Load Tables
1 MATERIAL SPECIFICATION
1.1 CHANNELS :-
Manufactured from steel complying with BS1449 or BS2989 (pre-zinc coated)
1.2 BRACKETS:-
Manufactured from steel complying with BS970, BS1449 or BS4360 Zinc coated after manufacture to BS729 or BS1706
1.3 FIXINGS :-
Bolts, hexagon nuts, screws and washers manufactured from steel complying with BS3692, BS970, Grade A4 of BS6105 or BS4190 Protective coating complying with BS1706 or BS3382
2 DIMENSIONS AND TOLERANCES
In accordance with BS6946: 1988 "Metal channel cable support systems for electrical installations".
3 CHANNEL NOTATION
METSEC channel references are serialised for easy recognition and use. e.g. channel series MS41425 comprises single channel or combinations of channel within the basic section profile thus :-
4 LOAD TABLES
4.1 Comprehensive load tables are provided for each channel series:-
MS414125 Series
MS414125-C2 Series
MS414115 Series
MS414115-C2 Series
MS412125 Series
MS412125-C2 Series
MS412115 Series
MS412115-C2 Series
MS414125-S
MS414115-S
MS412125-S
MS412115-S
Cantilever type B
Cantilever types A and C
Cantilever types D and E
Cable Ladder Systems
Cable Tray - Light Duty
Cable Tray - Medium Duty
Cable Tray - Heavy Duty
4.2 Basis of Design and Formulation of Load Tables:-
4.2.1. Safe loads calculated in accordance with BS5950: Part 5: 1987 - Code of Practice for design of Cold Formed Sections.
4.2.2. Minimum Yield Stress (Ys) 280 N/mm² (Z28 Material)
4.2.3. Beams assumed simply supported and provided with adequate lateral restraint over the given span.
4.2.4. Beam loads are applied through the shear centre of the section in the direction indicated in the tables.
4.2.5. Alternative beam safe load tables are provided for a uniformly distributed load or load concentrated near the centre of the span.
4.2.6. Beam loads and corresponding deflections are calculated at a stress of 175 N/mm² i.e. using a global safety factor of 1.6 to determine safe working loads from limit state analysis (ultimate stress + 1.6 = 175 N/mm²).
Beam safe load tables tabulated with corresponding deflections may be used in
the rare case where excessive deflection does not impair the strength or efficiency of
the structure or its components or cause damage to the supported work. Alternative safe loads are tabulated with deflections limited to span/200 or span/360 at the discretion of the designer and recommended where deflections are critical. It is easily recognisable from
the tables whether the design of the beam
is governed by deflection or stress on a given span. i.e. the critical load is highlighted in colour. 4.2.7. Column effective lengths shall
be determined by the designer in accordance with 4.2.8. Beam loads are generally applied at the column face via the connection bracket. Therefore column safe load tables are provided allowing for this eccentricity of load from the centroid of the section.
4.3 Alternative combinations:-
For safe loads on alternative combinations not tabulated please refer to Metsec Technical Dept.
4.4. Stainless Steel:- The mechanical properties of stainless steel are significantly different from those of carbon steel and safe load tables must not be used for sections in this material. Please consult Metsec Technical Dept. for advice.
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1.1 CHANNELS :-
Manufactured from steel complying with BS1449 or BS2989 (pre-zinc coated)
1.2 BRACKETS:-
Manufactured from steel complying with BS970, BS1449 or BS4360 Zinc coated after manufacture to BS729 or BS1706
1.3 FIXINGS :-
Bolts, hexagon nuts, screws and washers manufactured from steel complying with BS3692, BS970, Grade A4 of BS6105 or BS4190 Protective coating complying with BS1706 or BS3382
2 DIMENSIONS AND TOLERANCES
In accordance with BS6946: 1988 "Metal channel cable support systems for electrical installations".
3 CHANNEL NOTATION
METSEC channel references are serialised for easy recognition and use. e.g. channel series MS41425 comprises single channel or combinations of channel within the basic section profile thus :-
4 LOAD TABLES
4.1 Comprehensive load tables are provided for each channel series:-
MS414125 Series
MS414125-C2 Series
MS414115 Series
MS414115-C2 Series
MS412125 Series
MS412125-C2 Series
MS412115 Series
MS412115-C2 Series
MS414125-S
MS414115-S
MS412125-S
MS412115-S
Cantilever type B
Cantilever types A and C
Cantilever types D and E
Cable Ladder Systems
Cable Tray - Light Duty
Cable Tray - Medium Duty
Cable Tray - Heavy Duty
4.2 Basis of Design and Formulation of Load Tables:-
4.2.1. Safe loads calculated in accordance with BS5950: Part 5: 1987 - Code of Practice for design of Cold Formed Sections.
4.2.2. Minimum Yield Stress (Ys) 280 N/mm² (Z28 Material)
4.2.3. Beams assumed simply supported and provided with adequate lateral restraint over the given span.
4.2.4. Beam loads are applied through the shear centre of the section in the direction indicated in the tables.
4.2.5. Alternative beam safe load tables are provided for a uniformly distributed load or load concentrated near the centre of the span.
4.2.6. Beam loads and corresponding deflections are calculated at a stress of 175 N/mm² i.e. using a global safety factor of 1.6 to determine safe working loads from limit state analysis (ultimate stress + 1.6 = 175 N/mm²).
Beam safe load tables tabulated with corresponding deflections may be used in the rare case where excessive deflection does not impair the strength or efficiency of
the structure or its components or cause damage to the supported work. Alternative safe loads are tabulated with deflections limited to span/200 or span/360 at the discretion of the designer and recommended where deflections are critical. It is easily recognisable from
the tables whether the design of the beam
is governed by deflection or stress on a given span. i.e. the critical load is highlighted in colour. 4.2.7. Column effective lengths shall
be determined by the designer in accordance with 4.2.8. Beam loads are generally applied at the column face via the connection bracket. Therefore column safe load tables are provided allowing for this eccentricity of load from the centroid of the section.
4.3 Alternative combinations:-
For safe loads on alternative combinations not tabulated please refer to Metsec Technical Dept.
4.4. Stainless Steel:- The mechanical properties of stainless steel are significantly different from those of carbon steel and safe load tables must not be used for sections in this material. Please consult Metsec Technical Dept. for advice.
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Metsec plc. Company Number 1551970 (England) Registered Office: Broadwell Road, Oldbury, West Midlands B69 4HF.