Showing papers on "Deck published in 1976"

Mezzanine structure for wide-bodied passenger aircraft

Abstract: An elevated deck structure is positionable on the main deck floor in the passenger compartment of a wide-bodied aircraft for providing a mezzanine seating area in the substantially unused upper lobe of the fuselage. A sectioned elongated support wall has a lower portion which is detachably secured to a pair of conventional seat tracks extending longitudinally along the center line of the main deck floor. A plurality of mezzanine floor sections are secured to the top of the support wall and project laterally outward toward the sidewall of the aircraft fuselage. The mezzanine floor is elevated a sufficient distance above the main deck floor to provide passenger seating both in the area under the mezzanine floor on either side of the support wall and on the mezzanine floor itself in the upper lobe of the aircraft. The elevated deck structure is more narrow than the passenger compartment is wide at the mezzanine level so as to leave sufficient clearance for visual access by the mezzanine passengers of the main deck area and windows in the fuselage sidewall. In addition, its lateral extension is limited so as to not restrict overhead clearance on the main deck aisles. At least one stairway is provided at an end of the structure for passenger ingress and egress between the main deck and the mezzanine area. Both the support wall sections and the floor sections are sized to be received through a conventional aircraft passenger door so that the extra seating capacity can be added or removed to meet changing requirements.

Vibration criteria for long-span floors

Abstract: Annoyance criteria are derived for walking vibrations of long-span floors. The criteria are developed primarily for steel beam or joist construction with concrete deck, spans greater than about 25 ...

Design Recommendations for Steel Deck Floor Slabs

Abstract: The recommendations are based on the steel deck serving as the structural load-carrying element during the construction phase and the composite steel-deck concrete floor slab serving as the load-carrying element for the service-load phases. The recommendations focus on application of strength principles based upon data obtained from performance tests for the shear-bond and flexural failure modes. The design equations for the shear-bond capacity are derived from data obtained by means of a performance test series. A plot of the parameters, is made and a linear regression is performed to determine the slope and intercept constants needed for design. A separate regression is necessary for each steel deck profile; and, in addition, a separate regression is suggested for each steel gage thickness, steel surface coating, and concrete type. Additional recommendations presented consider construction, shoring, deflections, and span-to-depth ratios. /Author/

A Study of Shipping Water Pressure on Deck by Two-Dimensional Ship Model Tests

Abstract: Shipping water pressures on deck were investigated by forced heaving tests of a two-dimensional ship model. Test results of the shipping water pressures on deck, the relative waterelevations on the ship side, and the profiles of the shipping water on deck are shown anddiscussed. Approximate caluculations of amount of shipping water were carried out.

Roll away decking system

Abstract: A rollaway decking system for use in transport vehicles, e.g., truck trailers or shipping containers, includes a pair of tracks mounted on opposite side walls of the vehicle and a rollaway deck extending between the tracks. The deck has a plurality of articulated panels arranged in and edge to edge relationship with each adjacent pair of panels including an integral, hinge-like linking arrangement extending across the adjacent edges of the panels for pivotally connecting the panels together. Each track includes a support extending underneath the deck for engaging the underside of the deck under heavy load conditions. The deck includes a plurality of deck sections which can be used together or individually to accomodate various loads.

Cargo transportation device

Abstract: A cargo transporting device comprises a flat deck container having at opposite ends upwardly extending partial walls cooperating with hinged bulkheads which in an upright position provide continuous vertical walls at the ends of the platform. The hinged bulkheads are movable to stored positions on the deck of the device wherein the low height walls provide supports for stacking a plurality of the same type of container or device. The deck or platform of the containers are provided with a plurality of twist lock assemblies which are movable from operative positions locking containers on the platform to stored positions below the deck.

Steam and vacuum cleaning apparatus

Abstract: A lightweight mobile and efficient apparatus for cleaning fabrics by the simultaneous application thereto of steam and vacuum comprises a trolley having a lower deck which supports a water tank and a vacuum tank, and a detachable upper deck on which at least one motor, pump and ancillary components thereof are mounted.

Shear-bond analysis of steel-deck-reinforced slabs

Abstract: A brief review of steel-deck-reinforced floor systems and resulting failure modes is presented, followed by the development and evaluation of design equations for one-way shear-bond capacity A linear regression of pertinent strength parameters was utilized to fit potential design equations to experimental data Results of three of several possible equations are given; these are based on parameter grouping from 353 specimens of various types tested at Iowa State University and 151 proprietary tests conducted by steel-deck manufacturers Example regression plots pertaining to slab elements for six different steel deck configurations were developed Effects of shoring and gage thickness are considered The preferred design equation was obtained from a relationship for shear design in the 1971 ACI Building Code

Deck platform extension for boats

Abstract: A removable deck platform is attached to the stern transom of a boat for extending the effective deck space of the boat rearwardly. Hinges are used to removably attach the deck platform to the transom. Triangular support braces attached to the bottom of the deck platform extend downwardly from the platform and rest against the transom when the platform is in place. A railing extends upwardly around the outer periphery of the platform, and the effective useful length of the boat is enhanced by attaching two rearwardly facing swivel chairs to the upper edge of the stern of the boat.

Mobile ship loading and unloading facility

Abstract: A method of establishing a ship loading or unloading pier facility comprises providing a buoyant self-propelled vessel having removable jack-up legs and a well carrying a plurality of buoyant jack-up platforms, propelling the vessel with the legs stored on deck to an off-shore site adjacent a shore line, floating the platforms out of the vessel through an opening in the hull thereof, jacking-up the vessel to render it stationary, and arranging the platforms together with connecting tressels to form a roadway between the vessel and to shore. The vessel carries a crane which is used to remove and install the jack-up legs and to transport cargo between a cargo ship moored to the vessel and the roadway.

Composite Steel-Deck Concrete Floor Systems

Abstract: The use and application of composite steel-deck concrete floor systems in building construction both in the U.S.A. and Canada is presented. A comprehensive literature review on the topic is given. Examples of proprietary composite decks presently on the market are illustrated. Advantages and disadvantages in using composite deck slabs are stated and analyzed. Composite beams and open-web joists incorporating steel-deck-reinforced slabs are also considered in general.

Sea platform construction

Abstract: A sea platform includes a first part which comprises a floatable platform or deck having a plurality of supporting legs which extend therethrough and which may be elevated and lowered by an elevating mechanism. A second part comprises a floatable base which is adaptable to be lowered to the sea bed. A plurality of second legs extend upwardly from the base and they include open tops in an uppermost chamber of a size to receive the lowermost ends of the first legs therein in telescopic interengagement. Both the first and second parts are floatable out to the location to be of use and the base is then flooded in order to submerge it to the sea bed. The other part includes a floatable platform and it includes an elevating mechanism for each of its legs which may be lowered into the tops of the legs extending upwardly from the base after it arrives at the same location as the base. For the purpose of effecting the interengagement of the legs, the upper legs of the floatable platform are provided with a seal lock permitting access to a working chamber having a winch. The winch is connected to a cable which is extended out of the chamber and floats on a buoy on the sea during its movement to the sea location. The bottom legs each include a buoy connection to the interior of the uppermost chamber thereof and the two connections are removed from the buoy and interconnected and wound upon the winch in order to bring the legs carried by the platform downwardly into engagement with the second legs carried by the base and they may be locked together.

Modular roadway for a transportation system

Abstract: There is disclosed an aerial roadway comprised of prefabricated, cantilevered deck modules; and supporting columns, interlockingly mounted on and monolithically attached to prefabricated, prestressed, post-tensioned spinal beams supported on columns; an elevated roadway comprised of prefabricated cantilevered deck modules monolithically attached to a supporting wall; and a grade-level roadway comprised of deck modules monolithically attached to a foundation located at grade level. The deck modules are provided with integral layers of porous, bituminous paving material which provide a continuous, smooth, water-permeable running surface. Vehicles are directed along the aerial elevated and ground-level roadways by guide wheels depending from the vehicles and impinging on the guide beam fixed to the deck modules. A modification of the cantilevered deck modules provides aerial, elevated and ground-level roadways for transportation systems employing relatively small, light vehicles.

Methods for forming bubble cap assemblies for a gas and liquid contact apparatus

Abstract: Two methods are disclosed for forming two different bubble cap assemblies for mounting over holes in tray decks of a gas and liquid contact apparatus, as a fractionation tower. The basic method comprises forming an outwardly extending annular flange on the lower end of a riser having an internal diameter substantially equal to the hole diameter, inserting an annular gasket seal having an inside diameter substantially equal to the hole diameter between the riser annular flange and the upper peripheral surface around the hole in the tray deck, forming an outwardly extending annular flange on the lower end of an inner sleeve contiguous with the inner surface of the riser and hole, inserting an annular gasket seal having an inside diameter substantially equal to the hole diameter between the inner sleeve annular flange and the lower peripheral surface around the hole in the tray deck, mounting a top spider having a sleeve therein on the riser, mounting a bubble cap on the top spider, and inserting a hold-down stud up from the bottom to protrude through the top of the bubble cap, and attaching a fastening means on the top of the hold-down stud protruding from the top of the bubble cap assembly for applying pressure to both of the annular gasket seals on the upper and under peripheral surface of the hole for assuring proper alignment of the bubble cap assembly relative to the tray deck and for providing a double seal between the tray deck and the bubble cap assembly for minimizing leakage. Additional method steps are disclosed for forming a modified bubble cap assembly.

Logistical support of offshore drilling facilities

Abstract: A system for logistical support of an offshore drilling facility from a shore-based supply location includes a plurality of modular work deck units, a self-propelled vessel, and a plurality of one dock facilities at the supply location. The vessel releasably mates with and supports any one of the work deck units and cargo carried thereby. The vessel is ballastable for increasing and decreasing the draft of the vessel when the vessel is mated with a work deck unit sufficiently that the vessel can ballast down from a separately supported work deck unit and move out from thereunder. The dock facilities are defined for movement thereinto of the vessel with a work deck unit thereon. The dock facilities are each defined for engaging and supporting a work deck unit therein both for loading and unloading of cargo to and from the deck unit and for transfer to and from the vessel in response to ballasting of the vessel relative to the dock facility. Further, the drilling facility is arranged for receiving and discharging a work deck unit from and to the vessel.

Off-shore drilling and production platform and method of building same

Abstract: An off-shore drilling and production platform with a working deck for location above the water level and with legs for supporting the working deck and for resting on the sea bed. The legs diverge downwardly and have hollow sections while being interconnected at their upper regions only.

Barge ship dual trucks to transport barges thereon

Abstract: A barge-carrying ship comprising a crane of a lifting-beam type installed at the end of the ship for hoisting barges afloat, runway rails laid on the upper deck and along the inner walls of the both sides of the hull, barge-end-holding trucks disposed in pairs on the rails to travel thereon, each pair of said trucks being capable of taking over a hoisted barge from the crane and carrying the barge while supporting the same at both ends, and another lifting-beam crane installed amidships along a hatch opening of the deck for hoisting the barge from the pair of trucks and lowering or raising the load.

Use of precast-prestressed concrete for bridge decks

Abstract: A precast, prestressed concrete bridge deck system has been designed to be used either on new bridges or for the replacement of deteriorated decks. The report summarizes the construction activities, static load tests, and the present physical conditions of the two field installations constructed during the summer of 1970. This investigation has shown that precast prestressed concrete bridge decks provide a durable deck which can be constructed in a minimum amount of time. The actual time required to place the plank was two days at both field installations. Static load tests and visual inspections have indicated no significant changes in deck performance over the past five years. /FHWA/

Electrochemical removal of chlorides from concrete bridge decks

Abstract: The spalling of concrete bridge decks is largely due to corrosion of the top layer of reinforcing steel. This corrosion is induced by chloride ions, which enter the concrete when deicing salt is applied to the deck surface. The construction of many new bridge decks is based on techniques that either prevent penetration of chloride or ensure resistance to chloride-induced rebar corrosion. However, the many salt-contaminated decks that now exist demand attention. Besides costly patching of spalls, only cathodic protection of the steel is currently available as a remedial measure. This paper presents the results of an investigation of an electromigration method for removing chloride from contaminated concrete decks, which prevents rebar corrosion. In this method, the chloride ion moves through and out of the concrete under an electric field applied between the rebar (cathode) and a surface anode. A preliminary laboratory investigation demonstrated the viability of the technique and identified optimum voltage (100 Vdc), treatment time (12 to 24 h), anode material (platinized titanium), surface electrolyte, and chloride fixant. A field trial on a 3 by 6.1-m (10 by 20-ft) section of chloride-contaminated bridge deck was conducted in which laboratory-optimized parameters were used. Under the best conditions, 90 percent of the chloride was removed from the concrete above the rebar; 88 percent was removed from the concrete immediately adjacent to the rebar. Potential measurements have shown that the previously actively corroding rebar became passive after treatment. /Author/

Method of loading automobiles through the side opening of a rail car

Abstract: Automobiles are lifted from alongside a fully enclosed multi-level deck rail car and loaded onto the decks through a side opening of the rail car The automobiles are pushed forwardly from the rear towards an end of the rail car Detachable securement means on the decks and the frames of the cars cooperate automatically in response to forward movement of the automobiles to compress the spring suspension systems of the automobiles and lock the automobiles to the decks to prevent longitudinal or sideward movement of the automobiles on the decks during transport

Building deck structure

Abstract: A sheet metal structural shape for use as a stud or mullion in wall construction or a purlin or sub-purlin in deck construction which is symmetrical about a vertical bisecting plane having a central vertical web, two diagonal legs projecting downwardly from one end of the web forming an included angle of about 30° to about 90°, each of the diagonal legs having a leg projecting downwardly at its extremity in a plane substantially parallel to the web, each of the parallel legs having flanges extending outwardly at their extremity, a closure side extending between the extremities of the flanges enclosing the area formed by the diagonal sides, parallel sides and closure side, and a stiffening member at the other end of the web. A wall structure utilizing a spaced series of the metal structural shapes with a wall material attached to the flanges of adjacent structural shapes. Also included in this invention is a double wall construction wherein a second wall material is attached between adjacent metal structural shapes to a flat face of the stiffening member of the structural shape. The wall structure is particularly suited to shaft wall construction. A poured concrete or a precast deck structure utilizing a series of the metal structural shapes of this invention providing deck structures of superior insulation, fire resistance and uplift resistance.

Transportable bridge and method

Abstract: A transportable bridge is provided which may be erected across a wide, e.g. 150 foot, depression, and with access to only one bank of the depression. The bridge comprises a pair of abutments and a plurality of deck units. The abutments are laterally extensible, and erectible, from a collapsed state; they each comprise a base, a pair of backstays pivoted to one end of the base, and a pair of beam columns pivoted to the other end of the base, the backstays and beam columns being at small, acute angles to the plane of the base in the collapsed position, and being erected to form a triangle in the use position. Connecting means at the free ends of the backstays and beam columns are automatically engaged upon erection. A pair of reaction beams each has one end pivoted to a beam column, intermediate its ends, and extends over the base and past the one end of the base: anchoring means anchor the reaction beams to the ground. The reaction beams have inwardly extending haunches, which form between them and the base a passage for the deck units. Each deck unit comprises a pair of spaced upper longitudinally extending bars connected to a pair of lower such bars, with all bars parallel. A bearing element extends transversely through the deck unit intermediate its ends, the dimensions of the deck unit and abutment being such that the bearing element engages the bottoms of the haunches of the reaction beam, as the deck unit is pushed through the passage of the abutment. The deck units have coupling means at their ends, to connect them end to end.

Binary Flutter of Suspension Bridge Deck Sections

Abstract: Wind tunnel experiments on models of suspension bridge deck sections with plate girders of various heights are made to show that binary flutter of suspension bridge deck sections can be classified into three types which have different mechanisms of excitation; i.e., the classical type flutter, the single-degree-of-freedom type, and the intermediate type. Analyses on an energy equation of bluff structures with many degrees-of-freedom are also given to establish the theoretical basis of the classification of binary flutter. Although the geometry of the deck section is found to be the most dominant parameter that influences the type of flutter, it may also depend on various other parameters. The uncoupled frequency ratio is chosen, among others, and its effects on the three types of binary flutter are investigated.

Upper boat deck

Abstract: The cabin of a boat is enclosed or covered by an upper sun deck having a relatively flat surface with two elongate recesses of a depth approximately equal to the height of a chair seat. One recess forms a walkway extending substantially the length of the flat surface along one side thereof, terminating at the stern end in an access opening and at the bow end in a transversely wider cockpit section. The other recess extends less than the length of the flat surface. The flat surface and recesses combine to provide a "table" area and comfortable seating for a plurality of passengers.

Cathodic protection of bridge decks: a study of three Ontario bridges

Abstract: Many concrete bridge decks are being damaged by surface spalling or internal delaminations caused by corrosion of the reinforcing steel. Cathodic protection can be applied to bridge decks to stop this type of damage. Cathodic protection was applied to three bridge decks in Ontario: two slab decks on AASHTO beams and a voided, posttensioned structure. Each deck was equipped with resistance probes, which showed that the corrosion of the reinforcing steel was stopped when cathodic protection was applied. The bridges were studied to determine the minimum potential required and the most advantageous electrode configuration and spacing for adequate protection. The technique for measuring the polarized potential on the steel was studied, and probes buried in the conductive layer were found to be more effective than half-cell measurements. Data for all three bridges are presented. The protection on the first two of these bridges has been operated successfully for 1 year, and that on the third bridge has been operated successfully for 9 months.

Barge-carrying ship

Abstract: A barge-carrying shiphaving an opening at one end provided with an elevator for lifting barges from the water surface. Rails are laid in the fore-and-aft direction on the upper deck and along the inner walls of both sides of the ship's hull for the transportation of the lifted barges to the points where they are stowed. Barge trucks equipped with low-lift means for raising and lowering the loads thereon are movable along the rails, a pair of said rails. Supports are provided protruding inwardly from the inner walls to support the barges after being moved to stowed accomodation by the trucks.

Method and apparatus for securing pylon and deck to the hull of a sailing vessel

Abstract: A tubular pylon secured to a deck is provided with a core telescopically and slidably received in its distal end. In securing the deck to the hull, a well is provided in a shoe to be received in and secured to the hull. Glue is inserted in the well and applied along the intended glue seam between the deck and hull. The deck/pylon assembly and hull are then assembled to be clamped in a jig. During assembly, the core acts as a plunger to force glue in the well of the shoe upwardly about the outer surface of the pylon to secure the pylon to the shoe. The core is frictionally held by the pylon to exert a desired force in holding the shoe against the inside of the hull while the adhesive sets to secure the shoe to the hull and the deck to the hull.

Ship's hull

Abstract: A displacement ship for the transport selectively of low and high density cargo includes a hull having a trapezoidal cross-section and extending between the stem and stern of the ship. The sides of the hull form an angle of from 35° to 55° with the horizontal and extend upwardly above the design water line of the ship a distance at least equal to one-fourth the height of the hull. The upper extremities of the side walls of the hull terminate at the main deck of the ship which is coextensive lengthwise with the hull. At least one additional deck adapted to store low-density cargo thereon and coextensive in length and width with the main deck is positioned thereabove.