Objectives And The Functional Requirements Of Cladding System Construction Essay

Objectives And The Functional Requirements Of Cladding System Construction Essay There are some elementary objectives of the cladding system. These objectives are the reasons for the invention and adoption of cladding system due to our increasing construction technology and demands of clients. There are many types of clients, some are emphasize more on aesthetic value, some are emphasize more on functional value, some are emphasize on time of erection and even some are emphasize on construction cost. So, the primary objectives of cladding system can be concluded as below: Supply of enclosure to the structure with the function of essential protection against the natural elements such as wind, rain, storm and etc. Invention and adoption of dry construction method which is more advanced such as off-site prefabrication, off-site manufacturing and etc. Minimize the additional dead load onto the frame. Improve the aesthetic value of the structure or the architectural concept. Control internal environment. Thus, in order to accomplish these elementary objectives of cladding system, the cladding system must perform these functional requirements: Strength and Stability It should have sufficient strength to support its own weight between the points of support or fixings to the structure. It must provide adequate stability against lateral wind pressure. It is essential to allow the differential movement in material expansion and contraction between the cladding system, the structural frame and the adjacent building elements. Exclusion of Wind and Rain Generally, the method is to construct solid cladding systems with an outer leaf as a rain screen and inner leaf of light weight block for insulation. In order to accommodate movement and resist weather deterioration, the material that used to seal joints and claddings must be resilient enough. Durability and Freedom of Maintenance The frequency and extent of work necessary to maintain minimum functional requirements acceptable appearance must be minimized to save cost. There are some problems and requirements of maintenance of several types of material. These are some examples. For masonry, a little maintenance is needed only. Glass requires frequent cleaning and renewal of seal. Besides that, sheet materials such as bronze, aluminium and stainless steel will be oxidized easily and faded faster as compare to masonry and glass. Control of Internal Temperatures As we know, the solar is gained through glass panel. Thus, we must control the proportion of glazed to solid areas. Besides that, thermal control can also be achieved by some methods. For example, deep recessed window used in conjunction with external vertical fins and used of non-transparent external louvres. By the way, used of special solar control glass is encouraged also. Thermal Properties Additional insulation need to be provided by lining of the cladding materials. It must achieve the U-values that laid down in the building regulations It must avoid the problems that would arise from cold bridging and from surface and interstitial condensation. The problem of air leakage should be minimized. Environmental and Sustainability Issues It is defined as how much the cladding system can contribute to the overall energy efficiency of the building. Environmental friendliness of cladding materials also plays a very important role in these issues. Fire Requirements Due to the proximity of other buildings and the use class of the building, fire resistance may be required. In order to restrict the fire from spread over the internal and external surfaces and within voids, the lining material that used for insulation is made up of non-combustible materials. Sound Insulation The resilient pad is used to prevent sound originating within the structure to be transferred vertically through the cladding members. Airborne sound originating from external source can be prevented by utilizing double glazing panel to window area. Aesthetic Issues The context within which the building is situated will determine the level of aesthetic of that building. Necessary to satisfy the aesthetic aspiration of the clients. General Function of the Building There are some functions of building that need to be stated and established such as day lighting and natural ventilation requirements, degree of privacy required, exploitation of pleasant views or exclusion of undesirable views and etc. A CLIENT REQUIRES A ROAD THAT REQUIRES LITTLE MAINTENANCE WITH REASONABLE NON-SKID PROPERTIES. WITH THE AID OF DIAGRAMME, SUGGEST A TYPE OF ROAD AND THE CONSTRUCTION METHODOLOGY FOR THE PROPOSED ROAD. The road that I will proposed which meets the demand of client is rigid pavement. Rigid pavement is made up of concrete road slab. These are some functions of pavement. Pavement provides a flat surface that makes the journey comfort. Pavement helps to transfer and distribute the transportation load onto the ground evenly. Besides that, pavement protects ground surface against weather effects such rain and wind. These are the characteristics of rigid pavement. Characteristics Rigid pavement Subsidence damage Considerable with expansion joints Initial cost High and require low skill labour Maintenance Low Appearance Glare from sun Non skid properties Reasonable Resistance to wear Good if the quality of concrete is controlled Ease of reinstatement Costly, difficult, require curing time Weakness The requirement of relatively frequently spaced temperature expansion and contraction joints, which also provides a less comfortable surface for riding. Construction Methodology The construction methodology of rigid pavement can be classified into several procedures which are placement, screeding, consolidation, finishing, curing and joints. Placement Truck or truck attachment is used to place the precast concrete directly to the desired position. Otherwise, placement machine is used for more accurate and even placement. Once the precast concrete has been unloaded from the truck, it tends to become less homogenous. Figure 1 Figure 2 Screeding During this process, the excess part of the roughly placed precast concrete is cut off to the desired elevation of slab. Generally, this is done by dragging a straightedge across the slab at the required elevation. Consolidation In this process, the freshly placed precast concrete is making to form a more uniform and compact mass. This can be done by eliminating unwanted air voids and causing it to move around potential obstruction such as reinforcement bar. Generally, consolidation is done by using vibrators which are formed by long and slender vibration rods. Vibrators can be drive by rotating an eccentric weight which causes the whole vibrator to move back and forth. Vibrators are used to excite particles within precast concrete mass. This will cause the particles attach each other closer and better flow around obstructions. Proper consolidation is very important to the performance of rigid pavement. It must possess adequate vibrations to enhance the durability. Too much or too little vibration will lower the performance of rigid pavement. Vibrator static head also influences the efficiency. Figure 3 Finishing In this process, the task is to create the final surface finish and texture of fresh precast concrete. In general, finishing can be categorized into 2 types which are floating and texturing. In floating, a flat surface is run across the precast concrete in number of times and may involve many different tools. This process is used to remove high spots, low spots and imperfections, embed larger aggregate particles beneath the surface and to prepare the surface of mortar for texturing with compaction. After floating, fresh precast concrete is quite smooth. A rough pattern is usually formed by dragging a broom, rough-textured item, or tinted instrument across the surface to enhance the non-skip property of rigid pavement. In general, texturing can be divided into 2 types which are Microtexture and Macrotexture. Microtexture is more common than Macrotexture. Microtexture is accomplished by dragging a section of burlap or artificial turf behind the paver. Curing The task of this process refers to the maintenance of adequate moisture and temperature within a precast concrete mass as it sets and hardens in order to develop the desired properties of strength, durability and density. Curing can be done by 2 different methods which are water curing and sealed curing. Water curing is method that prevents moisture loss and supply additional water to precast concrete surface. This method is labour intensive and generally not practices in rigid pavement anymore. Sealed method is method that prevents moisture loss but do not supply any additional water. This can be done by putting a waterproof covering over a slab such as plastic or using a liquid membrane-forming chemical compound. Figure 4 (Finishing) Figure 5 (Curing) Joints There are many types of joints used in rigid pavement. The basics of transverse contraction joint construction should include joint location, saw cutting timing, saw cutting depth and joint sealing. Joint locations are necessary to indicate on the construction plans and should be planned in advance. The timing of contraction joint sawing is determined by 2 main factors which are shrinkage cracking and precast concrete support strength and joint raveling. In the aspect of saw cutting depth, transverse contraction joints are usually cut to a depth of 1/4 to 1/3 of the total slab depth in order to make sure cracking only occurs at the joints. After the previous procedure has been done, it requires to be sealed to reduce the water and incompressible material entry. Figure 6 (Joint Layout) Figure 7 (Shrinkage Crack) Figure 8 (Sawcut Depth) DESCRIBE THE PERFORMANCE AND SPECIFY THE MATERIAL THAT CAN BE USED TO FILL THE VOID OF DISUSED STRUCTURES, EG: CULVERTS, REDUNDANT SEWERS, CELLARS AND BASEMENTS AND ALSO FOR SOIL STRUCTURAL STABILIZATION, EG: BRIDGE ABUTMENTS, TUNNEL STABILIZATION AND EMBANKMENTS. In our construction technology, there are many materials that can be used and performed very well in construction process such as concrete, plastic, stone, ceramic and timber. All of these materials possess advantages and disadvantages. In this question, the material that will be chosen is aerated concrete. There are a lot of reasons why I choose this material, aerated concrete. Aerated concrete is a highly workable and low density material which incorporating entrained air up to 50 percents. In general, it has the characteristics of self-levelling, self-compacting and may be pumped. Besides that, the risk of plastic shrinkage or settlement cracking of aerated concrete is significantly lower as compared to normal concrete. This foamed concrete is ideal for filling up the redundant or unnecessary voids such as disused fuel tanks, sewer systems, pipelines and culverts. Other than that, aerated concrete also has a good thermal insulation property. The aerated concrete can be fully utilized in several applications such as: Unwanted voids Pipelines Service ducts and shafts Bridge arches or subways Disused structures Culverts Redundant sewers Cellars and basements Higher structural stabilization Bridge abutments Tunnel stabilization enbankments Insulating fill Low density insulating sub-screed Insulating fill to house over-sites By the way, there are several highlighted final concrete performances of aerated concrete that can said to be the advantages of this kind of concrete. Aerated concrete contains high entrained air content. With this property, the aerated concrete is able to resist the damage that formed from freeze and thaw. Besides that, entrained air can acts as a good thermal and acoustic insulator. The aerated concrete has good cohesion ability. It can form a stable foam structure that reduces settlement and reduces bleeding and segregation. Other than that, aerated concrete possess controlled density and strength. For example, low strength of concrete enables the removal for subsequent access to services and maintenance. The range of densities and strengths available depends on the types of foamed concrete. Structure that formed by aerated concrete is very stable. It can generally be surfaced after 24 hours. Besides that, other materials can be combined together and included in the mix. Combination of different materials depends on the applications and requirements. There are some combinations such as polypropylene fiber, fibersteel, quarry fines, vermiculite, flyash and volcanic ash. Autoclaved aerated concrete is one common type of aerated concrete. It is a material like wood but without the disadvantages of combustibility, decay and termite damage. The initial cost of autoclaved aerated concrete is very high but it can be compensated by lower cost of labour, finish, maintenance, and energy. In terms of manufacturing issue, construction issue and etc, it is a good ecological choice. The autoclaved aerated concrete is very versatile because the mixture proportions can be modify to setup different insulation values and compressive strength. Due to the reason of autoclaved aerated concrete is light in weight and workable, thus it can reduce the construction time, waste and energy by faste r speed of construction. BRIEFLY DESCRIBE THE ACTIVITES INVOLVED IN EXTERNAL WORKS AT THE START OF THE CONTRACT. In general, external works is defined as the construction works that done externally from the main building. The external works can be divided into several main parts which are drainage requirements, temporary constructions, public utilities, special industries services, minor external buildings, security and lighting. In construction industry, most of the activities are spanned within the entire project period but some of the external works are involved at the start of the contract. These external works are drainage main runs, access arrangement, storage facilities, car parks, hard areas for plants and machineries for construction of foundation and service mains to building entry. Firstly, drainage will be explained in detail. Drainage can be divided into 2 main types which are surface drainage and sub-surface drainage. Surface drainage is defined as the removal and disposal of water from the surface of a pavement. Sub-surface drainage is the type of drainage that uses the underground pipes and other fittings to direct the flow of water from where it is not wanted to some other places. Sub-surface drainage might include land drainage. Land drainage can be defined as removing and disposing of surplus groundwater gardens, fields and other plots of open land. Surface drainage system often refers as channels that direct the surface water to a drainage outlet. These channels are made up of stone or precast concrete. This system usually discharges all the relatively clean water into a local watercourse such as ditch, stream or river. This system can reduce the demand on the effluent treatment plant. The relatively clean water usually consists of water from the roof and the paving. The channels are slope down towards the public footpath and highway. After that, the water will be directed into gullies or linear drain which will flow to the storm water sewers later. In surface drainage system, the gully and access point is function to collect and discharge the collected water into local watercourse. Generally, there are three types of gully and access point used to perform this function. They are individual trapped gully, continuous grating over precast channels and combined kerb and drainage system. In the aspect of individual trapped gully, there are many types of gully that have been used. P-trap and hopper is commonly used with rainwater pick-ups rather than use in large areas drainage of paving. Yard gully also know as a bottle gully, compact gully or an universal gully. Other than that, road gully is much larger than P-trap and yard gully but they work in the same way. The specifications of road gully are it has a fixed 150mm diameter outlet but come in a variety of diameters and depths. For example, road gully the used within the carriage ways is commonly used to drain an area less than 250m2. In the aspect of continuous grating over precast channels, it can be various sizes, from 50mm deep units for roof drainage to 250mm deep for motorway drains. These channels can made up of various materials such as polymer concrete, wet-press concrete, HDPE and stainless steel. In a specific application, the type of channels used will depends on the end use of the drain. There are two main types which are built-in fall units and regular depth units. Built-in fall units are channels that maintain a fixed depth along their whole length and compulsory laid to a fall. It is suitable to use in large drainage for flat areas such as car parks, freight yards, airports and etc. The regular depth units are suitable to use in short length drainage which has a natural gradient. Lastly, the combined kerb and drainage system have 2 main functions. It can acts as road isolator. Besides that, it is also a discharge point of collected surface water. Generally, sub-surface drainage system deals with foul water such as kitchen waste, toilet or soil and vent pipes, bath or shower or bidet and any industrial process. Besides that, this system can deals with both foul water and surface water such as rain water pick-ups, yard or road gullies and linear drains. Sub-surface drainage system consists of underground pipe line, manhole or inspection chamber and culvert. In underground pipe line, various materials can be used to make pipes such as vitrified clay, uPVC, concrete, ductile and cast iron (CI), glassfibre reinforced plastics (GRP), high density polyethylene (HDPE), pitch fibre and asbestos. In general, there are 3 main types of pipes which are socketed clayware, plain-end clay and plastic 100/150mm. There are 2 main types of jointing of pipes. Plain ended pipes are a type of pipes that have identical ends. They can be joined by means of a coupling. Other than that, socketed pipes have identifiable male and female ends. The method of laid must be in the way of female end pointing upstream. Next, access chambers are commonly not more than 600mm deep which provides an easy access for cursory inspection and access of maintenance equipments. Inspection chamber possess the same function as the access chamber but inspection chamber is larger than access chamber with a minimum 450mm diameter. Besides that, inspection chamber tend to have more branches or spurs feeding into them. Normally, the inspection chamber can be up to 1000mm deep. Manhole is the largest chamber that provides the same function. Manhole can be any depth with the minimum internal dimension of 600x900mm. There are two main types of manhole which are brick manhole and precast concrete manhole. After that, culvert can be defined as a structure which provides a waterway or other opening under a road. In general, the type of pipe culvert chosen should be class Z spun reinforced concrete with spun concrete collars or spigot and socket type. At the start of the contract, there are some external works that need to be done in order to proceed to start the construction works. The external works that need to be done 1st is to prepare and provide hard access to all parts of the site, hard storage for materials, site facilities and car parks. Generally, in order to reduce the cost of temporary road and access, the contractor will lay the base course of the future permanent road as the temporary road and access. There is a way to keep the site temporary road dry for the convenience of construction works which is laying the drainage system as soon as possible. Public utilities services are very important to a building. Thus, all the public utilities need to be planned carefully before any major structures are built. Any constructions of service mains and ducts should be constructed concurrently with the foundation construction works in order to make the entire construction works faster and avoid any inconveniences.

Observation play Essay

Kiahi a boy of about 3 years old was playing alone stood on a small hill of dirt , at first it looked like her was just looking at the other kids play. When I kept looking at him to see if he was just going to continue to doing nothing, but watch the other children I noticed that he was standing there like a solider tall and with determination on his face. With his hand to his forehead looking about as the other children ran around. After a while I see that he is pointing to his class mates at random and looks to be giving directions, more  like orders, of some sort, although no one is paying attention. After giving off orders in a solider like manner he nods his head, as though satisfied with himself and his team though it was just him playing, and pulls out some kind of black/sliver rectangular key chain object out of his shirt pocket. He clicks on it, as if it had buttons, brings it up to his ear and talks and nods, he’s using it as a cell phone. After he is done he clicks it again to end the call and puts it back to his pocket. Then he just runs off the hill and goes  plays at the play structure, as if what he just did never happened. At first I thought Kiahi was engaging in unoccupied play, because to me it looked as if he was doing nothing at all but just looking at what everyone else was doing. As I kept observing him it looked to him that his was doing solitary play. Playing out a role of someone with authorization giving out orders, and taking calls. It was solitary because no one else was engaging with him in is play even though he pointed out to other kids when giving off orders no one paid him attention. Sophia a girl of about 4 years old with a temperament of a being shy and quite, wasn’t playing with anybody else. She was reluctant to join anybody for play. After a while Sophia looks to have acquired a play mate Elena a soft spoken 3 years old, though in some occasions I did hear her be a little louder towards other kids, they are playing in the sand box. It looks like they are playing kitchen; cooking, serving, cutting and cleaning. Throughout the play not a word was spoken, but they seemed to communicate  in their own silent way. After a while Sophia and Elena moved to play with the balls, when Sophia would turn her back on the ball and it rolled away from her instead of calling out to Sophia to get the ball Elena runs after the ball and gives it back to Sophia in her hands and points to the baskets behind her. In a silent gesture to throw the ball at the basket. I found these girls interesting because I’ve observed them for a while during the morning time when dropped off up until free play outside. I know for a fact that both  girls speak Elena even yells at times when kids don’t pay attention for following the rules. Sophia is new to the pre-school program at Head Start and cries when her Mom, as Ms. Perla informed me, leaves her but just for a few minutes. It takes Sophia a few hours to get into play with actual words being spoken. Elena is a sweet little that separated from her little group of friends to play with Sophia and to me it looked as if Elena understood Sophia not wanting to speak, seeing as Elena ever attempted to say  a single word to her. At first Sophia was engaging in solitary play, playing on her own on the play structure. In the sand box Sophia and Elena cooperative playing, even though they didn’t say a word, the worked together to prepare, cook and serve a meal and clean up after they were done. They had a common goal in playing kitchen. After that they played with the balls which turned to associative play still playing together but without a common goal because Sophia wasn’t as engaged as Elena in trying to play basketball.

The Crisis Escalation Spiral

Seductions or hallucinations with violent C] General over-simulation of vital signs. Increased OR,BP,HRS, Sweating C] Verbal threats or gestures CLC Twitching Al Dilating pupils CLC Replicating words C] Increased volume of speech 0 Increase movements episode spacing, irritation Prolonged eye contact C] Refusal to communicate Questioning/Challenging Information – rational questioning seeking a rational response. Power – authority questions seeking a power struggle or attempt to evade the real issue. Refusal Non-compliance with a direct instruction or expectation (an unreasonable response to a reasonable request).E. G. Are you K? – Why you want to know? This behavior often indicates the beginning of a loss of rational control. Venting Verbal â€Å"acting out† behavior. Release of emotional energy Behavior characterized by yelling swearing, and unfocused or non-specific threatening (I. E. , â€Å"angry at the world†). Threatening/limitation Focused, ta rgeted threat of violence or direct intimidation. This unfocused or non-specific threat has now become Focused on you, another, or property. The risk of physical acting out is high.Physical Acting Out Auscultative and displayed physical behavior is a risk in many crisis situations. Behaviors can include self-harm, damage to property and/or assault towards others or staff Post-Crisis Response In the Post-Crisis Response De-escalation can occur at any point during an interaction with an individual in crisis. Tension reduction will always occur, as the energy output in any crisis cannot be sustained indefinitely. Most communication will be both verbal and non verbal. An individual who is losing rational control ill â€Å"feel† our presence and hear our words.Therefore, we wish to create a Supportive, attentive, engaging presentation towards the individual in crisis or conflict. It is important to use CLC Body language is non-threatening and demonstrates us port and confidence. C LC Personal space is respectful and does not violate the space of the individual in crisis. The need for greater personal space increases as the crisis escalates. C] Eye contact is a soft gaze and projects attentiveness, not invasiveness or threat. CLC Respond to the non-verbal â€Å"cues† of the individual in crisis. Facilities moving out of harms way and prevent harm the person in crisis and to self. 2. Projects confidence and support to co-workers during the crisis. The team intervention leader needs to A. C. T.

Cross-Price Elasticity of Demand

Cross-Price Elasticity of Demand (sometimes called simply Cross Elasticity of Demand) is an expression of the degree to which the demand for one product -- lets call this Product A -- changes when the price of Product B changes. Stated in the abstract, this might seem a little difficult to grasp, but an example or two  makes the concept clear -- its not difficult.   Examples of Cross-Price Elasticity of Demand Assume for a moment youve been lucky enough to get in on the ground floor of the Greek Yogurt craze. Your Greek yogurt product B, is immensely popular, allowing you to increase the single cup price from around $0.90 a cup to $1.50 a cup. Now, in fact, you may continue to do well, but at least some persons will revert back to the good old non-Greek yogurt (Product A) at the $.090/cup price. By changing the price of Product B youve increased the demand for Product A, even though theyre not highly similar products. In fact, they can be quite similar or quite different -- the essential point is that there will often be some correlation, strong, weak or even negative between the demand for one product when the price of another one changes. At other times, there may be no correlation. Substitute Goods The aspirin example shows what happens to the demand for good B when the price of good A increases. Manufacturer As price has increased, demand for its aspirin product (for which there are many substitute goods)  decreases. Since aspirin is so widely available, there probably wont be a great increase in each of these many other brands; however, in instances where there are only a few substitutes, or perhaps only one, the demand increase may be marked. Gasoline vs. electric automobiles is an interesting instance of this. In practice, there really are only a few automobile alternatives: gasoline automobiles, diesel, and electrics. Gasoline and diesel  prices, as youll remember, have been extremely volatile since the late 1980s. As U.S. gasoline prices reached $5/gallon in some West Coast cities, the demand for electric cars increased. However, since 2014 gasoline prices have fallen. With that, demand for electrics fell with them, putting automobile manufacturers in a peculiar bind. They needed to sell electrics to keep their fleet mileage averages down, but consumers began buying gasoline trucks and larger gasoline autos again. This forced manufacturers --Fiat/Dodge  is a case in point -- to lower the price of electrics below their actual production cost in order to keep selling gasoline-powered trucks and muscle cars without triggering a federal government penalty.   Complimentary Goods A local Seattle band has a breakthrough hit -- millions and millions of streams, many, many downloads and a  hundred thousand albums sold, all in a few weeks. The band begins touring and in response to demand, ticket prices begin climbing. But now something interesting happens: as the ticket prices increase, the audience becomes smaller -- no problem so far because whats happening essentially is that the band is playing smaller venues but at greatly increased ticket prices -- still a win. But then, the bands management sees a problem. As the audience grows smaller, so do the sales of all those high mark-up collectibles -- band T-shirts, coffee mugs, photo albums and so on: the  merch. Our Seattle band has more than doubled the ticket price at $60.00 and is still selling about half as many tickets at each venue.  So far so good: 500 tickets times $60.00 is more money than 1,000 tickets times $25.00. However, the band had enjoyed robust merch sales averaging $35 a head. Now the equation looks a little different: 500 tix x $(60.00 $35.00) is less than 1,000 tix x ($25.0035). The drop in ticket sales at a higher price created a proportionate drop in merch sales. The two products are complementary. As the price increases for band tickets, the demand for band merch drops.   The Formula You can calculate the Cross Price Elasticity of Demand (CPoD) as follows: CPEoD (% Change in Quantity Demand for Good A)  Ãƒ · (% Change in Price for Good A)