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    Moodle is an open-source Learning Management System (LMS) that provides educators with the tools and features to create and manage online courses. It allows educators to organize course materials, create quizzes and assignments, host discussion forums, and track student progress. Moodle is highly flexible and can be customized to meet the specific needs of different institutions and learning environments.

    Moodle supports both synchronous and asynchronous learning environments, enabling educators to host live webinars, video conferences, and chat sessions, as well as providing a variety of tools that support self-paced learning, including videos, interactive quizzes, and discussion forums. The platform also integrates with other tools and systems, such as Google Apps and plagiarism detection software, to provide a seamless learning experience.

    Moodle is widely used in educational institutions, including universities, K-12 schools, and corporate training programs. It is well-suited to online and blended learning environments and distance education programs. Additionally, Moodle's accessibility features make it a popular choice for learners with disabilities, ensuring that courses are inclusive and accessible to all learners.

    The Moodle community is an active group of users, developers, and educators who contribute to the platform's development and improvement. The community provides support, resources, and documentation for users, as well as a forum for sharing ideas and best practices. Moodle releases regular updates and improvements, ensuring that the platform remains up-to-date with the latest technologies and best practices.

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Roof structure’ is a term that refers to the construction at the top of a building which typically provides protection from the elements. It generally comprises a system of structural members designed to support the roof build-up – i.e the materials that provide watertightness and thermal and acoustic insulation to the building below.

The term roof structure tends to be associated with pitched or Mansard roofs, and special types of roof such as those made of space frames, trusses, barrel vaults and other structural forms. This sort of roof structure (apart from space frames) will often create a roof space that can be used for various functions, including for living accommodationstorageoffice spaceplant and other uses. Roof spaces so formed are frequently called lofts or attics.

roof structure (sometimes simply called the ‘roof) will often fulfil the functions of:

From a construction point of view, a traditional roof structure can be conceived of as a separate entity to the structure below it. For example, in a house of masonry construction, the roof structure is often a ‘bolt-on’ framework comprising timber purlins and rafters fixed to wall plates which in turn are tied down to the masonry walls. This timber framework not only supports the roof build-up (insulation, coverings etc) but also creates a roof space that can be used for habitation. The roof structure also forms an aesthetic element in its own right.

In normal framed applications, the system of steel or concrete beams is terminated on the underside of the roof build up. There is no separate roof structure as such, only the framing of the top floor beams and columns (supporting the roof build-up) which is considered part of the building’s superstructure. If, however, a Mansard or pitched roof is added, a system of steel (or timbermembers will be used to create the roof structure and with it a new roof space that may have various uses.

Framed buildings may have a variety of construction systems added to the top. In these cases, the roof structure may be formed of a series of trusses, a space framebarrel vaults, braced domes, folded slabs, north lights and tension structures, to name a few. However, most commercial multi-storey buildings have a roof slab that simply supports the roof build-up which provides protection from the weather.

The roof structure may also support walkways and other access equipmentbuilding services plantplantingwater featureslightingwater storage and so on.

Buildings such as concert halls in noisy localities may require special consideration to be given to the design of the roof, with weight and discontinuity of structure necessary to achieve the suitable acoustics. This can make the roof structure design complex and expensive.

Likewise, resistance to the spread of fire will depend on proximity to other buildings, the nature of the building in question and the roof structure itself. Fire protection must prevent the passage of fire from adjacent roofs, while the roof structure must prevent fire spread from its roof space into other parts of the buildingConsiderations such as these can make the design of roof structures very complicated.

AutoCAD is a 3D computer-aided design (CAD) and draughting software developed by Autodesk, Inc. [18]. AutoCAD is used by various architects, project managers and structural engineers, and mechanical engineers. In the latest AutoCAD version, the parametric modeling method is developed, which can find the parametric module easily from the main menu of AutoCAD.

Workshop safety

Look around your workshop

  • Is the work area as free from hazards as possible?
  • Is the area equipped to handle emergency situations; for example, with fire extinguishers, properly equipped first aid kits?
  • Is the workshop managed to keep it safe?
  • Are tools and equipment properly guarded?
  • Do workers use tools and equipment in a safe manner?
  • Do workers use appropriate personal protective equipment?

Safety precautions

  • Read the operator’s manual and observe all safety precautions for all equipment.
  • Protect yourself from electric shock. Check power tools before use. Fit a residual current device (RCD or safety switch) to the electrical circuit to prevent electrical shock or electrocution. If an RCD is not fitted, use a portable RCD.
  • Keep all guards and shields in place.
  • Give the task your full attention.
  • Let each tool work at its own speed; do not force it.
  • Always wear appropriate personal protective clothing.
  • Maintain secure footing and balance at all times.
  • Keep tools clean and sharp.
  • Turn the switch off immediately if the power tool stalls or jams.
  • Wherever possible, use clamps or a vice to hold your work.
  • Provide enough light so you can see what you are doing.
  • Store power tools safely to prevent damage to the tool and cord, and to prevent unauthorised use.
  • Maintain power tools in good working order. Replace or repair worn or faulty equipment immediately.

Workshop safety

Look around your workshop

  • Is the work area as free from hazards as possible?
  • Is the area equipped to handle emergency situations; for example, with fire extinguishers, properly equipped first aid kits?
  • Is the workshop managed to keep it safe?
  • Are tools and equipment properly guarded?
  • Do workers use tools and equipment in a safe manner?
  • Do workers use appropriate personal protective equipment?

Safety precautions

  • Read the operator’s manual and observe all safety precautions for all equipment.
  • Protect yourself from electric shock. Check power tools before use. Fit a residual current device (RCD or safety switch) to the electrical circuit to prevent electrical shock or electrocution. If an RCD is not fitted, use a portable RCD.
  • Keep all guards and shields in place.
  • Give the task your full attention.
  • Let each tool work at its own speed; do not force it.
  • Always wear appropriate personal protective clothing.
  • Maintain secure footing and balance at all times.
  • Keep tools clean and sharp.
  • Turn the switch off immediately if the power tool stalls or jams.
  • Wherever possible, use clamps or a vice to hold your work.
  • Provide enough light so you can see what you are doing.
  • Store power tools safely to prevent damage to the tool and cord, and to prevent unauthorised use.
  • Maintain power tools in good working order. Replace or repair worn or faulty equipment immediately.

Hand tools

The main causes of injury with hand tools include:

  • using the wrong tool
  • using a tool in poor condition
  • using a tool the wrong way
  • keeping tools in unsafe places.

So prevent injury by following these safe practices when using tools.

  • Use tools of an appropriate size and shape for the job.
  • Wipe oil, grease and dirt from tools with a clean rag before starting a job.
  • Clean tools and keep in trays or boxes when not in use.
  • Shut off machines before adjusting them.
  • Wear safety glasses when using punches, chisels, hammers or grinding devices.
  • Use safety equipment when removing and installing heavy parts.
  • Hold safety meetings to teach workers about the care and safe use of tools.
  • Keep a first aid kit and a doctor’s name, address and phone number handy for emergencies.
  • Don’t use homemade or re-worked tools, or tools not designed for the job.
  • Don’t use pipe extensions or other ‘cheaters’ or wrenches too light for the job.
  • Don’t place tools where they can fall and strike someone.
  • Don’t carry pointed or sharp tools in your pockets.
  • Don’t throw tools — hand them. Use a rope or cord to raise or lower tools and equipment.

Wrenches

  • Always pull on a wrench, never push.
  • Always face wrench jaw openings in direction of pull.
  • When pulling on a wrench, brace against a backward fall by placing one foot behind the other.
  • Inspect ratchet wrenches periodically and replace worn or defective parts.
  • Keep moving parts of adjustable wrenches clean and lubricated.
  • Don’t try to work with a wrench in a cocked position.
  • Use angle connections so that the wrench will fit flat and square on the nut or bolt head.
  • Don’t use wrenches with spread-out jaw openings or sockets with battered or rounded walls.
  • Don’t use a wrench as a hammer.
  • Don’t pound on a wrench to loosen a frozen nut; use penetrating oil, a heavier wrench or one designed for impact work.

Screwdrivers

  • Use the right length screwdriver so that it can be applied at right angles to the screw head.
  • Use the largest-sized screwdriver that will fit snugly into the screw slot.
  • Use a screwdriver with an insulated handle for electrical work.
  • Don’t use a screwdriver with a worn or broken tip.
  • Don’t use a screwdriver as a punch, chisel or pry-bar.
  • Don’t hold a small part in your hand while working on it with a screwdriver — put it into a vice.

Pliers

  • Point the inside of plier cutting jaws away from your face to prevent injury from flying cuttings.
  • Don’t use pliers with smoothly worn gripping sections or with loose rivets or nut and bolt assemblies.
  • Don’t use pliers for bolt turning — they are designed for gripping and cutting only.
  • Don’t overload cutting pliers. If wire can’t be cut with one hand squeezing pliers, use a larger pair of pliers.
  • Check the insulation on pliers — a pin hole can be fatal.

Chisels and punches

  • Use a chisel with a cutting edge of the same width or wider than the area to be cut.
  • Use the largest punch to fit the job without binding.
  • Hold chisels and punches loosely with the palm up, or use a tool holder.
  • Don’t use chisels and punches with ‘mushroomed’ heads — metal may chip off and cause injury.
  • Don’t use a chisel, punch or pry bar to remove gears, wheels or bearings from a shaft — use a pulling tool.

Hammers

  • Use a hammer heavy enough for the job.
  • Don’t use a hammer with a cracked head or handle.
  • Don’t use a hammer with a ‘mushroomed’ or battered and rounded striking face.
  • When spalling rock with a heavy hammer, wear eye protection.