Page 40 - Unistrut Cable Management & Metal Framing
P. 40

 INTRODUCTION
Unistrut channels and fittings offer total flexibility in design and construction of assemblies for framing applications.
Unistrut products are available in a range of materials and finishes. These finishes offer differing degrees of corrosion protection for use in a variety of environments. Where required, factory decorative finishes, <i.e., powder coating>, are available to order.
MATERIALS
Channels are cold rolled from 1.5mm and 2.5mm steel strip and are available in:
Zinc Electroplated
Channel nuts and bolts are zinc electroplated.
RANGE
Channels are available in plain or continuous slotted (Code T), in multiple channel combinations and all 2.5mm channels have serrated lips. Slots, 14mm wide x 28mm long or 11mm wide x 25mm long, are provided at 50mm nominal centres. Combination channels manufactured from Pre-Galvanized Steel are spot welded, whilst Hot-Dip Galvanised channels are continuously seam welded or spot welded as appropriate.
LENGTH
Standard channel lengths are 3m or 6m. Cut channel lengths can be supplied.
WEIGHTS & DIMENSIONS
Weights published in this catalogue for all materials are approximate shipping weights. All dimensions are subject to commercial tolerance variations.
TORQUE
The torque figures stated in this catalogue are based on using a properly calibrated torque wrench with a clean, dry (non-lubricated) Unistrut fitting, bolt and nut. A lubricated bolt or nut can cause extremely high tension in the connection and may lead to bolt failure. It must be noted that the accuracy of commercial torque wrenches varies widely and it is the responsibility of the installer to ensure that proper bolt torque has been achieved.
PERFORMANCE
It should not be assumed that the performance of a stainless steel product is similar to that of its mild steel counterpart. Consult your local service centre for further information.
FITTING APPLICATION
All part drawings illustrate only one application of each fitting. In most cases, many other applications are possible. Load values are based on use of a PNP12 Unistrut nut and M12 bolt unless specified otherwise.
While effort has been made to ensure the accuracy of the information contained in this catalogue at the time of publication, we cannot accept responsibility for inaccuracies resulting from undetected errors or omissions.
E & O.E. Unistrut Limited has a policy of continuous product development and reserve the right to change specifications without prior notice.
STANDARDS
The standard requires that products are stamped with BSEN6946:1988 and also the name of the manufacturer.
We at Unistrut® show that the standard is achieved by rolling the channel with the part number along with the full name of the Standard BSEN6946:1988, and also our own UNISTRUT® branding.
This is, as it should be, stamped into the Channel to ensure that you can clearly identify our product over the inferior product that is creeping into the market place.
The engraving should also be clearly visible at all times, even when the product has under gone further finishing treatments i.e. Hot Dip Galvanised, Epoxy Coating.
Contractors and distributors should be aware of cheap imported and non-standard products that have removable or no product marking at all, as this is not within the Standard.
   PO PG HG SS ZP
PLAIN OILED
PRE - GALVANIZED HOT DIP GALVANIZED
STAINLESS STEEL MARINE GRADE ELECTRO ZINC PLATED
 Mild steel channels are rolled using material formed from BS EN 10025 with guaranteed yield 280N/mm2 and minimum ultimate tensile strength of 370N/mm2.
Stainless steel channels are rolled using material formed from BS EN10088-2 grade 1.4404 (Grade 316L).
Unistrut fittings are pressed from hot rolled, pickled and oiled mild steel plate, or strip steel mainly from grade S315MC OR grade S275 mild steel.
Stainless steel fittings are available to EN10088-2 grade1.4404 (Grade 316L).
FINISHES
Hot -Dip Galvanized
Channels are Hot-Dip Galvanized in accordance with BS EN ISO1461:2009 and chromate passivated.
The minimum average Zinc Coating is as follows:
Cold Rolled From 1.5mm Steel – 55 microns
2.5mm Steel – 55 microns Fittings spun galvanized – 45 microns
Pre-Galvanized
Pre-Galvanizing is to BS EN 10326 2004 (Coating Z275).
SPECIAL COATINGS AND MATERIAL GRADES ARE AVAILABLE ON REQUEST:
Stainless Steel
• Stainless Steel 1.4301 (304)
• Stainless Steel 1.4404 (316L)
• Cleaned (Pickled & Passivated) Applying a pickling process to stainless steel results in a clean product and it also removes any heat discolouration that has occurred in the welding process.
Deep Galvanized
A deep galvanized coating can be achieved when using steel containing a slightly higher proportion of silicon; for example Corten ‘A’ steel. Silicon bearing steels modify the chemistry of the galvanizing process, resulting in the zinc coating continuing to increase in thickness as long as the steel remains immersed in the zinc. Coatings up to two to three times as thick as the normal standard coating are practical to achieve.
PVC Coating
PVC coating is a thick coating with good anti-corrosion properties. It gives a generally good chemical resistance to most acidic and alkaline materials. It is not suitable for use with most solvent-based contaminants. PVC coating is suitable for application over hot-dip galvanized steel.
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