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protection of structural steel tie rods and turnbuckles
The “T-REX 381-120” pre-formed shells are elements made of a double layer of different materials, suitable for the fire protection of steel tie rods. They consist of an inner calcium silicate shell with a thickness of 25 mm and an outer rock mineral wool shell with a thickness of 30 mm, faced with 0,25 mm thick galvanised steel sheet, 1000 mm long. The turnbuckle protection is made with a similar element 600 mm long, called the turnbuckle cover. The turnbuckle cover must overlap only the silicate layer of the shells concerned by at least 50 mm on both sides, according to the critical temperature and the length of the tie rod. The insulation and the galvanised steel sheet facing are supplied separately in order to facilitate installation operations. The galvanised steel sheet shall be fixed with self-drilling screws at 200 mm centres.
| Pre-formed shell | Turnbuckle cover | |
|---|---|---|
| Internal diameter | 35 mm | 90 mm |
| External diameter | 150 mm | 200 mm |
| Thickness | 25+30 mm | 25+30 mm |
| Length | 1200 mm | 600 mm |
| Cladding length | 1000 mm | 600 mm |
| CRITICAL TEMPERATURE (°C) INSIDE THE PRE-FORMED SHELL | |||||
| T-REX 381-120 | 350 | 400 | 450 | 500 | 550 |
|---|---|---|---|---|---|
| Elongation (mm/m) | 4,45 | 5,20 | 5,97 | 6,76 | 7,57 |
| Fire resistance | R 120 | R 120 | R 120 | R 120 | R 120 |
The contents of this page are summarised from the official technical data sheet PDF, which remains the reference document.
| Weight | 3,30 kg/m | 3,34 kg/pc. |
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| Linear thermal expansion | 5,8 x 10-6 m/mk | 5,8 x 10-6 m/mk |
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| Insoluble in water | yes | yes |
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| Odourless | yes | yes |
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| Finish | galvanised steel sheet | galvanised steel sheet |
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