Naylor Lintels
Lintels l-strip steel lintels concrete lintels
Naylor, a manufacturer of building materials since 1890, combines a
wealth of experience in manufacturing techniques and in-depth ranges
with a reputation for quality products, service and value for money.
The Naylor lintel range has been continually improved and enhanced
over the last 30 years in response to ever changing customer
requirements and needs. The result is an unrivalled range offering
lintels to suit every situation, backed up by a speedy and efficient
specials service.
Lintels Product Range
Hi-Spec Range - The Naylor Hi-Spec lintel
is the most widely specified range of prestressed concrete lintels
in the country. The system comprises a range of high performance
prestressed concrete units and stainless and galvanised steel front
trays.
Fair Faced Range - A range of lintels with
the same high performance characteristics as the Hi-Spec range
Fire-Spec Range - Naylor Fire-Spec lintels
are ex-steel mould finish high performance units. They are available
as standard with up to 2 hours fire resistance and as specials with
over 2 hours.
Fair Face Fire-Spec Range - NaylorFair
Faced lintels are also available with a Fair Faced Class 'C'Fair
Faced finish with up to 2 hours fire resistance as standard.
Colour-Spec Range - A range of lintels
colour washed to suit particular site requirements. The wash acts as
a stain, penetrating the concrete surface and equalizing colour
variations. It has a proven long life finish, reduces surface
dusting and increases light reflectivity. Colour-Spec lintels have
the same high performance characteristics as the Hi-Spec range.
Chem-Spec Range - Lintels containing
additives for withstanding aggressive conditions such as for use in
contaminated land. Typical contaminates may include; sulphates,
lead, petrochemicals, etc.
Specials Range - A speedy and efficient
service offering solutions to difficult site situations. Examples of
specials produced include: large and unusual shaped sections,
lintels with inserts cast in and units with chamfers or notches.
Ground Beam Range - An application for
which many of our Hi-Spec lintels are suitable. Lintels may be built
directly off pad foundations regardless of ground conditions, saving
time and money.
Padstone Range - A comprehensive range of
dense concrete Padstones is also available. Non standard sections
and profiles are available upon request.
L-Strip Range - L-Strip is available in
either stainless or galvanised steel and is also available with a
wider flange suitable for stonework outer leaf. It is designed for
use independently in traditional or timber framed construction.
Economy Range - A cost effective range of
lintels for stockists, all fully reversible and available in packs
for ease of handling/ordering. All economy lintels are suitable for
use with L-Strip.
Installation
Concrete Lintels
All Hi-Spec, Fire-Spec and Fair Faced Naylor
lintels are market 'TOP'. This surface should remain uppermost at
all times. It is important that lintels are installed the correct
way up. If the mark 'TOP' cannot readily be seen, the lintels should
be built-in in such a way that the reinforcing strand (visible on
the end faces) is in the bottom of the unit. Naylor Economy Lintels
are fully reversible and may be installed any way up.
Lintels should be carefully bedded on a full
mortar joint.
Wall ties should be positioned in accordance with
current building regulations.
A damp proof course should be used for all
lintels in external walls, and must be fixed in accordance with
building regulations.
In cavity construction, it is recommended that
both internal and external leaves are taken up uniformly. For spans
in excess of 1200mm, it is good practice to provide temporary
support (at 1200mm centres). If lintels are supporting concrete
floor load, a minimum lintel depth of 140mm is recommended to allow
for impact loads during the actual placing of concrete flooring.
L-Strip Steel Lintels
A thin mortar bed should be placed in the reveals
of the external leaf and the L-Strip bedded onto this. For spans in
excess of 1200mm, temporary support (at 1200mm centres) should be
provided until the first few courses of masonry have matured: window
and door frames are normally sufficient for the particular purpose.
Wall ties should be positioned in accordance with current building
regulations.
Stacking
Timber bearers should be located near the ends of
the lintels and placed vertically in line. For those lintels marked
'TOP', it is important that these are stacked the correct way up on
firm ground.
Cutting
Concrete lintels may be cut using a high speed
disc cutter. Use of this should by a properly trained operative
taking due regard of current Health and Safety regulations.
Quality Standards
The design of Naylor prestressed concrete lintels
complies with BS8110 part 1:1997: section 4. Naylor lintels are
manufactured in accordance with BS5977: part 2:1983.
Materials used in the manufacture of Naylor
prestressed lintels comply with BS12 and BS882. The prestressing
strand/wire complies with BS5896.
Naylor lintels have a low water absorption and as a result of the
quality controlled Hi-Spec dense concrete mix used in their
manufacture, they can therefore be used underground provided that
the ends of the lintels have a minimum 45mm cover of mortar to the
ends of the reinforcing strands.
L-Strip lintels are manufactured from steel strip complying with BS
EN 10025 with the minimum yield stress of 175 N/mm2. Zinc coating is
galvanised to BS2989Z2. L-Strip is also produced in austenitic
stainless steel conforming to grade 304:S15:BS1449: part 2.
Lengths
Naylor lintels are available as standard in
lengths from 600mm to 3600mm. Longer and intermediate lengths are
available on request.
Scope of Manufacture
Limitations:
Weight: max 4 tonne
Width: max 2 metre
Load Bearing
Lintels are usually supplied with the following
allowances for bearing at each end:
-
100mm for openings up to/including 1000mm
-
150mm for openings up to/including 3000mm
-
200mm for openings over 3000mm
It is however, the responsibility of the building
designer to ensure that these are sufficient to avoid over-stressing the
masonry at the supports.
Technical Services
A free design and technical service is available and
advice is gladly given for particular requirements and applications.
Lintel schedules and calculations where required, can be provided from
working drawings. Naylor lintels can be specified from the NBS Plus
Clauses F30: 740 and F30: 750.
Request information: Naylor
Lintels lintels l-strip steel lintels concrete lintels
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