Wednesday, April 23, 2014

10 scaffold safety essentials

A lot can go wrong when working on scaffolding. We talked to safety experts about some safety essentials when working from heights. Here are your top 10 tips for scaffolding safety.

On Christmas Eve 2009, four migrant workers fell to their death from a suspended scaffold 13 storeys high after the platform they were standing on snapped. A fifth worker suffered severe injuries. The incident resulted in both criminal and OHS charges being filed against three men and Metron Construction Corp.

Despite the dangers it poses, however, working on a scaffold can be straightforward and safe if everyone involved follows procedures.

Provincial and federal occupational safety laws outline specific duties and responsibilities for employers, supervisors and workers. Knowing the rules and regulations is in everyone’s best interest.

1. Ensure everyone is properly trained. Safety regulations require that workers be trained in the design and operation of scaffolding. Training covers important safe work practices such as how to safely get on and off the scaffold (using an access ladder, not the scaffold frame — unless it is specially designed to be climbed and both hands are free to grab the rungs). It should also cover comprehensive fall protection training specific to the type of scaffolding, erecting and dismantling procedures for anyone involved in these activities, and a host of other lifesaving details.

 2. Take the time for prep work. Before using scaffolding, make sure the base is sound, level and adjusted; that the legs are plumb and all braces in place; that locking devices and ties are secured; that cross members are level; and that planks, decks and guardrails are installed and secure. Check the location for ground conditions, such as slopes, and stay clear away from hazards such as overhead wires, obstructions and changes in surface elevation.

3. Keep it legal. CSA standard committees have identified “rogue employers” as a significant obstacle to scaffold safety. “These are employers who fly under the radar and operate without a license,” says Jeet Tulshi, a CSA project manager. “They get some pick-up truck, rent a unit and hope they don’t get caught. They might import material from offshore and put it together without having it surveyed or reviewed by a professional engineer.” That was the case on Christmas Eve 2009, he says.

4. Know and respect the load capacity.  According to the Ontario Ministry of Labour, failure to consider all the loads to which the scaffold may be subjected is one of the top things that go wrong at the design stage. The scaffold must be strong enough and capable of holding the desired weight, otherwise it could collapse. Don’t try to fit more workers on the platform than it can handle; don’t overload it with equipment and materials; and don’t rest anything on the guardrails.

 5. Ensure the scaffold is properly secured. The scaffold must be adequately braced or tied to the building. If it is wrapped in a tarp for protection from the elements, it could blow over if it isn’t secured. According to the Construction Safety Association of Manitoba, “Bracing must be properly secured in place, otherwise scaffold movement may dislodge an end, reducing the stability of the scaffold. There are several different brace retention or locking systems found on scaffolds. These devices must operate freely for ease of assembly and dismantling, and also lock securely to prevent a brace from dislodging. Nails and other miscellaneous odds and ends should not be used in place of proper retention parts supplied by the manufacturer.”

6. Use guardrails. The design of the scaffold must incorporate guardrails on at least the three sides facing away from the building if the scaffold is more than 10 feet above ground. There should be a top rail, a mid rail and a bottom rail (toe board). If you must remove any guardrails while hoisting materials, replace them promptly. Wear fall protection at all times.

7. Inspect and maintain. Scaffolding must be routinely inspected by the supervisor and by a competent person — ideally a professional engineer or a person designated in writing by a professional engineer. In the case of a suspended platform, inspect and test all components including welds, stirrups, connecting pins, connecting plates, trusses, beams and working surface. Check that the lumber is of good quality. If any pieces get broken or damaged, replace them right away. Inspect frames, braces and other components for damage, bends and excessive rust or wear. Also check motors, platforms or wire ropes for damage from chemicals or corrosive material.

8. Good housekeeping. There isn’t much room on a scaffold, so it’s important to store tools and materials in an orderly fashion. Keep the platform free of obstructions. Place debris and waste material in a container or remove it from the platform immediately.

9. Keep your balance. A scaffold and its platform must be perfectly level (CSA standard says it mustn’t deviate from the vertical by more than 12 millimeters per three meters of height) to minimize the risk of workers losing balance and falling off. Particularly on swing stages, there must be an adequately weighted counterweight. Pay attention when working on a scaffold. Any sudden movements, or reaching too far from the platform, can cause a loss of balance.

10. Use appropriate PPE. This includes head protection, non-slip protective footwear and fall protection as required, in the form of a safety harness tied off to a solid structure, such as the building.

With all of these safety practices in place, working on a scaffold can be a high without the dangerous lows.

Article Credit - Michelle Morra is an award-winning freelance journalist based in Toronto. You may contact Michelle at writemorr@yahoo.ca

Thursday, April 17, 2014

Tips for Designing Better Fences

Steve Maxwell, Casa Guru’s home improvement expert, tells you everything you always wanted to know about designing the "ultimate" fence (but were afraid to ask).


In at least one way, wooden residential fences are like most other home improvement projects. The more you put into design and construction details, the more you get back. If you’d like a distinctive, beautiful and long lasting fence then click through our gallery of design tips.

Style...
Great fences can look quite different from one another, yet they have one thing in common. Even though they're typically made from standard construction lumber, they don't look like it.  

And this visual trick springs from tasteful application of details like curves, trim and post caps. Think of your fence as a permanently rooted piece of furniture for your lawn and you'll get the picture.

Plan Ahead! 
You’ve got to be a very experienced fence builder to improvise a beautiful design on site. That's why you need to sit down with a pad of graph paper or a graphics program on your PC and settle on details using scale drawings.

The greatest advantage of having a well-formulated plan is the piece of mind it brings. If your fence looks good on paper, you can build with confidence.

Start by deciding on the big things such as fence height as well as post height and spacing. After these are settled then refine your ideas for post designs, picket shape and gate styles.

Premium Visual Details

Consider the following visual details when planning the fence:

One of the best places to add visual detail is on corner posts and posts flanking gates.  Many traditional cabinet-making details, like flutes, crown mouldings and caps, can be applied here, helping vault your fence to premium status.  Even if you do nothing else, the tops of posts absolutely demand attention. You just can't leave them cut off square. One simple, yet elegant approach is the pyramid top. Four angled cuts, 25 degrees from square, converging at a centre point makes an attractive finale.

The sliding compound mitre saw is an ideal tool for cutting these facets, but you'll still need to fine-tune the cuts with a belt sander.

Check out  Garden Structure for more online ideas on fence, gazebo and arbour plans. Another valubale design source is the book Wooden Fences  by George Nash.


Fastening Rails to Posts

As you decide on fence design, there comes a point when horizontal rails must fasten to the vertical posts you've installed.

The quick-and-dirty approach to this challenge involves toenailing the rails in place or securing them to posts with metal clips. 

An elegant alternative uses routed pockets that surround the ends of the rails and hold them in place. A shop-built plywood routing pattern makes quick work of this operation.


Source: Readers Digest - http://www.readersdigest.ca/home-garden/home-improvement/4-tips-designing-better-fences