686 - IBR Type - Sheeting

By: Cousins Steel International  11-11-2011
Keywords: Stainless Steel, General Information, Sales Staff

GENERAL INFORMATION

686 "IBR" is an angular trapezoidal fluted profile sheet. Its bold appearance makes it both attractive and practical. Since IBR was introduced to the South African market in 1958, it has become the most popular sheeting used in the construction of commercial and industrial buildings. IBR is an abbreviation for Inverted Box Rib. The number "686" signifies the sheets' effective cover width.
  • The general shape and appearance of the trapezoidal flutes ensure that 686 "IBR" is totally acceptable for use as roof and wall cladding. The deep and broad flutes of the 686 "IBR" Type sheeting ensures excellent drainage characteristics, another characteristic that makes it an ideal sheet for roofing applications.
  • 686 "IBR" offers optimum strength to weight and is designed to provide the most advantageous load/span characteristics consistent with economy.
  • 686 "IBR" offer the end user the option of having strengthening ribs in the sheet which help to remove oil canning from the broad flute.
  • 686 "IBR" can be factory cranked, curved and bullnosed to a wide range of radii (see Bullnosing). For further details contact our Technical Department.

MATERIAL OPTIONS

Galvanised Steel Thickness (mm)
Z250 (Note 1&2) 0,40 0,50
Z275 (Note 2) 0,50 0,60 0,80
Z600
Colour Coated (Note 3)
Aluminium & Stainless Steel (Note 4)
0,60 0,80
0,50 0,60 0,80

Note 1 - 762 corrugated, IBR 686 and Widedek 760 are supplied in a Z200 spelter
Note 2
- Full Hard can be ordered in a Z275 and Z250 spelter. We offer 0,6mm and 0,8mm material in commercial quality, and 0,4mm and 0,6mm in Full Hard.
Note 3
- Available in Mittal's standard chromadek colour coated range. Special colours are available on request. Please contact our sales staff for further details.
Note 4
- We profile certain grades of aluminium and stainless steel. Please contact our sales staff if you require further details.

LENGTHS & ROOF PITCH

686 can be ordered in any length up to 18 metres as per the customers requirements. The maximum length for road transportation is 13,2 metres and lengths over 13,2 metres require special transport arrangements. The minimum roof pitch when using 686 is 5° provided the roof slope is less than 30 metres. For roof slopes over 30 metres a minimum roof pitch of 7,5° is recommended.

TOLERANCES

A length variation range of ±5,0mm, and width tolerances of ±3,0 mm is permissible.

PURLIN SPACINGS

Purlin Spacings are dependant on both downward loading and negative suction loading caused by wind. Your engineer should be consulted to calculate your load (kn/m²) for your particular application. A broad guideline for Purlin Spacings is shown in the table below.
GAUGE MAXIMUM PURLIN MAXIMUM GIRT
   Spacing for Roof Covering Spacing for Vertical Covering
  Double Span Single Span Cantilever Cladding Cantilever
mm metre metre metre metre metre
0,50 (Full Hard)2,001,700,452,801,00
0,602,151,850,453,151,00
0,802,652,300,553,501,15
Double Span refers to a length of sheet being continuously supported over 3 or more purlins.
   MASS / METRE LINEAR METRE / TON
Thickness 0,4 0,5 0,6 0,8 0,4 0,5 0,6 0,8
6862,9763,7174,4645,952336269224168

Sheets 686mm Sheets 686mm Sheets 686mm Sheets 686mm Sheets 686mm
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686
1372
2058
2744
3430
4116
4802
5488
6174
6860
7546
8232
8918
9604
10290
10976
11662
12348
13034
13720
21
22
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24
25
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40
14406
15092
15778
16464
17150
17836
18522
19208
19894
20580
21266
21952
22638
23324
24010
24696
25382
26068
26754
27440
41
42
43
44
45
46
47
48
49
50
51
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53
54
55
56
57
58
59
60
28126
28812
29498
30184
30870
31556
32242
32928
33614
34300
34986
35672
36358
37044
37730
38416
39102
39788
40474
41160
61
62
63
64
65
66
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68
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72
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80
41846
42532
43218
43904
44590
45276
45962
46648
47334
48020
48706
49392
50078
50764
51450
52136
52822
53508
54194
54880
81
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86
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100
55566
56252
56938
57624
58310
58996
59682
60368
61054
61740
62426
63112
63798
64484
65170
65845
66542
67228
67914
68600

Keywords: Galvanised Steel, General Information, Roof Slopes, Sales Staff, Stainless Steel,

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11-11-2011

610 / 762 Corrugated Profile - Sheeting

The fact that the corrugated profiled sheeting has been around since before the turn of the century proves that this easy to use and effective method of roofing and wall cladding is here to stay. Purlin Spacings are dependant on both downward loading and negative suction loading caused by wind. The numbers 8½ and 10½ refer to the number of corrugations across the width of the profiled sheet.