The drawing of the arches, on the elevation, also shows exactly how the thickness of the arches is included within a precise number of earth block courses, from the intrados at the springpoint to the extrados at the keystone. ❋ Unknown (1995)
These spans are dictated by the coursing of the arches: the aim is to achieve high quality masonry with the height of the arch, from the intrados at the spring point to the extrados at the key-stone, contained within the height of two courses of earth blocks. ❋ Unknown (1995)
Infilling the extrados of the vaulting using stabilized cement mortar should also be carried out in such a way as to ensure a correct balance of the post-compression which will finally stabilize the vaulting. ❋ Unknown (1995)
By reference to Plate XII it will be seen that the water-proofing, which in the concrete-roof tunnels extended the full height of the sides to the 15° line, was carried in the brick-roof tunnels completely around the extrados of the arch. ❋ James H. Brace (N/A)
A small ditch lined with loose 6-in. vitrified half pipe was provided in the top of the sand-wall to collect the water from the extrados of the arch and lead it to the top of the drains. ❋ James H. Brace (N/A)
The reinforcement consists of arch and transverse bars; the arch bars are spaced 6 ins. on centers 2½ ins. from both extrados and intrados, and the transverse bars are spaced 24 ins. on centers inside both lines of arch bars. ❋ Halbert Powers Gillette (N/A)
The concrete arch was placed in sections, from 25 to 50 ft. in length, with a rather wet mixture and a back form on the steep slope of the extrados. ❋ James H. Brace (N/A)
The stability of such structures depends on the position of the line of pressure relatively to the intrados and extrados of the arch ring. ❋ Various (N/A)
The four sides of the mold formed the extrados, the intrados, and the two ends of the block; the other two sides being left open. ❋ Halbert Powers Gillette (N/A)
The stability of such structures depends on the position of the line of pressure in relation to the extrados and intrados of the arch ring. ❋ Various (N/A)
The concrete was then carried up to the springing lines, the arch centers in two pieces were placed; the arch bar of the reinforcement was placed and the extrados forms erected up to the 45° lines, all as shown by Fig. 259. ❋ Halbert Powers Gillette (N/A)
In laying the brick in the arch, the five courses of the ring were carried up as high as the void between the extrados and the rock would permit and still leave a working space in which to place the water-proofing. ❋ James H. Brace (N/A)
The under, or concave, side of the voussoir is called the intrados or soffit, and the upper, or convex, side, the extrados of the arch. ❋ 1840-1916 (1913)
In a flat arch the voussoirs are wedge-shaped, but the extrados and intrados are composed of straight lines. ❋ 1840-1916 (1913)
The rise of an arch is the height of the highest point of its intrados above the line of the impost; this point is sometimes called the underside of the crown, the highest point of the extrados being the crown. ❋ 1840-1916 (1913)
"Are you still wondering what the extrados of a voussoir is?" ❋ Louis Tracy (1895)
The form of the mound may be described as reproducing the extrados of a depressed arch. ❋ Georges Perrot (1873)
The openings left at the summits of the other courses must have been filled in in some way, and, in fact, the line of voids which ran along the top of the extrados was filled in with brick earth, beaten tight and forming the best of keys. ❋ Georges Perrot (1873)
The pavement of the terrace, which consists of a double bed of large bricks, rests upon the extrados of the upper channel. ❋ Georges Perrot (1873)
a dozen State cattle-shows, The style is Gothic, the three transepts looking like those of as many cathedrals stripped of the roof, the extrados taking its place. ❋ Various (N/A)
