Bob Rankin

Bob Rankin joins Total Construction Rentals as V.P. of Operations

We are pleased to announce that Bob Rankin has joined our team as V.P. of Operations! Bob has worked with most of our clients for well over a decade. He has been instrumental in the successful design and implementation of thousands of temporary heating, cooling, and dehumidification projects. Bob has and will continue to provide solid guidance to our clients with all types and sizes of climate control projects.

Rest assured that if you’ve worked with Bob in the past, he will continue to be your first and best source of climate control expertise. If you haven’t worked with Bob previously, you can be certain that you’ll receive excellent guidance that will keep your projects on schedule and within budget.

Bob’s responsibilities for 2015-2016 will be to manage our sales team as well as handle temporary climate control for PA and DE.

Total Construction Rentals and Bob Rankin look forward to working with you and your company! Bob’s contact information can be found below.

As always, you and your company are very important so whatever you need — consider it done!

Sincerely,
Bob Rankin

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How Good Are Your Project Management Skills?

Test your project management skills

Project managers need a broad range of skills.

Whether or not you hold the official title of project manager, chances are you’ll be called upon to lead some sort of project at some time.

From initiating a procedural change in your department to opening a branch office in a different city, projects come in all shapes and sizes.

As the complexity of your projects increases, the number of details you have to monitor also increases.

However, the fundamentals of managing a project from start to finish are usually very similar.

This short quiz helps you determine how well you perform in the eight key areas that are important to a successful project. The quiz is aimed at people who manage projects of a significant size, but who are not full-time project managers. However, everyone can use their answers to make sure they’re applying best practices.

How Good Are Your Project Management Skills?

Instructions

For each statement, click the button in the column that best describes you. Please answer questions as you actually are (rather than how you think you should be), and don’t worry if some questions seem to score in the ‘wrong direction’. When you are finished, please click the ‘Calculate My Total’ button at the bottom of the test.

Original Source / Quiz: http://www.mindtools.com/pages/article/newPPM_60.htm

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Cold Weather Masonry Construction

Cold Weather Masonry Construction

Two options provided for contractors under the code are protecting the mortar mixing area and heating mortar ingredients.
In the wintertime, the magic number is 40 degrees Fahrenheit, and few places in the continental U.S. escape experiencing it. According to the Masonry Standards Joint Committee (MSJC) Code and Specification Quality Assurance section and the International Building Code 2003 Chapter 21, when temperatures fall below this magic number — at which time hydration of cement slows or even stops — it signals the point to implement a cold weather masonry construction plan.

This temperature is also the point when good mason contractors implement their best quality control efforts. While modern technology has extended the building season to nearly year-round in most places, the magic number hasn’t changed, largely because the basic properties of mortar materials and masonry units remain relatively constant.

Masonry construction has come a long way since the 1920s, when the late Axel Ohman was setting stone on Minneapolis’ first skyscraper, the Foshay Tower. Mark Peschel, now an owner of the firm Ohman founded, recalls him describing that the only way to keep the masons and the masonry from freezing was to build bonfires below the scaffolding and then hope that the rising heat would keep them warm enough. When it got too cold for that strategy, Ohman went back to Norway and waited for spring.

Fortunately, today’s mason contractor doesn’t have to wait for warmer weather. Season-extending techniques can be as simple as heating the mortar ingredients and storing units in a protected enclosure or as sophisticated as completely enclosing the construction area in poly-draped scaffolding, pumping in heat from propane heaters, or using specially-blended ingredients. But the goals, even after more than 75 years, are the same: keep the masons and units from freezing and keep the mortar above the magic number of 40 degrees.

Codes and Technology

Some of the techniques to protect both masons and masonry materials come from either codes or technology.

Code options are designed to address the varying job site conditions and extremes experienced, thus providing flexibility for the contractor, building official and special inspector. Still, the parameters around the options are prescriptive. Between given temperatures, there are options to assure the structural integrity of the masonry, but the contractor must describe his or her approach in a plan. The crucial choice of method affects both the internal quality control program and the project-specific quality assurance plan.

For example, the code requires windbreaks with winds above 15 mph and temperatures below 25 degrees. Dan Schiffer, president of Schiffer Mason Contractors, Inc. of Holt, Mich., utilized an innovative windbreak plan when his company needed to protect its mortar-mixing area for a large project. Part of his plan involved lining up construction trailers as windbreaks on each side of the mortar mixing area, thus partially enclosing it. This allowed the space in between to serve as a virtual mortar-mixing assembly line, reducing the time from mixer to boards and aiding heat rentention of the mortar.

Cold Weather Masonry Construction

Keeping materials off of the ground and covered is required, as shown in this picture of the staging and delivery process for this corporate headquarters built by McGough Construction Company, Inc. of St. Paul, Minn.
Technology offers other winter weather options. Today’s larger LP gas heaters, with more powerful blowers, enable 24-hour heating of enclosures. To conserve as much heat as possible, some scaffold rental companies provide newer poly enclosures that fit their scaffold systems more tightly than site-adapted systems.

Miron Construction of Neenah, Wisc., uses heated enclosures with a unique heat-delivery method: a perforated fabric tube running under the scaffolding, carrying heated air from the blower down the length of the scaffold.

Another technological advancement is the fact that contractors today can access far better weather information. Many subscribe to services that provide them with up-to-the-minute weather data with the click of a mouse, while others have local weather service phone numbers on speed-dial. Either option provides information on “ambient” temperatures (e.g., right now) and “mean daily” temperatures (e.g., the average of the highest and lowest temperatures during a 24-hour period).

Tricks of the Trade

Another way to beat Old Man Winter is to utilize bulk-delivered dry mortar ingredients, which avoids the potential for uneven heating and scorching caused when trying to thaw a pile of damp sand. Using dry ingredients “is one of the best techniques developed for modern winter masonry construction,” says Mike Cook, vice president of Bricklayers and Allied Craftworkers (BAC) Local 1 MN/ND and former supervisor at Gresser Concrete Masonry of Eagan, Minn.

Combining dry, unfrozen ingredients with heated water achieves a higher mortar temperature. In fact, heated water may be the most important ingredient, given water’s capacity to retain heat and impart it to the other ingredients.

In addition, the heat from hydrating the cement brings a small temperature rise in the plastic mortar. While not a significant increase, given the relatively small volume and large area of mortar joints, it may be just enough when combined with other techniques to make a real difference. As the heated water begins hydrating the cement, the temperature rise is cumulative before leveling off, which provides some extra time before cooling begins.

Another option is to use Type III (quick-setting) cement, which increases available heat even further, or one of the varieties of available admixtures, which can accelerate mortar setting. Keep in mind, the design professional of record must approve the use of such admixtures since some can be damaging to the masonry or to imbedded metal. This is especially true of those containing chlorides.

Finally, instead of straw, contractors can now use insulating blankets, electric blankets or heat lamps to retain the heat of cement hydration for extended periods.

Keep Units Toasty, Not Torched

Frozen units, or those with visible ice or snow, must not be used. A frozen unit is defined as one with a measured temperature of 20 degrees or less — a unit’s temperature can be accurately determined by using flat, instant-read thermometers.

Rather than leaving units out in the elements, a better solution is if units can be stored in the dry, heated scaffold enclosure. This option forgoes the need for “torching” them, which increases the risk of thermal shock and cracking.

Skilled contractors who can accurately predict the number of units needed in a given period of time know the value of moving just the right number of units from outdoor, covered storage into the building’s heated enclosure for just-in-time delivery to the scaffold.

For example, when necessary, Fred Kinateder Masonry, Inc. of Waukesha, Wisc., heats the masonry units in a separate metal enclosure outside the cramped, enclosed work area and delivers them pre-warmed to the scaffold. The rented enclosure can hold up to 7,000 brick at once, and a forklift with a long reach can access the cubes from either end.

Using heated, fully dry units along with the techniques listed earlier provides for maximum heat retention.

Grouted Masonry

You’ve protected your materials, kept them warm and dry, and your masons — who are also protected from the weather — are laying up units easily because you’ve taken the necessary precautions for the winter temperatures. However, your job is not over yet.

Cold Weather Masonry Construction

Under extreme conditions, using either heated partial or complete enclosures may be the answer to assuring quality.
After your walls start going up, it is important to keep the newly laid masonry — especially grouted masonry — from freezing until the grout has reached initial set, the units have absorbed most of the water, and the related risk of freezing is diminished.

The MSJC requirement is to keep masonry walls maintained above 32 degrees for 24 hours after completing ungrouted masonry and 48 hours for grouted masonry (unless only Type III cement is used). This protected time is required so the compressive and/or flexural bond strength of the masonry is not compromised. Also, mortar can also lose much of its compressive strength if frozen before initial set, and frozen grout can crack units. However, mortar and grout may recover somewhat if it warms up enough for the cement to hydrate.

Have a Plan Established

Planning is the key to success of any method. Code requires having a plan if construction site temperatures will fall below 40 degrees or if the temperature of the units or completed masonry waiting for grout could fall below that point. As anyone involved in masonry construction knows, unanticipated delays can change schedules significantly. In fact, even if no plan has been submitted, once the magic number is reached, the code requirements are triggered. That’s when expecting the unexpected can mean the difference between a project on schedule and on budget and one that’s not.

Modern technology has extended masonry construction through the coldest seasons, but it comes with a price. Building in cold weather is costly, given fuel, additional equipment, enclosure structures, extra planning time and other factors. Some mason contractors estimate a premium somewhere between 10-20% more than “normal” weather construction, and the well-prepared bid accordingly.

Still, all winter construction requires special treatment and techniques, and when a tight schedule is important, the masonry premium may not seem too significant. Mason contractors and crews who are experienced and prepared can minimize these costs and protect tight schedules with innovative ideas that assure the integrity of the masonry and the safety of the craftworkers.

Original Source: http://www.masonrymagazine.com/10-05/cold.html

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Avoiding Winter-Related Job Problems

As daylight hours grow shorter and evening temperatures turn cooler, it would serve us well to examine some of the job problems that may result from winter installation of gypsum board. Some of these problems may include: joint compound bond failures, delayed shrinkage, beading, nail popping, joint shadowing and sagging gypsum board. Cold and damp winter weather conditions are often a major or contributing cause to these problems all-too-familiar to the veteran drywaller.

In order to minimize these problems it is recommended that a minimum room temperature of not less than 40° F (4° C) be maintained during the application of gypsum board, except when adhesive is used for the attachment of gypsum board. For the bonding of adhesive, joint treatment, texturing and decoration, the room temperature shall be maintained at a minimum 50° F (10° C) for 48 hours prior to application and continuously thereafter until completely dry.

It is critical to maintain adequate ventilation in the working area during the installation and curing period. When using a temporary heat source, the temperature shall not exceed 95° F (35° C) in any given room or area.

Previous applications of finish materials must be completely dry before making additional application of finish materials or beginning texturing. Protect ready-mixed joint compound and textures from freezing during storage.

When installing a ceiling to be textured with a water based texture, use 5/8-inch gypsum wallboard or a specially formulated 1/2-inch High Strength ceiling board when framing exceeds 16 inches o.c. in order to avoid sagging.

Where a vapor retarder is required, use foil-backed gypsum board, vapor retarder faced mineral wool or faced-glass fiber insulation batts. When a polyethylene vapor retarder film is installed on ceilings behind gypsum board it is important to install the ceiling insulation before the gypsum board. Failure to utilize this procedure can result in moisture condensation on the backside of the gypsum board, which will cause the board to sag.

A special maximum joint strength drywall system such as the Gold Bond Sta-Smooth System reduces beading or ridging. The combination of Gold Bond Sta-Smooth gypsum board, with its unique tapered-beveled edge or round-edge configuration, and Sta-Smooth Joint Compound, relieves joint deformity problems caused by twisted framing, damaged wallboard edges, poor alignment and extremes in humidity and temperature.

The Sta-Smooth joint shape and the joint compound are developed to provide greater mass and integral bond for increased strength. Sta-Smooth Joint Compound, a “hardening” or “setting” compound, adds considerable strength that is unaffected by the amount of moisture normally introduced into a structure that could cause ridging or beading with conventional drying compounds.

Following these procedures during cold and damp weather periods will significantly reduce the incidence of winter job problems.

Original Source: http://nationalgypsum.com/resources/tech-talk-winterize.htm