     
     
         23 . An insulated structure as claimed in  claim 17 , including a flanged joint in the structure, with flanges turned outwards of the sides, the slabs being grooved to accommodate the flanges and provided with a vent through one, preferably the bottom, one of the grooved slabs 
     
     
         24 . An insulated structure as claimed in  claim 23 , including a non-return valve in the vent, directed for allowing escape of pressure air released at the flanged joint and water permeating within the slabs. 
     
     
         25 . An insulated structure having a wall with a circular cross-section, the structure including a circular cylindrical insulation of light weight slab material and fixings as claimed in  claim 1 , the fixings extending around the structure at ends of the circular insulation, with the fixings' pins extending into the end edges of the insulation.