Tilt-Up Panel Applications - Thesis Example

Thesis, Engineering and Construction The main aims of tilt-up panels entailed construction indicates a proven technique for erecting office buildings, distribution centres, retail centres, warehouses call centres, commercial structures manufacturing facilities and industrial structures with increased rate, enhanced safety and subsequent awesome construction-oriented cost benefits. The highlighted methods are above all other entailed eminent methods in the construction and corresponding building industry in Australia. The process highly entails intense use of mechanized systems and corresponding machines. These machines include large cranes lifting machines it usually it has created the eruption of huge buildings overnight in most region in Australia. Key wordlist Tilt up- inclination process of panels while constructing structures Stress: pressure acting on a body surface Precast concrete: method of construction where product formed by casting concrete in mostly reusable form which is then cured in a very controlled setting and ferried to the construction site. Cast insitu: Concrete is poured normally where at its permanent position. Expandability: the thermal effect heat that results in expansion of structures Concrete Strengths: the ability of materials to resists tensile stress Acknowledgements I dedicated this thesis to my parents (Mr. and Mrs...) who have always supportive and cherished my hard work from childhood. Life has been through thick and thin but their back up and supportive has always strengthened to run over them. Lastly, I thank the following persons and groups for their endeared time resource and services they provided to me while researching on this paper. 1. My lecture…………………. 2. My Supervisor, mr or mrs……………….for continuous guide on the topic 3 University of Melbourne library 4 Universisty of Sidney library- provided updated data on tilt panel technology 5 Meadow burke engineering firm- for critical measurement statistic and photographs collected Table of Contents Table of Contents 4 Fig c: Wall panel rigging 8 Fig a: Threaded inserts 8 Fig a: Threaded inserts 30 List of table Table a: working loads data Graph 1: Stress analysis and brace analysis List of figures Fig d: shear loads and tension on edges of the any lifted component Fig c: Wall panel rigging Fig b: grout tube Fig a: Threaded inserts Notation Concrete cast in place Brick common place Steel and other metals Strain , normal or linear Strain or shear Stress normal Stress shear INTRODUCTION Background The essence of tilt-panel applications in the contemporary society is invaluable due to its increased applications in the society. The old but re-invented method has attracted praise in various sectors worldwide. The mechanism is dependent highly on mechanized systems that were not applied in the past and, therefore, it is actualized as amongst best technologies in the building industry the globe has seen in the near future (Chen, Wai-Fah, & Toshio Atsuta, 2008). Objectives The objective of this research and thesis include: To assess the historical background of the technique To evaluate the extents to which the methods been applied in Australia To assess the mechanical and structural analysis of the tilt panels thus ensuring their apposite safety as required by standardization bodies. Scope of the thesis The scope of this thesis reinvigorates, re-energizes and recognizes the firms widely applying the technology Australia and their valuable regards for inclination towards enhanced safety and civil engineering and structural conducts. HISTORICAL BACKGROUND Tilt-up construction method is typically an old design with newly reignited innovations the indispensable principle on tilt-up construction which describes constructing walls in a horizontal manner on the ground then subsequently lifting them into desired place. Substantiation evidence exists that some common buildings constructed under the Roman Empire rule, and the subsequent middle Ages also applied approach. More lately, American settlers around 1800s gathered for conventional "barn raisings" under which they constructed the huge wood walls for most of their buildings and then consequently tipped them up into desired place. On the commencement of the 20th century, the accurate beginning of current tilt wall construction was marked. The establishment of concrete well reinforced with rebar commonly in the early 1900s permits builders to generate tilt-up commercial structures similar to how the practice is undertaken today. Conventionally, one- to two- typical story structures well built with mainly walls comparable in terms of width to those other buildings created by applying other methods of construction. Contrary to the imperativeness exposed, tilt-up construction did not have wide acceptance but after World War II, after the development of the first mobile crane. Introduction of mobile cranes uniquely allowed builders far better ability to hoist massive panels into desired place, and this was regardless of the place where the job site was being undertaken. Similarly at this period, ready-mix concrete was invented and introduced to the building industry thus making tilt-up a very viable alternative as compared to the other competing techniques. The combination of the new technologies well occurred at specifically the correct time. Over many years, the industry experts have extensively continued to purify, refine and enhance the technique on tilt wall process. This allows the general contractors or even design-building or construction managers to run greater capabilities and enhanced creativity in its application and the entailed use. Globally, tilt wall has well-been used in various buildings as bulky as 1.7 million entailed square feet, with each panel nearly reaching as towering as 91 feet and even weighing virtually 150 tons. In USA, virtually 15% of every industrial building was erected on by using the tilt-up technology. The selection of concrete as adopted method of building was increasingly undertaken in commencement of the 20th century. The process of adoption by the Australian building and construction industry has been rather steadily and gradually as it has been undertaken in major nation like USA, Canada and Mexico. Discussion of the latest work in the area The latest work undertaken in the method and technology applied to Tilt-up construction mainly were undertaken with quest of raising the outstanding functions of the technology and its proper utilization and incorporation into contemporary sequence. Currently, tilt-up development begins with typical job site preparation and specifically on pouring the slab. On this phase of the prospected project; workers, usually, install footings adjacent and around the slab while preparing for the panels. The relevant crew, usually, gathers the panel forms to the slab. Usually, the form is well-created with designed wooden pieces that are subsequently joined together. The presented forms act similar to mould for the entailment of panels. They offer the panels accurate shape and size, window openings, and doorways thus ensuring that the panels suits t the design specifications and eventually fit together correctly. Another lot of workers well tie in the designed steel grid for reinforcing bars into the availed form. They correctly install inserts and entailed inclusion and embed for lifting the entire panels and thus attaching them to the exact footing, to each other and to the roof system. Usually, the slab underneath the forms is well-cleaned of any eminent debris or even standing water as workers dispense concrete into the various forms to generate the panels. Following the solidification of the panel’s removal of the forms, the crew connects the initial panel to a hefty crane with suitable cables that normally hook into the various inserts. The applied size of the crane well depends on the elevation or height and weight of the used panels, but it is characteristically two to three multiples the size of the principal panel. The engaged crew also well attaches braces to the various panels. The crane steadily "tilts up," or lifts up the panel from the original slab into a vertical standing position above the eminent footings. Workers are normally assigned the roles of helping to guide the panel into location as the crane sets it. They join the braces from a specific tiltwall panel on to the created slab and also fasten the panels embeds to the desired footing, and finally disconnect the cables attached to the crane. The engaged staffs or worker proceed to the next panel and typically conducts repeat of the process. It is normally easy for the viewer to be amazed as he watches the mobile crane hoist and tilt up a concrete panel from the earth and set it well into its desired place. Massive and huge panels that are weighing virtually 50,000 - 125,000 pounds or even more dangle on the crane’s long lines. The job demands that the crew continually work as a team while setting the braces and continuously guiding the panel with extraordinary precision. The pace of the method is also very remarkable; a well-experienced tiltwall crew member can easily erect as countless as 30 panels in a day. After all the panels are well erected, the crew normally applies finishes to the designed walls using sandblasting or even painting. They caulk all joints and keenly patch any eminent imperfections in found in the walls. From that point, the team then moves to the fitting of the roof system as the trades commence their job inside the building. Main reasons for choosing tilt up panels or constructions Tilt-up panels and construction provide plentiful advantages over traditional steel buildings or even conventional construction for warehouses. In addition, tilt-up panels help in distribution centres, call centres, retail stores, storage facilities, office buildings and other groupings of industrial or even commercial projects. Boldly speaking, a one- to two-story construction bigger than 50,000 square feet and having less than 50% wall gap space is an exceptional candidate for erection of tiltwall. Introduction of tilt-up panel in the Australian construction industry The exact time, when tilt up panels designs and use, was introduced into Australian industry remains elusive but the introduction runs along with the formation of the Tilt-Up Concrete Association, which is abbreviated as (TCA). TCA is majorly an international nonprofit trade organization for the worldwide tilt-up concrete building and construction industry and was initially founded in 1986 by a dedicated faction of contractors, manufacturers and professionals with the great interest of highly improving the excellence and acceptance of tilt-up process and construction. The overriding mission of the entire Tilt-Up Concrete Association is typically to expand and inherently improve the utilization of tilt-up as the only preferred building system by enhancing and providing relevant education entailed resources that properly enhance quality and concurrent performance. Peter Courtois contributed immeasurably to the Tilt-Up industry in Australian through his tireless endeavor and dedication to a number of industry associations. In Australia Tilt-Up concrete building and construction is not a new concept as it has been in application since the assumption of century. The industry has developed since the mid-1940s and established into the preferred technique of construction for numerous types of buildings and corresponding structures. Nationally, over 15% of entire industrial buildings are made from Tilt-Up, which ranges from in size from 5,000 to virtually over 1.5 million square feet. The designs are typified by their enhanced attractiveness, longevity and efficiency. The eventual adoption and spread of the use of tilt-up panels lead to the ultimate expansion and enlargement of the various construction companies. Some of the Australian companies entailed in the process of manufacturing, sales and supplies of the products include Reid Company, Shelford Constructions and Turner Precast Bunbury who is the main industry leader in supplies precast construction and tilt-up. Turner Precast Bunbury is mainly located in the Western Australia. The company specializes in mainly precast, in situ concrete and tilt-up construction for entirely types of residential construction and commercial ranging from warehouses, factories, retail outlets and apartments. Another typical player in Australian tilt –up panel industry is Reid Company that started life as an all-round engineering supply virtually ninety years ago.  With extensive expertise in multipart formwork and entailed brick and steel building and construction, Shelford Constructions wholesomely boasts an extensive expertise and skills base in mainly precast tilt-up concrete panel design and construction and the exploit of composite building materials. Similarly, Shelford Constructions is hugely Perth’s tilt-up concrete panel design and construction specialist. The company applies cutting-edge technology and excellent production techniques. The company is characterized by a team of highly experienced in segment of precast tilt-up concrete panel design and construction and is highly boosted with growing excellent list of completed nicely precast construction projects, strength and style and unmatched for stability. Prior to marketing the tilt-up panels and market analysis Prior to marketing tilt-up panels, the industry has always been responsive. The adoption of the tilt-up panel in the market has always taken an exponential curve. The redefining of the tilt-up industry and improving the technology have left people opting for the technology. The market has always preferred the method due to low cost, best constructability, excellent performance while under service loads or the performance mainly under ultimate loads, aesthetic and enchanting appearance, excellent fitness for purpose, nice conformance with codes , enhanced speed of construction , excellent adaptability, properly accepted building method and ease of expansion. The technology also sales reducing trades, notable speed of enclosure, elevated safety, improved market acceptance, variability and a wide choice of supply. it further has minimum lead time or even security of enclosure, absence of no scaffolding, awesome durability and the finally absence of wet trades. To enhance successful marketing, the companies entailed in the business have always reviewed their grasp of what the market needs. Effectual marketing campaigns that the companies conduct is intensively effectual in providing excellent rewards to the company. The companies employ proper staff training, mentoring and personal development workers. Graph: A steady rise in tilt-up use According to the graph, the use of tilt-up has always risen as from the data indicated (1993) to (2003). The rate still applies to the current status as adoption of the tilt panel use is well spearheaded by various constructions contracting firms. The companies have also continued to improve staffs teams skills in majorly three main areas of marketing (Chen, Wai-Fah, & Toshio Atsuta, 2008). The sales and marketing team comprises of excellent communication, networking and awesome negotiation. They identify excellent Good marketers who are strong communicators and properly astute business operators. The companies realize that team’s enhanced communication skills will facilitate them make successful deals with various suppliers and even service providers thus maintain relationships with the customer base, and build precious networks in the corresponding market. The companies entirely recognize that in larger businesses, the companies usually navigate multifaceted internal discussions and thus communication skills assists in negotiating marketing goals with various sales teams. Proper Collaboration between marketing and sales teams provides an excellent path to success. Distinct separation of sales and marketing segregated teams is highly imperative. The essential part of marketing success and gradual involving them in recurrent development of marketing strategies has always facilitated the growth of the various tilt-up panel companies soar into high heights thus helping in motivation and focus for the to achieve their marketing objectives (Chen, Wai-Fah, & Toshio Atsuta, 2008). The companies in unison have always evaluated and understood their strengths, eminent weaknesses, opportunities and even threats in a notational SWOT analysis process. This practice in turn has helped in making informed decisions and conveyed excellent marketing effectively. In the enhancement of their marketing skills, the companies have always evaluated pros and cons for their business’s operating systems, legal obligations, financial commitments and workforce skills. The industry has also adopted developing a targeted and enhanced direct mail campaign within the competence of their database of many potential customers and appropriately spent their marketing budget or entailing staff in majorly personal selling campaign that surpass and excel in the indispensable communication skills. The companies have also adhered to privacy regulations in most telemarketing campaigns. Effects of tilt-up in the construction industry The introduction of tilt-up panels in the construction industry has created benefits which are subdivided into mainly three sections including masonry, economy and safety sections. The benefits have been instrumental in shaping the future of tilt up use. Masonry Swift Construction Schedule Tilt panel and tiltwall, usually, offer numerous opportunities to typically "compress" the timetable and hence deliver the building very rapidly. The process of erecting the walls with application of tilt-up panels is usually faster than a normal process of building walls using conventional construction techniques. The entailed trades usually begin work normally earlier in the course on a tilt-up project, thus permitting greater overlapping of several project phases. Since the building is usually made of ready-mix concrete from well local sources, the mission is commonly less likely to be influenced by transportation delays or entailed inconsistencies. All these matters provide for a more enhanced, faster, more expected and predictable schedule with fewer avenues or opportunities for any delays or linked associated cost entailed overruns. Attractive Aesthetics Mostly, Tiltpanel and tiltwall buildings and structures are hugely not prefabricated. Habitually, one is custom-designed options rendered by the client or according to her or his preferences. A complete range of building or constructions finishes, adornments, wall textures, colours, even most curved walls, are presented with this technique. Tilt-up technology provides the architects and other designers with practically unlimited suppleness and flexibility in crafting buildings that are functional, aesthetically pleasing and durable. Ease of Maintenance Most of the Tiltwall buildings and structures usually require slight in the way of constant maintenance, exterior of periodic clean-up and even repainting as normally desired. Concrete is usually impervious to rodent or insect infestation, so this crisis becomes a comparative non-issue. Repairs or Expandability In any case or event a wall is spoiled by a forklift or truck, such damages are classically more restricted on a panel as compared to any other types of building structures for instance steel buildings. Other entailed, modular design and models of the panels normally allows for easier and enhanced repairs or even expansion of the entire building (Ames, Droessler, & Hoit, 2011). Economy Cost saving on constructions Tiltwall and panels provide abundant construction cost savings as this process of construction applies to locally available materials as compared to the ones that should be manufactured and subsequently shipped in mostly.. It thus indicates that raw material costs are, usually, lower, accessible when anytime needed and less likely to vary in terms of prices. Consistently, tilt-up work teams are typically smaller than other crews used in established construction and are hugely comprised of neighbouring labour. That eventually translates to highly reduced labour related costs. Due to the economies of scale, the bigger the size of footprints of the building, the increasingly these savings advance the projects anticipated total cost. Durability Most Tilt-up buildings and structures are tremendously durable. Several structures created or build in 1940s are still well in operation t currently, with less indication of any apparent wear. This is a testament to the extensive strength of tilt-up structures (Chen, Wai-Fah, & Toshio Atsuta, 2008). Reduced Insurance Premiums Since tiltwall buildings normally have superior fire resistance ranking and have well been proven to withstand ruthless weather and earthquakes, the structures and corresponding buildings characteristically enjoy superior insurance rates as compared to steel buildings or even other kinds of structures. Highly Reduced Operating Costs Concrete provides superb insulation, thus reducing the ever increasing and ongoing heating or even cooling costs for any tenant. The extension of insulation is normally extended to sound as well as temperature and usually staffs in a tiltwall office structures and building typically located in noisy and loud areas will be less influenced by the environment. Similarly, any manufacturing business that hugely generates noise will create less noise impacts on its neighbours thus will find it effortless to comply with local availing ordinances. Safety Fire Safety A great deal of the concrete built using tilt-up panels normally meets the fire-resistance required standards of even mainly demanding building codes. For instance, a 6.5" concrete designed wall offered a nice fire resistance and extended rating of beyond four hours or even more. Tilt-up panels are also regularly used in the process of buildings interior as designed firewalls. Tiltwall buildings normally offer real guard and safety for the tenant, employees, ongoing operations and property. Security For most facilities that need positive security or even management of the proper interior environment like prisons-businesses with very clean rooms or classified manufacturing facilities-will value the strength and entailed control or power afforded by concrete or even tilt-up buildings (Chen, Wai-Fah, & Toshio Atsuta, 2008). Elevated Safety standards Use of tilt-up panels is well-proven as a safe method of construction and building. The vast preponderance of the various projects normally takes place on the earth instead of on scaffolding. This reduces many of these hazards and inherent risks normally faced by construction workers. Since tiltwall buildings usually have higher fire resistance ranking and have always been proven to endure ruthless wind, weather and earthquakes, the structures and equivalent buildings routinely enjoy superior insurance rates in comparison to steel buildings or even other kinds of structures. Tilt-up performance on fire or windy weather The effects of the earthquake in Australia have been relatively low. The recent one occurred near Mulga park, and another one occurred at Moe Victoria and the last one happened in pukatja-Ernabella and even in northwest of Western Australia. The eminent image with most of the earthquakes indicates that tilt-up building are least affected by the great impacts of the scenario. The behaviour of the constructed structures during the Canterbury Earthquakes is typically reviewed. Buildings incorporating tilt-up structure have normally performed well throughout the Canterbury Earthquakes. In the majority of cases, earthquake damage to most of the buildings were repairable. The considerations are even taken including the situations where escalated liquefaction-induced model settlement occurred. Typically, ductile panel connections have shown and exhibited good seismic performance. Moreover, the application of highly cold-drawn mesh does not result in any notable panel failures being initiated on the face loading. Most commercial buildings built in Christchurch, which was mainly built using tilt-up construction methods. The building has always been, subjected to the escalated Canterbury earthquake series. Tilt-up into a wide field of structural applications has raised safety issues on site The introduction of tilt-up panels into the vast field of structural applications has enormously raised safety issues on site. The comprised techniques of pre-casting, Lifting and fixing have always developed cooperation in the industry and thus resulting in elevated union interests. The industry has always responded by developing up-to-date expertise on developing every intrinsic component of the various portions entailed in the preparation process of the tilt-up panels. The various eminent portions include consideration of whole loads, concrete strengths, pick-up points, pick-up point design oriented service, connections, joints, tilt up panel composite construction and the whole structural design. the evolution of the field has always been sponsored by TCA and other relevant branches. Structural design Scientifically proven criteria have been designed to guide in structural design of the tilt panel. Hence, structural design and model of the concrete elements and components should be conducted in accordance with the outlaid requirements of AS 3600 and AS 3850 as indicated. The system has identified critical and appropriate provisions of smooth and safe running of the Industry Standard. Entailed slenderness or stability is, usually, the major considerations while undertaking design of precast and corresponding tilt-up concrete elements. Most Precast concrete construction typically lacks the desired continuity intrinsic in typical cast insitu concrete structures. The designer is mandated to address these issues as normally. This is because the structural members that usually support precast or even tilt-up elements are well designed to permit the circumstances where an element may bear on merely two discrete points while erecting. Tilt up panel Composite construction Typical composite concrete derived elements created by adding insitu placed concrete to steel section must be designed by entailing project design engineer thus accommodating the progressive and enhanced loading and strength at every stage of the entire construction. Typical Loading scenarios include uneven loading the designed precast element in erection or while pouring the insitu concrete. In typical scenarios where, the entailed design of the composite panel element is located or based on a specific erection and having insitu pouring sequence should visibly be specified on the engineering drawings. In such cases, steel beams are extensively used in support of the tilt-up panels (Trifunovic, 2006). Precise concrete elements and entailed care are deeply taken while assessing the presented stability of the beam while constructing. Common friction forces acting between concrete and steel are usually not considered as availing stability to the entire beam. Where precise roughness is dearly required on the exterior of the precast element to supply a key for the available insitu concrete and must be clearly specified on the applied drawings. Where impermanent propping is also required on erection or even for supporting the insitu placed concrete, the requirements must also be vividly be shown on the drawings (Trifunovic, 2006). Joints Properly designed joints having gaps in between adjacent tilt-up concrete panel and elements is sufficient to uphold designed position or alignment while erecting and hold tolerances and any expected movements (Beaver, 2011). It is provided that, joint widths amid adjacent elements must smaller than: • 15 mm on joints with flexible entailed sealant • 20 mm for grouted or mortar joints • 150 mm for insitu concrete placed infill Concurrently, while selecting joint filling substances or materials prior consideration must be given on: • Fire resistance level • Thermal and corresponding shrinkage movement of the panel element • Structural movements or entailed motion to be accommodated • Weather resistance Pick-up Point Design oriented service The appropriate choice of selected inserts and eventual analysis of their desired location must usually consider all the design entailed problems hugely involved in erection of the panels. The accomplishment of tilt-up as a construction scheme is based on the secure and safe and economical implementation of the erection process. When lifting a panel from level to vertical cases, it normally undergoes augmented stress in those momentous minutes than it will ever have as a structural unit. The stresses can mostly run nearly four times the predictable structural stresses. The accurate location of the entailed inserts is the chief factor that determines if the panel is usually raised perfectly flawless or whether it is dented or damaged by stress cracks (Beaver, 2011). Pick-Up Points According to Meadow Burke engineers, the site of pick-up points is typically located scientifically. This follows the fact that it entails delicate matching and balancing of negating cantilever moments and positive moments between the spaces on pick-up points (Booth & Key, 2006). This accurate placement normally minimizes flexural stresses exerted on the panel. Proper Selection of the apposite insert location is usually complicated by the comprehension that the stresses in the panel vary incessantly as the panel is perpetually rotated from original position, horizontal to vertical. Inclusion of computerized mathematical in analyzing the rotation analysis is derived from a period of years of enhanced experience and entailed consultation with virtually a dozen top rated engineers or even mathematicians from four of the nation’s (Australia) foremost universities. The correct balancing of the entailed bending moments normally require further regards for the tensile and entailed compressive strengths of the corresponding concrete. Due to this consideration, most analysis bases on the modulus of rupture of the used concrete. The used tensile strength of the entailed concrete on one surface and the corresponding compressive strength derived from the opposite face normally resist the eventual creation of cracks mostly in the concrete throughout erection. Factoring in whether bending moment is normally positive or entirely negative, the entailed compressive or tensile stresses will, usually, alternate in dissimilar places on the two faces of the element panel. Main effect of thermal reinforcing steel is hugely discounted in the eventual analysis of the entire hoisting stresses (Zhao, Wilkinson & Hancock, 2005). Reinforcing is normally placed at the centre and therefore the panel would generate serious cracks if in any case raised before the concrete reaching the least tensile and subsequent compressive strengths. If modulus of rupture is relatively low, the panel normally cracks to the steel reinforcing in the process of an erection procedure. The ability of cracking is normally minimized by apposite placing of curtains made from steel on both the bottom top faces of the entailed panels. This act is normally uneconomical and also entirely removes unwelcome cracks in the corresponding panels (Beatons, 2003). Fig d: shear loads and tension on edges of the any lifted component Concrete Strengths According to measurement and statistics by Meadow Burke engineers, a bare minimum compressive strength of approximately 2500 psi or (17.2 MPa) and corresponding modulus of rupture of 500 psi or (3.4 MPa) are a recipe for crack-free erection on tilt-up panels. It is normally assumed that common allowable tensile strength is 60% of the entire modulus of rupture (Zhao, Wilkinson & Hancock, 2005). Loads Tilt-up concrete panels and elements are designed with considerations on loads and conditions possibly to be experienced while manufacturing, lifting, erection, transportation, braced and also in-service phases. On top of the normal design oriented considerations, unique consideration is allocated to: • Seismic (earthquake) loads • Construction loads • Wind load impacting on the braced elements prior Erection loads • handling and transport loads To incorporation into the structure Normally erection-load design must extensively consider variations to the included precast elements or even load-distribution while lifting, impact during placement and rotation. Fig b: grout tube Fig: shear Fig a: Threaded inserts Elemental consideration of size and reinforcement While determining the prospected size and shape of any tilt-up concrete elements, there is intense consideration on factors like: • transport restrictions • Determination whether panels are to be cast at the site or even off-site • Size, configuration of availed crane for conducting erections(s) and capacity • Size of access to and in the site •lastly, bracing and entailed propping requirements When tilt up panels are to be cast way from the site critical consideration is highly given to limiting one dimension measurement, the panel can be transported by normal conventional means thus there is no need for a pilot or even special permit. On most concrete wall panels, the exact thickness must be critically determined by ensuring limiting the other extreme fiber tensile typical stresses thus section remains desirably “uncracked”. Proper reinforcement must then be selected by applying cracked-section examination. Extra reinforcement is further required at main openings and also at the temporary support junctions and points to appositely control cracking in tilt-up concrete panels or elements. References Bennett, D. (2002). Innovations in concrete. London: Thomas Telford. Gibb, A. G. F. (1999). Beaver, R. (2011). Another 100 of the worlds best houses. Mulgrave, Victoria: Images Pub. Group. Bennett, D. (2002). Innovations in concrete. London: Thomas Telford. Gibb, A. G. F. (1999). Off-site fabrication: Prefabrication, pre-assembly, and modularization. New York, N.Y: J. Wiley and Sons. Potter, R. J., & Cement and Concrete Association of Australia. (1982). Exposed aggregate tilt-up panels by sand embedment. North Sydney: Cement and Concrete Association of Australia. Beaton-Wells, C. (2003). Proof of antitrust markets in Australia. Sydney: Federation Press. Architectural science review. (1958). Sydney: Academic Press. Ward-Harvey, K. (2009). Fundamental building materials. Boca Raton, Fla: Universal- Publishers. International Workshop on Structures in Fire, Kodur, V., Franssen, J.-M., & Michigan State University. (2010). Structures in fire: Proceedings of the Sixth International Workshop. Lancaster, Penn: DEStech Publications. The Architects journal. (1895). London: The Architectural Press Ltd. Emmitt, S., Barry, R., & Gorse, C. A. (2010). Barrys advanced construction of buildings. Chichester, U.K: Wiley-Blackwell. Proctor, D. L., Group for Assistance on Systems Relating to Grain after Harvest., & Food and Agriculture Organization of the United Nations. (1994). Grain storage techniques: Evolution and trends in developing countries. Rome: GASGA. North American Tunneling Conference, & Eckert, L. R. (2010). North American Tunneling: 2010 proceedings. Littleton, Colo: Society for Mining, Metallurgy, and Exploration, Inc. (SME. Civil engineering. (1974). London: Morgan-Grampian. In Kurtz, F. S., & American Concrete Institute. (1997). Practitioners guide to tilt-up concrete construction. Farmington Hills, Mich: American Concrete Institute. American Concrete Institute. (1900). ACI manual of concrete practice. Detroit, Mich: American Concrete Institute. Twomey, A. (2006). The chameleon crown: The Queen and her Australian governors. Annandale, N.S.W: Federation Press. Booth, E. D., & Key, D. (2006). Earthquake design practice for buildings. London: T. Telford. American Concrete Institute. (1979). Concrete international: Design & construction. Detroit, MI: The Institute. Trifunovic, G. (2006). The great Australian DIY book: Projects for the home and garden. Sydney: Murdoch Books. Creese, R. C., Conference on Polymer Composites for Infrastructure Renewal and Economic Development, Constructed Facilities Center, & Conference on Polymer Composites for Infrastructure Renewal and Economic Development. (2004). Polymer composites III 2004: Transportation infrastructure, defense and novel applications of composites ; March 30 - April 1, 2004, Morgantown, West Virginia ; [Third Conference on Polymer Composites for Infrastructure Renewal and Economic Development]. Lancaster, Pa: DEStech Publications. Ames, D., Droessler, T. L., & Hoit, M. (2011). Structures Congress 2011. S.l.: s.n.. Jagadish, K. S., & Iyengar, R. N. (2005). Recent advances in structural engineering. Hyderabad, A.P., India: Universities Press. International Conference on Structural Engineering, Mechanics, and Computation, & Zingoni, A. (2001). Structural engineering, mechanics, and computation: Proceedings of the International Conference on Structural Engineering, Mechanics, and Computation, 2-4 April 2001, Cape Town, South Africa. Amsterdam: Elsevier. Hollaway, L. C., ACIC 2004, & International Conference Advanced Polymer Composites in Construction. (2004). Advanced polymer composites for structural applications in construction: Proceedings of the second international conference, held at the University of Surrey, Guildford, UK on 20-22 April 2004. Cambridge: Woodhead Publ. Melchers, R. E., & Hough, R. (2007). Modeling complex engineering structures. Reston: ASCE. Booth, E. D., & Key, D. (2006). Earthquake design practice for buildings. London: T. Telford. Structural engineering compendium I: A collection of papers from the journals, Journal of constructional steel research, Thin-walled structures, Engineering structures, Computers and structures, Construction and building materials, Journal of wind engineering and industrial aerodynamics, Marine structures 2000. (2002). Amsterdam: Elsevier Science. Zhao, X.-L., Wilkinson, T., & Hancock, G. J. (2005). Cold-formed tubular members and connections: Structural behaviour and design. Oxford: Elsevier. Chen, Wai-Fah, and Toshio Atsuta. 2008. Theory of beam-columns. Ft. Lauderdale, FL: J. Ross Pub. http://www.books24x7.com/marc.asp?bookid=23751. Bjorhovde, R., Colson, A., & Zandonini, R. (January 01, 1996). Connections in steel structures III: Behaviour, strength, and design : proceedings of the third international workshop held at Hotel Villa Madruzzo, Trento, Italy, 29-31 May 1995. Read More