Pile (architecture)

“ When the surface of a piled fabric is irregular, also when cut and looped pile are used in combination, design is no longer dependent upon colour, for in the former case pile threads are only lifted over wires where required, at other places a flat texture is formed. In the latter case the entire surface of a fabric is covered with pile, but if the figure is cut and the ground looped the pattern will be distinct. ”

“ Its squat body is the home of the keeper, with a single bright eye of light at the top, and its long spindly legs are the iron piles on which the structure rests. Thirty years ago lighthouse builders were much pleased with the ease and apparent durability of the pile light. ”

“ I have seen piles screwed into a kind of clay rock seam, the end of the pile was made like a saw, toothed, in fact, and stiffened from the bottom to the underside of the screw blade with ribs shaped to cut the ground as the pile was turned, and I doubt if they could have been screwed without. They seemed to steady the pile; but care must be taken when there is a projecting end and it is tapered to a less diameter than the pile shaft, as generally is the case, that the axis is true, or the pile will not screw vertically. ”

“ Unless always well buried and at such a depth that neither the moistness nor condition of the earth vary, I scarcely believe in timber pile foundations at all, except in very peculiar cases, and as a kind of aid to the main support or to help to prevent the toe of a wall from being thrust forward, but for cofferdams, jetties, piers, and such structures, of course they are useful. ”

“ In the case that we have supposed, the weight merely drops upon the nail: this is actually the principle of the hammer used in pile-driving machines. A pile is a large piece of timber, pointed and shod with iron at one end: this end is driven down into the ground. Piles are required for various purposes in engineering operations. They are often intended to support the foundations of buildings; they are therefore driven until the resistance with which the ground opposes their further entrance affords a guarantee that they shall be able to bear what is required. ”

“ Piles are driven all round under the walls at varying intervals or under piers where the weights of a building are to be concentrated. In the erection of the Chicago public library four Norway pine piles, each with an average diameter of 13 in., were driven to a depth of 521/2 ft. and loaded with a dead load of 50.7 tons per pile for a period of two weeks, and no settlement taking place 30 tons per pile was adopted as a safe load. ”

“ The frames of the houses are of wood, the under-plates resting on pillars six or eight feet high, which have a sort of capital, but no base, and are wider at top than at bottom. The people appear to have no idea of architecture as a science, though much ingenuity is often shown in working up their materials. The general appearance of their houses is accurately represented in the annexed plate. For the floorings they lay whole bamboos, four or five inches in diameter, close to each other, and fasten them at the ends to the timbers. ”

“ The sheet-metal chimneys stand tall around the roof, unevenly distributed according to some inscrutable logic that could only be understood with the assistance of as-built drawings, blueprints, mechanical and structural engineering diagrams. Surely though, they are optimized to wick hot air out of the giant brick pile's guts and exhaust it. ”

“ Thus the simplest provision is a mere projecting pilaster, carrying the cross ribs, the wall itself taking the place of the lateral ones. This pilaster may be converted into a shaft or a double shaft, or the rib may be amplified by a central semi-roll moulding, and the whole carried by a triple shaft or other combinations, or a corbel substituted for the pilaster or group of shafts. Thus we have vaulting reduced to a principle which, however plain, is at once artistic and constructionally good, and is susceptible of all degrees of ornamentation. ”

“ Great care must be used with the first two or three lengths of any screw pile to ensure the pile taking a correct or true vertical position. Each series of screw piles should be properly braced together to obtain stability under moving loads. ”

“ In many cases of soft ground, more particularly abroad, sand piles have been adopted and have given very good results. The system is carried out by first driving a large wooden pile down through the soft material into the more solid stratum below. ”

“ But if there is not room enough for the construction of a wall, make channels with their vents extending to the open air. Then lay two-foot tiles resting on the margin of the channel on one side, and on the other side construct a foundation of pillars for them, made of eight-inch bricks, on top of each of which the edges of two tiles may be supported, each pillar being not more than a hand's breadth distant from the wall. Then, above, set hooked tiles fastened to the wall from bottom to top, carefully covering the inner sides of them with pitch so that they will reject moisture. ”

“ Here an order of rusticated Doric pilasters, supporting an entablature with channelled consoles in the place of triglyphs, and a cornice surmounted with a balustrade forming a balcony to the story above, divides the basement wall into alternately wide and narrow bays. A round-arched window in each bay has a heavy keystone in the form of a sculptured bust, which forms at the same time a corbel to the entablature. The unequal spacing of the pilasters leads to an awkward irregularity in the spacing of the channelled consoles which do duty as triglyphs in the frieze. ”

“ In some phases of traditional decoration much use has been made of pilasters—the spacing and distribution of which, while conforming to the conditions of the interior, are similar to the usual employment of pilasters in exterior architecture, with the difference that the spaces between them are occupied by panels or other features. ”

“ Bridge Pier Founded on Piles.
The ordinary method of forcing a pile into the ground is by repeated blows of a hammer of moderate weight; better success being obtained by frequent blows of the hammer, lifted to a slight elevation, than results from a greater fall, there being danger also in the latter case of injuring the material of the pile. ”

“ It is seldom that dependence is placed upon the load being transferred from the top to the point of the pile, even though the point may have penetrated to a comparatively solid material. Wood is generally used for piles, and where the ground is permanently saturated there seems to be hardly any known limit to [68] its durability. The substructure of foundations, where it is certain that they will always be in contact with water, can be, and generally is, of wood, and the permanency of such foundations is well established. ”

“ A complete construction of post and lintel, of pilaster and entablature, is supplemented by another construction of flying buttresses which are clearly superfluous and irrelevant, and which, instead of resisting the thrust of an arch, have the appearance of ineffectually “shoring up” a structure which, though complete, is unstable. ”

“ Byzantine structural scheme. The entablature which is carried around the whole interior at the springing of the vaults, has to do duty at once for the small order of the upper stage and for the great angle pilasters, and thus in so far as it is in good proportion for the one it cannot be so for the other. Then the true magnitudes of the piers and the pendentive arches are falsified by the pilasters and simulated archivolts which spring from them. ”

“ If, however, solid ground cannot be found, but the place proves to be nothing but a heap of loose earth to the very bottom, or a marsh, then it must be dug up and cleared out and set with piles made of charred alder or olive wood or oak, and these must be driven down by machinery, very closely together like bridge-piles, and the intervals between them filled in with charcoal, and finally the foundations are to be laid on them in the most solid form of construction. ”

“ The surface of a pier or pilaster may be enriched by any kind of fluting or chasing that does not materially diminish its substance, but to sink panels in such supporting members is to destroy in a measure the expression of homogeneous compactness. The classic details in this building show the same disregard for correct classic forms and proportions that we find in the art of the Renaissance generally. The superimposed pilasters on the angles are of uniform width, though they differ greatly in height, and those of the various openings are of still different proportions and sizes. ”

“ The pilasters of this order are again four in number, and are set in pairs on either side of the circular opening, the width of this opening making it impossible to space them otherwise. We thus have in the clerestory compartment of this façade a forced arrangement of pilasters, which may have led to that alternation of wide and narrow intervals that became very common in the subsequent architecture of the Renaissance. The attic over the ground story, which extends across the entire front and answers to nothing in the interior of the building, is presumably also by Alberti. ”

“ The designer appears to have had not the slightest idea that arches and columns, pilasters and entablatures, have any meaning save as elements of abstract ornamental composition to be played about according to his fancy. The front (Plate V) is an upright rectangle, crowned with an entablature and a low pediment. A broad pilaster is set on each angle, and the space between is filled with a wide and deep recess having a splayed arch reaching to the entablature on splayed jambs. ”

“ The difficulty is really increased in the later work, but is met by more skilful workmanship. Somewhat similar to the case of the aisle round a semicircular apse, is the case of vaulting a circular building with a central pillar. In each, the main surrounding vault, if uncut by others, would assume the form of a portion of an annulus or ring. In the aisle such a ring would be wide in the opening it surrounds, but in the circular building its opening would be reduced to the diameter of the central column or its capital. ”

“ The fast pile cannot be so withdrawn, as one of the warp threads passes in each of the two surface depressions as well as under the centre bend of the W, thus firmly binding it to the cloth. All other conditions being equal, a fast-pile material would be the better and more expensive of the two, and for upholstery or where there is much wear the "fast" pile is essential. Pile-weave materials are shipped on iron frames of about 60 yards, the material being hooked on to the frame by the selvedge so as to prevent the crushing of the pile. ”

“ The Pillars are of various forms—round or octagonal in small and plain churches, and these not unfrequently alternate; in richer work they are usually clustered; but the pillar most characteristic of the style is the one with detached shafts, which are generally of Purbeck marble, frequently very long and slender, and only connected with the central shaft by the capital and base, with or without one or two bands at intervals. ”

“ Larger piles can have air channels built into them much as light wells and courtyards illuminate inner rooms of tall buildings. As the pile is being constructed, vertical heavy wooden fence posts, 4 x 4's, or large-diameter plastic pipes with numerous quarter-inch holes drilled in them are spaced every three or four feet. Once the pile has been formed and begins to heat, the wooden posts are wiggled around and then lifted out, making a slightly conical airway from top to bottom. Perforated plastic vent pipes can be left in the heap. ”

“ By one method a hole is formed in the ground by driving a steel shell or by other special means and this hole is filled with concrete. By the other method the pile is molded in suitable forms and after becoming hard is driven as a wood or steel pile is driven. Piles constructed by the first method may be either plain or reinforced, but piles constructed by the second method are always reinforced to strengthen them for handling and driving. Concrete piers for foundation work are simply piles of enlarged diameter. ”

“ These pilasters are raised on pedestals forming ressauts to a podium, and some of the windows are grouped in pairs, some in double pairs, and some are single. In the taller part the windows are taller, and show considerable differences of design. One group, consisting of a double pair, has flanking pilasters reaching only to the impost, with a stilt-block rising from the capital of each to the crowning entablature, while Corinthian colonnettes, with strongly marked entasis, support the archivolts—both pilasters and shafts being raised on low pedestals. ”

“ The effect of the scheme, [219] as a whole, from the point of view of structure, is curious with its great pilasters of unusual projection, which have the function of supporting nothing but miniature pedestals and finials. In a general view the low attic wall has somewhat the effect of an entablature, though it is behind, and not over, the pilasters; but considered as an entablature its frieze is encumbered with the pediments of the windows which rise against it. ”

“ He who wishes to avoid such a disaster should leave a cavity behind the facings, and on the inside build walls two feet thick, made of red dimension stone or burnt brick or lava in courses, and then bind them to the fronts by means of iron clamps and lead. For thus his work, being no mere heap of material but regularly laid in courses, will be strong enough to last forever [52] without a flaw, because the beds and builds, all settling equally and bonded at the joints, will not let the work bulge out, nor allow the fall of the face walls which have been tightly fastened together. ”