A4 Grilles - Roll Up Floor.qxd - Scottaire

GRILLES-Roll-up Floor 

ROLL-UP FLOOR 

GRILLES 

A range of grilles for use in the floor on trench heating or 

ventilation systems where easy access for cleaning and a 

comparatively high free area are required. The grille is made 

in easily handled sections and can be supplied with or 

without a frame. The grilles are designed for light or 

medium, not heavy duty use. 

STANDARD • 

Code 0255. Roll-up floor grille with flangeless frame. 

Removable core 

Code 0256. Roll-up floor grille without frame. Core only. 

Code 0257. Roll-up floor grille with flanged frame. 

Removable core. 

Code 0258. Roll-up floor grille mitre joint for Code 0255. 



STANDARD SPECIFICATION 

SIZES 

12.5mm increments on the nominal length from 

150mm to 2000mm in one piece and 12.5mm 

increments on the nominal width from 150mm to 

400mm. However, any length over 2000mm can be 

made up from sections that butt up to each other 

provided the total nominal length is a multiple of 

12.5mm. 

CONSTRUCTION 

Aluminium blades joined together with stainless steel 

springs and nylon spacers. The frame is aluminium 

with mechanical joints to lock the mitred corners and 

transverse strengthening pieces every 300mm. 

FINISH 

Silver satin anodised to BS 1615 AA5 (5 microns) 

with silver coloured spacers. 

FIXINGS 

Lay in to the opening or trench. No fixing holes 

provided. Fixing type 0F4. See Fixing Methods section 

for details. Please note that if the flanged frame model 

(Code 0257) is used and the underside of the frame is 

not supported, fixing screws must be used in the 

vertical face of the frame so that the flange does not 

take all the weight. The flange on Code 0257 would 

have no fixing holes provided, as standard. 

PACKAGING 

Each length is wrapped in polystyrene sheet and 

packaged in a cardboard carton. 

TECHNICAL INFORMATION 

Free area 60%. (Note:- this should be related to opening at 

the base of the frame or the trench opening size whichever is 

the smaller dimension and not to the face size of the grille) 

OPTIONAL ALTERNATIVES/ADDITIONS 

Non standard sizes. We can manufacture any width 

of grille or frame between 150mm and 400mm. 

The prefix on the product code changes from 0 to 

9. Contact our sales staff at Head Office for details. 

Opposed blade damper. A clip-on opposed blade 

damper in mill finish aluminium (Code 0106) can 

be fitted to the Code 0255 and 0257 models. 

FINISHES 

Black, gold or bronze anodising to AA15 (15 

microns) with similar coloured spacers. Code 0147. 

Please specify the colour. It may be possible to 

provide other anodised finishes for substantial 

quantities. Please contact Llay for details. It is also 

possible to paint the blades and frames any BS, 

RAL, or NCS colour. Code 0145. Please specify the 

colour reference. However, a painted finish is not as 

durable as anodising and this should be borne in 

mind if the grilles are likely to be subjected to much 

foot traffic. 

Note:- It is not possible to paint or anodise the 

spacers and so the choice is limited to silver, white, 

black, bronze/gold, dark brown or light grey to go 

with any alternative anodised or painted finish. 

We suggest powder coating on top of anodising for 

swimming pool applications. 

FIXINGS 

Screw or bolt holes can be punched in the vertical 

face of the frame. Fixings to be provided by others. 

Please specify centres and location required. (Fixing 

type 0F5). The Code 0257 model can have countersunk 

fixing holes in the flange. (Fixing type 0F1). 

See Fixing Methods section for details and centres. 

ORDERING DETAILS 

• The code for the basic grille should have 13 digits. 

See page 1. 

• Please always give length first and then width. 

• Add codes for additions / alternatives as suffixes. 

EXAMPLE: 

A 50 metre run of 200mm wide roll up floor grille 

with a flangeless frame with no fixing holes, finished 

in satin anodised aluminium, with an opposed blade 

damper would be coded:-0255/50000/0200+0106. 

Applications. Supply * Extract * Floor * 

G36


Model shown is Code 0255 + 0106 

Roll-up Floor Grille fitted with Damper 

5 

12.5 

Section Through Core 

Opening Size = D 

Over Frame Size = D - 2mm 

Blade Length = Nominal - 14.5mm 

24.5 

40 

82 

15 

15 

For grille lengths less than and including 2m. 

The frame would be made in one section as below. 

2000mm Max. 

For grille runs greater than 2m but less than 4m, 

grille would be made in 2 equal sections as below 

Equal 

Equal 

For grille runs greater than 4m the length is divided into 

The nearest number of equal sections below 2m long. 

Equal Equal Equal 

Mullions fitted inside 

No end 

border 

fitted when 

part of a 

continuous 

run 

300mm Max Centres 

2m Max Length in 1 Section 

Model shown is Code 0257 + 0106 

Roll-up Floor Grille in a Flanged Frame, fitted with Damper. If this Grille is 

to be used for light floor use the Grille should be secured through 

the side of the frame as shown 

5 

12.5 

Section Through Core 

19.5 

23.5 

Overall = D + 35mm 

4 

20.5 

36 

Recommended fixing method 

Rebate in floor 

78 

For grille lengths less than and including 2m. 

The frame would be made In one section as below. 

2000mm Max. 

For grille runs greater than 2m but less than 4m, 

grille would be made in 2 equal sections as below 

Equal 

Equal 

For grille runs greater than 4m the length Is divided into 

the nearest number of equal sections below 2m long. 

Equal Equal Equal 

15 Max Clearance 

Over Stack = D - 2mm 

Opening Size = D 

Mullions fitted inside 

No end 

border 

fitted when 

part of a 

continuous 

run 

300mm Max Centres 

2m Max Length in 1 Section 

G37


Use Formula 

Roll-Up Floor Grille mitre section in Recessed Frame 

Code 0258 

NOTE: mitre angle to be specified 

Nominal Opening +298mm 

Nominal Opening - 2mm 

300.00 

90° 

300.00 


Nominal Opening 

300.00 

Use Formula 

300.00 



To calculate the outside opening length for any angle other than 90°, use the formula below 

First calculate the angle of the cut = (180 - ) divided by 2 

Then the outside opening length = [ (Nominal opening - 1mm) x tan of the angle of cut ] + 300mm 

e.g. assume nominal dimension = 300mm and = 135° then the angle of cut = (180 - 135) / 2 = 22.5° 

Outside opening length = [ 300 - 1mm) x tan 22.5° ] + 300 = 424mm 

Core Roll-Up Floor Grille mitre section 

Code 0259 




300.00 

X° 

300.00 



Blade Length = Nominal - 2mm 

300.00 

Use Formula 

Use Formula 

300.00 


BladeLength = Nominal-2mm 

NominalOpening 

To calculate the outside opening length for any angle other than 90°, sse the formula below 


Then the outside opening length = [ (Nominal Opening - 1mm) x tan of the angle of cut ] + 300mm 


Outside opening length = [ 300 - 1mm) x tan 22.5° ] + 300 = 424mm 

G38


Roll-Up Floor Grille mitre section in Flanged Frame 

Code 0260 


Nominal Opening+35mm 



300 

90° 

300 




300 

Use Formula 

Use Formula 



300 



To calculate the outside opening length for any angle other than 90°, use the formula below 


Then the outside opening length = [ (300 + 17.5mm) x tan of the angle of cut ] + 300mm 


Outside opening length = [ 300 + 17.5) x tan 22.5° ] + 300 = 431.5mm 

O/A Length must be multiple of 

12.5mm + 5mm 

5 

12.5 

Section through Core 

19.5 

D = Opening Size 

Blade Length = D - 2mm 

10mm Min 

20 

Model shown is Code 0256 

Core only Roll-up Floor Grille 

G39

A4 Grilles - Roll Up Floor.qxd - Scottaire

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