GB2184757A - Sheet-clad structures - Google Patents

Abstract

Fixing clips 1 for the concealed fixing if castellated or corrugated sheet material to underlying structural members have at least two projections 2a which engage with centre ribs of the cover sheet 3 and an end feature 1a which locates and secures a male rib of an adjacent sheet 4. <IMAGE>

Description

SPECIFICATION Improvements in or relating to sheet-clad structures The invention relates to the cladding of structures having an underlying structural framework and cover sheets normally of corrugated or castellated form, supported on this framework.

It is known to fix such sheets to the framework by fastening means e.g. bolts or rivets which pass through the coversheets.

It is also known to fix mounting clips to the underlying structural members and to fasten the ends of these clips so that they co-operate to lock with features such as shoulders on the castellations or ribs of the high strength cover sheets.

However, previously-used clips have usually had identical end features which are arranged to fit into hollows or recesses in the sheet material. This system has certain disadvantages, particu lary- (a) Limited to two pitches between ribs (b) Limited cover width (approx. 500 mm) (c) Differing side lap detail We have now devised a sheet-clad building system in which the cladding sheets are not perforated during fixing ofthe sheets to the underlying purlins or sheeting rails and which can accommodate a greater width of cover sheet than has hitherto been the case.

This invention consists in a sheet-cladding system fora building wherein corrugated orcastellated sheet material, having male and female edge ribs, is attached to underlying structural members, by means of clips mounted on said members which co-operate with features on interior surfaces of the cover sheets, characterised in thattheclips have at least two projections which engage internally with centre ribs of the cover sheet, and an end feature which locates and secures the male edge rib of an adjacent sheet.

Preferably, the clip end engaging with the male rib ofthe adjacent sheet has an 'S' shape which supports the male rib of the adjacent sheet and engages with a groove in the centre of the rib.

Preferablytheclipsare attached to the underlying structure with bolts or screws.

Preferably cover sheets have four raised hollow ribs at intervals and the hollows of these ribs form the recesses within which the clip projections are re ceived.

Preferably the cover sheet has additional ridges between those receiving fixing-clip projections.

The invention will be further described by reference to the accompanying figures of drawling in which: Figure 1 shows a section through a cladding construction according to the invention; and Figure 2 shows a detail of the cladding system of Figure 1.

With reference to Figure 1,the fixing clips 1 having end features 1 a and two castellated features 2 with projecting tangs 2a aresecured to the underlying sheeting rails or purlins by means ofthrough fixings (not shown on drawing), so as to provide upwardly projecting castellated features on to which the two centre ribs ofthe cover sheet 3 are clipped by virtue of the resilience ofthe high strength steel cover sheet, shoulders 3a on the cover sheet engaging with tangs 2a of the fixing clip. The end feature 1 a locates and engages with the adjacent sheet 4.

With reference to Figure 2 details of the co operating end features of the fixing clips 1 are shown.

The 'S' shaped section 1 a engages with the male rib of the adjacent sheet 4, feature 1 a locating against the angled face of the male rib with the end 1 c locating in a groove or recess in feature 4a. The shoulder ofthe clip id supports the male rib of adjacent sheet4 precisely, over which coversheet3 is clipped.

In this way the coversheet3 does not require to be drilled or perforated and the cooperating clip end shoulder 1d andthe shoulder on adjacent sheet 4 provides locations overwhich the following cover sheet 3 clips rigidly.

Also, in this way a cover sheet width of3 pitches can be accommodated providing a cover sheet width of 750mm or more.

1. A sheet cladding system for a building wherein corrugated or castellated cover sheets having male and female edge ribs are attached to underlying structural members by means of clips mounted on said members, which co-operate with features on the interiorsurfaces of the cover sheets, characterised in thatthe clips have at least two projections which engage internally with centre ribs ofthe sheet and an end feature which locates and secures the male edge rib of an adjacent cover sheet.

2. Sheet cladding system as claimed in 1 wherein the clip end engaging with the male rib ofthe adjacent sheet has an 'S' shape which supports the male rib of the adjacent sheet and engages with a groove in the centre of this rib.

3. A cladding system as claimed in claims 1 or2 whereinthecoversheets havefourspaced hollow ridges, the interior of which form recesses within which the clip projections are received.

4. A sheet cladding system as claimed in Claim 3 wherein there are additional ridges between those receiving fixing clip projections.

5. Asheetcladding system for a building substan- tally as herein described with reference to Figures 1 and 2 ofthe accompanying drawings.

**WARNING** end of DESC field may overlap start of CLMS **.

Claims (5)

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION Improvements in or relating to sheet-clad structures The invention relates to the cladding of structures having an underlying structural framework and cover sheets normally of corrugated or castellated form, supported on this framework. It is known to fix such sheets to the framework by fastening means e.g. bolts or rivets which pass through the coversheets. It is also known to fix mounting clips to the underlying structural members and to fasten the ends of these clips so that they co-operate to lock with features such as shoulders on the castellations or ribs of the high strength cover sheets. However, previously-used clips have usually had identical end features which are arranged to fit into hollows or recesses in the sheet material. This system has certain disadvantages, particu lary- (a) Limited to two pitches between ribs (b) Limited cover width (approx. 500 mm) (c) Differing side lap detail We have now devised a sheet-clad building system in which the cladding sheets are not perforated during fixing ofthe sheets to the underlying purlins or sheeting rails and which can accommodate a greater width of cover sheet than has hitherto been the case. This invention consists in a sheet-cladding system fora building wherein corrugated orcastellated sheet material, having male and female edge ribs, is attached to underlying structural members, by means of clips mounted on said members which co-operate with features on interior surfaces of the cover sheets, characterised in thattheclips have at least two projections which engage internally with centre ribs of the cover sheet, and an end feature which locates and secures the male edge rib of an adjacent sheet. Preferably, the clip end engaging with the male rib ofthe adjacent sheet has an 'S' shape which supports the male rib of the adjacent sheet and engages with a groove in the centre of the rib. Preferablytheclipsare attached to the underlying structure with bolts or screws. Preferably cover sheets have four raised hollow ribs at intervals and the hollows of these ribs form the recesses within which the clip projections are re ceived. Preferably the cover sheet has additional ridges between those receiving fixing-clip projections. The invention will be further described by reference to the accompanying figures of drawling in which: Figure 1 shows a section through a cladding construction according to the invention; and Figure 2 shows a detail of the cladding system of Figure 1. With reference to Figure 1,the fixing clips 1 having end features 1 a and two castellated features 2 with projecting tangs 2a aresecured to the underlying sheeting rails or purlins by means ofthrough fixings (not shown on drawing), so as to provide upwardly projecting castellated features on to which the two centre ribs ofthe cover sheet 3 are clipped by virtue of the resilience ofthe high strength steel cover sheet, shoulders 3a on the cover sheet engaging with tangs 2a of the fixing clip. The end feature 1 a locates and engages with the adjacent sheet 4. With reference to Figure 2 details of the co operating end features of the fixing clips 1 are shown. The 'S' shaped section 1 a engages with the male rib of the adjacent sheet 4, feature 1 a locating against the angled face of the male rib with the end 1 c locating in a groove or recess in feature 4a. The shoulder ofthe clip id supports the male rib of adjacent sheet4 precisely, over which coversheet3 is clipped. In this way the coversheet3 does not require to be drilled or perforated and the cooperating clip end shoulder 1d andthe shoulder on adjacent sheet 4 provides locations overwhich the following cover sheet 3 clips rigidly. Also, in this way a cover sheet width of3 pitches can be accommodated providing a cover sheet width of 750mm or more. CLAIMS

1. A sheet cladding system for a building wherein corrugated or castellated cover sheets having male and female edge ribs are attached to underlying structural members by means of clips mounted on said members, which co-operate with features on the interiorsurfaces of the cover sheets, characterised in thatthe clips have at least two projections which engage internally with centre ribs ofthe sheet and an end feature which locates and secures the male edge rib of an adjacent cover sheet.

2. Sheet cladding system as claimed in 1 wherein the clip end engaging with the male rib ofthe adjacent sheet has an 'S' shape which supports the male rib of the adjacent sheet and engages with a groove in the centre of this rib.

3. A cladding system as claimed in claims 1 or2 whereinthecoversheets havefourspaced hollow ridges, the interior of which form recesses within which the clip projections are received.

4. A sheet cladding system as claimed in Claim 3 wherein there are additional ridges between those receiving fixing clip projections.

5. Asheetcladding system for a building substan- tally as herein described with reference to Figures 1 and 2 ofthe accompanying drawings.