index sitemap advanced
   
view previous page
 
print page
 

Our Most Popular Page Links

 
   
 
   
 
   
 
   
   
   
   
   
   
   
 
 

We offer a wide range of glazing systems which can achieve large spans to suit most designers requirements

The glazing system must always be fixed to OTHERS structural supports which require pitching to the roof slope to acheive weathertightness.

On deep glazing (slope lengths over 3200mm) a structural intermediate purlin (by others) is usually introduced into the design at the mid span position to enable a lighter glazing bar section to be used. Because glass over this length is not available in a single peice as standard, a convenient and common place to join the glass is over the intermediate purlin.

Please note that due to the manufacturing process of our Heritage Lead Clothed Steel glazing bars, we cannot supply them in lengths exceeding 3350mm (11'-0") regardless of whether intermediate supports are provided. If the glazing is required to exceed this length then the design must incorporate a break/tier to overcome this limitation.

Our charts below show indicative spans for all our glazing bar ranges based on the glazing bars being spaced at 600mm centres and should be used for guidance only.

 
Bar Section
Depth mm
Ix-x mm4
Zx-x mm3
Maximum Span Roof Single Glazing (mm)
Maximum Span Roof Double Glazing (mm)
Maximum Span Vertical Single Glazing (mm)
Maximum Span Vertical Double Glazing (mm)
SPG5
70
479,283
12,096
4000
2400
3800
3000
SPG7
95
1,018,848
20,952
5000
3750
4800
3800
SPG10
120
2,015,848
31,251
5700
4500
5500
4400
SPG15
170
5,180,851
56,397
7500
5750
7000
5500
 
Bar Section
Depth mm
Ix-x mm4
Zx-x mm3
Maximum Span Roof Single Glazing (mm)
Maximum Span Roof Double Glazing (mm)
Maximum Span Vertical Single Glazing (mm)
Maximum Span Vertical Double Glazing (mm)
SPG2
70
171,201
3,837
2000
1600
3000
2400
SPG3
90
407,270
7,223
3500
3000
3800
3000
SPG4
115
1,081,585
16,777
5000
4000
4900
3850
 
Bar Section
Depth mm
Ix-x mm4
Zx-x mm3
Maximum Span Roof Single Glazing (mm)
Maximum Span Roof Double Glazing (mm)
Maximum Span Vertical Single Glazing (mm)
Maximum Span Vertical Double Glazing (mm)
BL4
64
169,026
4,435
2250
2000
3050
2400
BL6
76
311,673
7,535
3400
2700
3550
2800
BL7
89
564,759
11,625
4200
3200
4100
3300
 
Bar Section
Depth mm
Ix-x mm4
Zx-x cm3
Maximum Span Roof Single Glazing
Maximum Span Roof Double Glazing
Maximum Span Vertical Single Glazing
Maximum Span Vertical Double Glazing
No. 5
45
96,297
2,376
2700
-
2900
-
No. 7
53
136,847
4,189
3250
2700
3250
3050
Due to the manufacturing process of our Heritage Lead Clothed Steel glazing bars, we cannot supply them in lengths exceeding 3350mm (11'-0") regardless of whether intermediate supports are provided. If the glazing is required over this length then the design must incorporate a break/tier to overcome this limitation.
 
 
Maximum glazing bar spans stated above are based on the glazing bars being spaced at 600mm centres and are for guidance only. We will select the appropriate glazing bar for each contract. Spans are dependent upon the site altitude, distance from the sea, geographical location, height from ground level, pitch of glazing, glazing bar centres, roof shape, wind speeds, snow load, dead load and maintenance load plus additional factors