| 摘要 |
<p>A refractory roof comprises refractory bricks (A, B, C) arranged in parallel rows (4-6) and having side surfaces connecting with each other, and a superjacent supporting structure for directly supporting some of the bricks, which in turn support the remaining bricks. Each brick (A, B, C) is quadrilateral in planes which are essentially parallel with the roof. Each of the four sides of every brick, which faces another brick in the roof, has two essentially parallel surfaces (A11, A12; A21, A22; A31, A32; A41, A42; B11, B12; ...; B41, B42; C11, C12; ...; C41, C42) which are inclined to a plane essentially parallel with the roof and are joined by a surface which is essentially parallel with the roof. Each of the bricks (A) directly supported by the supporting structure has at least two opposite sides having surfaces (for instance A11, A31; A12, A32) which are inclined downwards and away from each other. Each of the remaining bricks (B, C) has at least two opposite sides having surfaces (for instance B11, B31; B12, B32; C21, C41; C22, C42) which are upwardly inclined away from each other. <IMAGE></p> |
