IBR: TUFDEK IBR
IBR is an abbreviation for Inverted Box Rib, an angular trapezoidal fluted profile sheet with a bold appearance that makes it both attractive and practical. Since IBR was introduced to the South African market in 1958, it has become the most popular sheeting profile used in the construction of commercial and industrial buildings.
The general shape and appearance of the trapezoidal flutes ensure that IBR is totally acceptable for use as roof and wall cladding. The deep and broad flutes of the Tufdek® IBR type sheeting ensure excellent drainage characteristics. Tufdek® IBR is designed to provide advantageous load/span characteristics consistent with economy. Tufdek® IBR is rolled with stiffening ribs in the pan which help to remove oil canning from the broad flute. Tufdek® IBR can be factory cranked, curved and bullnosed to a wide range of radii. For further details contact our Technical Department.
Safintra 0.47mm thick, AZ 150 Zincal® Tufdek® IBR profiled roof sheeting, fixed to intermediate coated steel purlins at 1900mm centres and to ridge and eaves purlins at 1600mm centres, with #12 x 65mm Fixtite™ metal fasteners or Safintra approved hex head self-drilling fasteners at every second crest, at intermediate purlins and at every crest at eave purlins. Side laps to be stitched at 500mm centres between purlins with a #14 x 22mm metal stitching fastener, in accordance with manufacturer’s recommendations.
The sheeting shall be Tufdek® IBR type profile as manufactured by Safintra. The profile shall be roll-formed with 5 trapezoidal ribs at 171mm centres with an effective cover width of 686mm. The rib height shall be 36.5mm and shall be fixed in accordance with the manufacturer’s recommendations.
When ordering Tufdek ensure you advise Safintra as to whether the end use is as roofing or cladding.
When installing Tufdek® IBR as side cladding, it is advisable to orientate sheets in a single direction, as this may have a visual impact when reflected in direct sunlight. The direction of the “dot matrix” branding that appears at regular intervals on the backing coat, can be used as a practical guide on site for roofing crews.
All profiles are rolled with stiffener ribs, unless otherwise specified.
During installation, clean the roof daily by removing all swarf, pop rivets and unused fasteners or any other debris.
All sheets are to be tanked or turned up at the ridge side of the sheet and are to be lipped or turned down at the eave end.
Purlin spacings are dependent on both downward loading and negative suction loading caused by wind. An engineer should be consulted to calculate the load (kN/m²) for your particular application.
LENGTH AND ROOF PITCH
A length variation range of +10mm or -0mm, and a width tolerance of ±5mm is permissible. This applies to straight sheet lengths only.
Note that when using Aluminium material or galvanized steel purlins, the use of an isolation tape or similar to prevent the bridging of the two dissimilar materials is recommended. Should the two metals have direct contact it will ultimately result in the manifestation of bimetallic corrosion, and the service life of the Aluminium will be compromised.
*Refer to the Safintra Technical Department for more information or raise any enquiries in writing to firstname.lastname@example.org
It is recommended that side laps be stitched at 500mm centres. It’s
further recommended that every rib is fixed at the eaves, ridges and
the apex of the roof. Side and end laps are to be sealed (in accordance
with SANS10400-L:2020) using a suitable butyl product or neutral cure
Silicone. Refer to the Fixtite™ fastener webpage for fixing guidelines.
FASTENERS FOR TUFDEK® IBR
FLASHINGS AND SIDE STITCHING
Safintra recommends the use of Fixtite™ or Safintra approved Class 4 fasteners.