Patent Application
20240102298
The present disclosure generally relates to systems and methods for securing construction site scaffolding. More particularly, the systems and methods utilize a unique scaffolding anchor to secure conventional scaffolding to a linear surface or different curvilinear surfaces.
Historically, tank builders pre-assembled, erected, and jumped their own scaffold system. This work process required additional site training and an expert to physically check and green tag the scaffold system. This division of labor is not optimized, and two separate crews must validate the readiness of the same scaffold. It is also common to see beam clamp type connections for most hanging scaffold systems. These usually are fixed, built-in place, in part or in whole, and are not easily moved once green tagged and put in use. Disadvantages include the tonnages required to achieve worker access to the various work fronts throughout the life of a project.
Customized scaffold systems are also common in tank erection. Typically, the customized scaffold system interfaces with a welded steel attachment. One disadvantage is that the scaffold is typically customized for curved steel plate structures and is not normally used for any other type of construction commodity (i.e., civil, structural steel, concrete work, etc.). The fabrication costs are thus higher for this type of scaffold system. Field erected tanks that are over three rings in height (approx. 30 ft) require specialized access that: i) provides worker access/egress at the work front; and ii) provides tank shell wind protection, which prevents the tank shell from blowing inward during high winds. These scaffolds are highly customized, costly and vary in design across tank projects (i.e., FETs, LNGs, Spheres).
The detailed description is described below with reference to the accompanying drawing, in which like elements are referenced with like reference numbers, and in which:
The subject matter of the present disclosure is described with specificity, however, the description itself is not intended to limit the scope of the disclosure. The subject matter thus, might also be embodied in other ways, to include different structures, steps and/or combinations similar to and/or fewer than those described herein, in conjunction with other present or future technologies. Although the term “step” may be used herein to describe different elements of methods employed, the term should not be interpreted as implying any particular order among or between various steps herein disclosed unless otherwise expressly limited by the description to a particular order. Other features and advantages of the disclosed embodiments will be or will become apparent to one of ordinary skill in the art upon examination of the following figures and detailed description. It is intended that all such additional features and advantages be included within the scope of the disclosed embodiments. Further, the illustrated figures are only exemplary and are not intended to assert or imply any limitation with regard to the environment, architecture, design, or process in which different embodiments may be implemented.
The systems and methods disclosed herein overcome the prior art disadvantages associated with conventional scaffold systems, which require customization for tank construction and thus, are not adapted for use on other construction projects. The systems and methods overcome the prior art disadvantages by using a unique scaffold securing device to secure conventional scaffolding to a linear surface or different curvilinear surfaces. The systems and methods may be used on various permanent plant structures during site construction activities so that the scaffold system components may be attached strategically and timely at the work fronts.
In one embodiment, the present disclosure includes a scaffold securing device comprising: i) a base adapted to be secured to a fixed surface, the base having a planar face and a support member substantially perpendicular to the base planar face, the support member and forming an upper extension and a lower extension at one end of the support member opposite a predetermined distance from the baseplanar face; ii) a coupler for temporarily coupling the scaffold to the base, the coupler having a planar face, a first restraining side, a second restraining side and an adapter affixed to the planar face for temporarily securing the coupler to the scaffold, the first restraining side and the second restraining side being substantially perpendicular to the planar face and separated by a support arm fixed between the first restraining side and the second restraining side for supporting the coupler on the support arm member of the base and a removable restraining arm coupled to the first restraining side and the second restraining side below the support arm for enabling coupling and decoupling between the scaffold and the base; and iii) wherein the securing device enables sufficient movement between the base and the coupler for securing the scaffold to a linear surface or different curvilinear surfaces.
In another embodiment, the present disclosure includes a method for securing a scaffold, comprising: i) securing a base to a fixed curvilinear surface; ii) securing a coupler to the scaffold, the coupler having a planar face, a first restraining side, a second restraining side and an adapter affixed to the planar face for securing the coupler to the scaffold; and iii) coupling the scaffold to the base with the coupler by adjusting the coupler based on the fixed curvilinear surface while the scaffold is coupled to the base.
Referring now to
The upper extension 114a and the lower extension 114b of the support member 112 form a combined length 904 that is longer than a distance 704 between the support arm 124 and the restraining arm 126 of the coupler 116 for limiting movement of the coupler 116 away from the base 106 and maintaining coupling between the scaffold system 104 and the base 106. The support member 112 extends the predetermined distance 902 away from and substantially perpendicular to the planar face 110 to enable sufficient movement between the base 106 and the coupler 116. Likewise, the first restraining side 120 and the second restraining side 502 are spaced apart a predetermined distance 706 to enable sufficient movement between the base 106 and the coupler 116. In this manner, the scaffold securing device 102 enables sufficient movement between the base 106 and the coupler 116 for securing the scaffold system 104 to a linear surface or different curvilinear surfaces wherein the different curvilinear surfaces may include cylindrical surfaces and spherical surfaces.
The removable restraining arm 126 may be coupled to the first restraining side 120 and the second restraining side 502 by passing the removable restraining arm 126 through an opening in the first restraining side 120 and an opening in the second restraining side 502. A cotter pin 202 passing through an opening at one end of the removable restraining arm 126 completes the coupling. The removable restraining arm 126 may be easily positioned by use of a handle 204 at another end opposite the one end of the removable restraining arm 126 with the opening.
The scaffold securing device 102 may be used to secure a conventional scaffold system 402 to a fixed curvilinear surface 404 (e.g., a tank) as illustrated in
The systems and methods disclosed herein, therefore, allow conventional scaffold systems to be supported at or above elevation on linear and curvilinear surfaces with the following jobsite benefits: i) adaptability (may be attached to various structures including curved steel walls (interior or exterior), structural steel columns/beams and concrete embeds); and ii) flexibility (install/remove pre-assembled/modular scaffold units and install at elevation 1, 2, . . . or install at elevation 1 and roll to next position at same elevation). Additionally, the increased mobility enables planning for reduced scaffold materials/tonnage and the scaffold can be moved to the next work front if not working concurrently. This saves on material, labor, and provides additional room/clearance at the jobsite to work separate crews or stage alternative materials or equipment.
Additional benefits may include i) Health and Safety—mature technology, high core competencies exist in management and field deployment; ii) Quality—mature technology, parts are mass manufactured with mature supply chain QA/QC, and SQ processes in place; iii) Productivity—improved EPC synergy across the entire process of scoping, specifying, shipping, erecting, demobilizing scaffolding materials for field erected tank work fronts; iv) Increased Digital—change in physical technology enables tracking with existing advanced analytic tools (e.g., power BI, telematics, material tracking, etc.) and plate structures may be added to the digital tracking systems in place; v) Future Readiness—readiness deliverables include: (a) scoping guideline enables straight forward scoping and specifying the technology for projects to support early proposal/estimate/feed work, (b) construction specification allows PM's/construction coordinators to specify and communicate during early planning and project execution, (c) constructability bulletin notification—communication for information and awareness that a solution exists and is ready for deployment; and vi) Sustainability—scaffolding suppliers will evolve and improve the technology.
The systems and methods also reduce i) supply chain demand and energy associated with manufacturing and shipping scaffolding materials; and ii) fuel demand (scaffolding material will ship on existing trucks, no extra trucks are needed). A typical adjustable metal scaffold could, for example, cost $50,000 or more for a 11.6 m tank. The scaffold is entirely customized, and most parts cannot be used on different diameter tanks. By contrast, the systems and methods disclosed herein would cost $2,126 per year for a 11.6 m tank and may include just one custom part, which can be used with conventional scaffold parts on all tanks regardless of tank size and configuration and allows customization in the field with existing scaffold parts.
The systems and methods thus, improve the overall process for accessing elevated field erected structures on construction projects such as, for example, field erected storage tanks, LNG tanks, and LNG spheres. The systems and methods may also be applied to non-tank scopes such as, for example, concrete walls with external structural steel and piping, structural steel racks, pipe racks and other elevated work projects as required.
While the present disclosure has been described in connection with presently preferred embodiments, it will be understood by those skilled in the art that it is not intended to limit the disclosure of those embodiments. For example, the systems described herein may be implemented in new system scaffold access applications or retrofitted to a conventional scaffold system. Further, the system described herein may be implemented in other access solution systems to achieve similar results. It is therefore, contemplated that various alternative embodiments and modifications may be made to the disclosed embodiments without departing from the spirit and scope of the disclosure.
This application claims priority to U.S. Provisional Application No. 63/409,502, filed Sep. 23, 2022, which is incorporated herein by reference.
| Number | Date | Country | |
|---|---|---|---|
| 63409502 | Sep 2022 | US |
