British Gypsum FireCase steel encasement
27 system references
Technical Library › British Gypsum › FireCase steel encasement
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Board encasement to give structural steelwork its required fire resistance. Use the filter to narrow by performance or board.
| Reference | Build-up | Fire protection (mins) | Max section factor (m-1) | Framed / frameless |
|---|---|---|---|---|
| D120001 (A) | One layer of Glasroc F FireCase 15mm providing 30 minutes fire protection to steel columns up to a Section Factor A/V (HP/A) m-1 (max) of 260 at a critical temperature of 550oC. | 30 | 260 | Frameless |
| D120001 (B) | One layer of Glasroc F FireCase 15mm providing 30 minutes fire protection to steel beams up to a Section Factor A/V (HP/A) m-1 (max) of 260 at a critical temperature of 550oC. | 30 | 260 | Frameless |
| D120001 (C) | One layer of Glasroc F FireCase 15mm providing 60 minutes fire protection to steel columns up to a Section Factor A/V (HP/A) m-1 (max) of 232 at a critical temperature of 550oC. | 60 | 232 | Frameless |
| D120001 (D) | One layer of Glasroc F FireCase 15mm providing 60 minutes fire protection to steel beams up to a Section Factor A/V (HP/A) m-1 (max) of 129 at a critical temperature of 550oC. | 60 | 129 | Frameless |
| D120001 (E) | One layer of Glasroc F FireCase 15mm providing 90 minutes fire protection to steel columns up to a Section Factor A/V (HP/A) m-1 (max) of 98 at a critical temperature of 550oC. | 90 | 98 | Frameless |
| D120001 (F) | One layer of Glasroc F FireCase 15mm providing 90 minutes fire protection to steel beams up to a Section Factor A/V (HP/A) m-1 (max) of 63 at a critical temperature of 550oC. | 90 | 63 | Frameless |
| D120001 (G) | One layer of Glasroc F FireCase 20mm providing 60 minutes fire protection to steel columns up to a Section Factor A/V (HP/A) m-1 (max) of 260 at a critical temperature of 550oC. | 60 | 260 | Frameless |
| D120001 (H) | One layer of Glasroc F FireCase 20mm providing 60 minutes fire protection to steel beams up to a Section Factor A/V (HP/A) m-1 (max) of 251 at a critical temperature of 550oC. | 60 | 251 | Frameless |
| D120001 (I) | One layer of Glasroc F FireCase 20mm providing 90 minutes fire protection to steel columns up to a Section Factor A/V (HP/A) m-1 (max) of 135 at a critical temperature of 550oC. | 90 | 135 | Frameless |
| D120001 (J) | One layer of Glasroc F FireCase 20mm providing 90 minutes fire protection to steel beams up to a Section Factor A/V (HP/A) m-1 (max) of 90 at a critical temperature of 550oC. | 90 | 90 | Frameless |
| D120001 (K) | One layer of Glasroc F FireCase 20mm providing 120 minutes fire protection to steel columns up to a Section Factor A/V (HP/A) m-1 (max) of 68 at a critical temperature of 550oC. | 120 | 68 | Frameless |
| D120001 (L) | One layer of Glasroc F FireCase 25mm providing 90 minutes fire protection to steel columns up to a Section Factor A/V (HP/A) m-1 (max) of 260 at a critical temperature of 550oC. | 90 | 260 | Frameless |
| D120001 (M) | One layer of Glasroc F FireCase 25mm providing 60 minutes fire protection to steel beams up to a Section Factor A/V (HP/A) m-1 (max) of 260 at a critical temperature of 550oC. | 60 | 260 | Frameless |
| D120001 (N) | One layer of Glasroc F FireCase 25mm providing 90 minutes fire protection to steel beams up to a Section Factor A/V (HP/A) m-1 (max) of 144 at a critical temperature of 550oC. | 90 | 144 | Frameless |
| D120001 (O) | One layer of Glasroc F FireCase 25mm providing 120 minutes fire protection to steel columns up to a Section Factor A/V (HP/A) m-1 (max) of 106 at a critical temperature of 550oC. | 120 | 106 | Frameless |
| D120001 (P) | Inner layer of Glasroc F FireCase 15mm and outer layer of Glasroc F FireCase 20mm providing 90 minutes fire protection to steel beams up to a Section Factor A/V (HP/A) m-1 (max) of 260 at a critical temperature of 550oC. | 90 | 260 | Frameless |
| D120001 (R) | One layer of Glasroc F FireCase 30mm providing 90 minutes fire protection to steel beams up to a Section Factor A/V (HP/A) m-1 (max) 176 at a critical temperature of 550oC. | 90 | 176 | Frameless |
| D120001 (S) | One layer of Glasroc F FireCase 30mm providing 120 minutes fire protection to steel columns up to a Section Factor A/V (HP/A) m-1 (max) of 260 at a critical temperature of 550oC. | 120 | 260 | Frameless |
| D120001 (T) | Inner layer of Glasroc F FireCase 15mm and outer layer of Glasroc F FireCase 20mm providing 120 minutes fire protection to steel beams up to a Section Factor A/V (HP/A) m-1 (max) of 69 at a critical temperature of 550oC. | 120 | 69 | Frameless |
| D120001 (U) | One layer of Glasroc F FireCase 15mm providing 120 minutes fire protection to steel columns up to a Section Factor A/V (HP/A) m-1 (max) of 62 at a critical temperature of 550oC. | 120 | 62 | Frameless |
| D120004 (A) | One layer of Glasroc F FireCase 20mm providing 30 minutes fire protection to castellated steel beams up to a Section Factor A/V (HP/A) m-1 (max) of 264 at a critical temperature of 450oC. Claims compliant with Yellow Book 5th Edition 20% rule (YB4.2) assessment method. | 30 | 264 | Frameless |
| D120004 (B) | One layer of Glasroc F FireCase 20mm providing 60 minutes fire protection to castellated steel beams up to a Section Factor A/V (HP/A) m-1 (max) of 104 at a critical temperature of 450oC. Claims compliant with Yellow Book 5th Edition 20% rule (YB4.2) assessment method. | 60 | 104 | Frameless |
| D120004 (C) | One layer of Glasroc F FireCase 25mm providing 60 minutes fire protection to castellated steel beams up to a Section Factor A/V (HP/A) m-1 (max) of 148 at a critical temperature of 450oC. Claims compliant with Yellow Book 5th Edition 20% rule (YB4.2) assessment method. | 60 | 148 | Frameless |
| D120004 (D) | One layer of Glasroc F FireCase 30mm providing 60 minutes fire protection to castellated steel beams up to a Section Factor A/V (HP/A) m-1 (max) of 233 at a critical temperature of 450oC. Claims compliant with Yellow Book 5th Edition 20% rule (YB4.2) assessment method. | 60 | 233 | Frameless |
| D120004 (E) | One layer of Glasroc F FireCase 25mm providing 90 minutes fire protection to castellated steel beams up to a Section Factor A/V (HP/A) m-1 (max) of 60 at a critical temperature of 450oC. Claims compliant with Yellow Book 5th Edition 20% rule (YB4.2) assessment method. | 90 | 60 | Frameless |
| D120004 (F) | One layer of Glasroc F FireCase 30mm providing 90 minutes fire protection to castellated steel beams up to a Section Factor A/V (HP/A) m-1 (max) of 105 at a critical temperature of 450oC. Claims compliant with Yellow Book 5th Edition 20% rule (YB4.2) assessment method. | 90 | 105 | Frameless |
| D120011 | Two layers of Glasroc F FireCase 25mm providing 120 minutes fire protection to steel beams up to a Section Factor A/V (HP/A) m-1 (max) of 260 at a critical temperature of 550oC. | 120 | 260 | Frameless |
Source: British Gypsum White Book Specification Selector (EN systems), retrieved 9 October 2026. Figures as published by British Gypsum; each reference links to British Gypsum's own page for the full specification. Selected systems only - not the manufacturer's full range.
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