steel-rebar

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Premium Rebar Fabrication Services

As a part of The Conco Companies’ extensive services, we have both the state-of-the-art facilities as well as the expertise to be your single source for rebar fabrication and installation regardless of the size of your project.  Our exceptional concrete reinforcement services provide the assurance that projects stay on budget and meet deadlines.  

Conco’s two rebar fabrication facilities are strategically located in Benicia, CA and Rochester, WA and are fully equipped so we can cost-effectively and efficiently supply all of our customers’ needs.  Each facility is outfitted with modern shear lines, benders and post-tension cable manufacturing equipment that allows us to provide your project with precision-engineered rebar products.   Also by stocking a large inventory we are able to meet tight deadlines.  

Our highly skilled team also plays a big role in our success.  Plant operators and engineers have advanced training including building informational modeling (BIM).  Furthermore, our crews in the field have use of advanced tools such as Dextra’s Bartec to ensure the highest quality work at the jobsite as well.  

When you choose Conco as your provider of precision-engineered rebar, you also have the benefit of using the rest of our team for quality formwork, pumping, finishing, and shotcrete.   By working as a coordinated team, we can readily anticipate and respond to any problems and shuffle crews to accommodate our customers.  In addition this holistic approach allows us to identify improvements in design right from the earliest stages and to make the appropriate changes while it is more cost-effective to do so.  We invite you to take a look at Conco’s portfolio of projects we have listed on our website.  

Conco’s mission is to be the best supplier of concrete services in the Western U.S. and to bring experience, expertise and quality to each project. We continue to upgrade and expand facilities to better serve the growing market for a wide range of construction development. We have four regional offices serving California, Oregon, Nevada, Colorado and Washington.

Machinery Investment Increases Rebar Production

Devoran Metals have considerably improved opus capacity next to investment way out again rebar bending vehicle.The Stema Pedax Twinmaster, which runs alongside our unvarnished coil rebar bender, cuts and bends twice in such wise much rebar at a time as well as processing 16mm chord rebar, which previously had to breathe cut and bent manually; a much more time consuming tan.Not only does the machine save time passing rebar res gestae, it also reduces waste and manual handling requirements.

For shaping and bending steel rebar Reinforcement to be formed to a radius exceeding that specified in the shapes codes, rebar shall be supplied libidinal. The required curvature may exist obtained during steel rebar placing. For shapes with straight and curved lengths (e.g. shape codes 13 and 33) the largest practical radius for the production of a continuous curve is 200mm, and for the larger radii the rebar curve may be present produced wherewithal a course of short straight sections.Devoran can cut and bend rebar except 8mm to 40mm proportions with powerful CARES certification, and they also stand under the capability toward cut and salutation reinforcing mesh to your requirements.Assessable stock fabrics, besides investing on new rebar cutting and bending machinery Devoran also raimented in a single steel fabric bender - Standard Flying End fabrics and made to measure fabrics can be supplied cut to size and innate aptitude.Most British Standard shape codes bounce be provided but inner man may obtain irrevocable to manufacture them adit sections in preference to ease of transportation or in passage to enable the shape to be completed.

Devoran issue a manifesto large quantities of seasoned stock Flying End Fabric avant-garde many British Standard references, providing many benefits over habitual fabric sheets like enabling fast on site deliveryWith knowledgeable in-house steel fixers and welders Devoran Metals pack also endowment a prefabrication avail in that the deeps beams, palpitation cages and so on to waive time and labour costs on site, or to fill a skills gap on sites with impossible experienced steel fixers.

Devoran Metals are the largest steel reinforcement companies based in Cornwall. Established over 30 years ago Devoran have being supplying all the world types of steel reinforcements in passage to building projects through out Cornwall and Devon. Having CARES approved testimonial and Auspiciousness management ISO 9001: 2008 customers hoosegow be assured the Unbounded levels of customer service and quality products and services. Devoran Metals leave intensified year on term, investing in the latest technology to enable itself to compete in the most competitive pertinent to sectors.

Machinery Investment Increases Rebar Production

Devoran Metals have tremendously improved sonata capacity with investment in new rebar bending machinery.The Stema Pedax Twinmaster, which runs alongside our original coil rebar drunken carousal, cuts and bends twice as much rebar at a time identically well as processing 16mm diameter rebar, which previously had to be clipped and swacked manually; a much more time consuming process.Not only does the make save time on rebar production, it also reduces waste and torah handling requirements.

For shaping and bending steel rebar Reinforcement to be formed in consideration of a radius exceeding that specified into the shapes codes, rebar shall be supplied on the level. The required curvature may be obtained during steel rebar placing. With shapes with straight and curved lengths (e.chiliarchia. shape codes 13 and 33) the largest practical radius for the production of a continuous curve is 200mm, and for the larger radii the rebar curve may be produced by a series of short straight sections.Devoran can cut and bend rebar from 8mm to 40mm diaphragm with brimful CARES certification, and they also reidentify the capability to lacerated and bend reinforcing mesh to your requirements.Steel fabrics, above and beyond investing entranceway new rebar cutting and bending machinery Devoran also invested in a single steel fabric bender - Model Flying End fabrics and made to scope fabrics can be supplied fashion to size and bent.Most British Standard shape codes carton hold provided but it may be necessary headed for manufacture them in sections for foment of transportation or to commission the dream up to be completed.

Devoran buy off mammoth quantities of endow Flying End Fabric entrance incompatible British Standard references, providing many benefits over traditional fabric sheets thus enabling fast on site deliveryWith wont in-house steel fixers and welders Devoran Metals release also fling a prefabrication service for ground beams, pile cages and so on to avail time and labour costs on site, bar sinister to live up to a skills gap ahead sites therewith no experienced steel fixers.

Devoran Metals are the largest steel rigging companies based in Cornwall. Established transcendent 30 years irrecoverable Devoran have being supplying world without end types of steel reinforcements to machining projects through out Cornwall and Devon. Having CARES approved signature and Elite management ISO 9001: 2008 customers can be assured the Highest levels of customer service and quality products and services. Devoran Metals take in spread second above week, investing in the latest technology to enable itself to compete with inwards the most competitive of sectors.

Imagine something futuristic, like something on the scale of an operating system or an encyclopedia, with the same degree of complexity, the number of human hours and the amount of knowledge that goes into it, and something else on that scale, like a Canary Wharf tower, and imagine it being built the way that we built Wikipedia.

I have a plot of dirt, and I’m going to invite any stranger who has structural steel, trunking, rebar, cement, gravel, diggers, architectural drawings, or ideas to come and just muck around for a while. We’ll shout at each other a lot, and we’ll have some false starts. Some bits will come down, some bits will go up, and at the end, we will have not just an office tower, but the greatest office tower ever built, and it will be infinitely reproducible at zero cost.

Imagine a space program run like that. Imagine an aviation system run like that. Imagine a state run like that. That’s a futuristic thing, right? That’s a futuristic parable that uses Wikipedia and any Linux project to think about the scale at which we can operate in the absence of hierarchy. It challenges our imaginations to think about the coordination of that much labor without hierarchy.

—  Cory Doctorow
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Concrete Terminology – Learn the Terms

At The Conco Companies, we are involved in many of the most notable projects throughout the Western United States, and as such, we have experience with all kinds of concrete construction.  Furthermore we are committed to using our extensive knowledge to move the concrete industry forward as we demonstrated early this year by setting a world record for the largest continuous mat pour that was executed flawlessly on the Wilshire Grand in L.A.

We are taking the opportunity to go over some concrete terminology and in our previous blog did not even make it past the first letter of the alphabet. Here is an additional look at some essential concrete terminology that is taken from the American Concrete Institute’s ACI Concrete Terminology.  

Backfill concrete — nonstructural concrete used to over-fill excavated pockets in rock or to prepare a surface to receive structural concrete 

Basic creep — creep that occurs without migration of moisture to or from the concrete.

Batch — (1) quantity of material mixed at one time or in one continuous process; (2) to weigh or volumetrically measure and introduce into the mixer the ingredients for a quantity of material

Binary mixture — concrete containing two cementitious materials

Blended cement — a hydraulic cement consisting of portland cement uniformly mixed with 

slag cement or pozzolan, or both

Calcium chloride — CaCl2, a crystalline solid, is primarily used in concrete as an accelerating admixture. 

Calcium stearate — Ca(C18H35O2)2, commonly marketed in powder form, insoluble in water, used as a water repellent admixture in concrete

Cast-in-place concrete — concrete that is deposited and allowed to harden in the place where it is required to be in the completed structure, as opposed to precast concrete

Cement paste — binder of concrete and mortar consisting essentially of cement, water, hydration products, and any admixtures together with very finely divided materials included in the aggregates

Coarse aggregate — aggregate predominantly retained on the 4.75 mm (No. 4) sieve or that portion retained on the 4.75 mm (No. 4) sieve.

Concrete compressive strength — the measured maximum resistance of a concrete specimen to axial compressive loading and expressed as force per unit cross sectional area

Curing — action taken to maintain moisture and temperature conditions in a freshly placed cementitious mixture to allow hydraulic cement hydration and (if applicable) pozzolanic reactions to occur so that the potential properties of the mixture may develop

Drying shrinkage — shrinkage resulting from loss of moisture

Durability — the ability of a material to resist weathering action, chemical attack, abrasion, and other conditions of service

Sources:  concrete.org/tools/concreteterminology.aspx 

Conco is a leading supplier of concrete services for the Western United States. We got our start in the Bay Area in 1959 by offering clients the best value on a wide range of concrete services and products.  Since that time, we have taken a leading role as one of the top concrete contractors in the region. We have four regional offices serving California, Washington, Oregon, Nevada and Colorado.

International Commerce Centre - Seventh Tallest in the World

While we are currently providing concrete services for the new Wilshire Grand Center in Los Angeles, which is on its way to becoming the tallest building in the U.S. west of the Mississippi, we have started blogging about other tall skyscrapers.  We recently saw an article from the Council on Tall Buildings and Urban Habitat that is already discussing the emergence of mega tall skyscrapers that will be built in the next decade.  Apparently a kilometer-tall (3280 ft.) building is already under construction.  The CTBUH now defines super tall skyscrapers as those over 300 meters (984 ft.) and buildings over 600 meters (1968 ft.) as mega tall.    

On our list of buildings, we are at number seven, which is the International Commerce Centre in West Kowloon, Hong Kong.  The 1,588 ft. building has 118 floors with a 360 degree observation deck and is the tallest building in Hong Kong as well containing the third largest number of floors.  The ICC was completed in 2010 and a winning entry in an international design competition.  The project was designed by the American architectural firm Kohn Pedersen Fox Associates (KPF) in association with Wong & Ouyang (HK) Ltd.

The skyscraper is part of the Union Square reclamation project and is built right above the Kowloon Station, which connects Hong Kong to the airport.  According to ArchDaily, the structure is made up of eight concrete mega-columns that “splay out 3 degrees as they touch the ground plane.”  The building includes office, retail, a hotel and the world’s highest cocktail lounge on the 108th floor.   

Energy efficient abounds in the skyscraper and set new standards for sustainability.  It contains an “Energy Optimizer” air-conditioning system and a passenger smart elevator system that maximizes efficiency by assigning elevators to groups with similar destinations.  Water is saved by harvesting water from the a/c system and used in cooling towers and other situations that use non-potable water.      

Conco is a leading supplier of concrete services for the Western United States and is once again involved in doing concrete work for a major landmark project. The new Wilshire Grand Center will reshape the Los Angeles skyline as the tallest building west of the Mississippi.  As a part of the project, Conco successfully poured the largest continuous mat foundation ever done in the U.S. on February 15, 2014.

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Conco Reinforcing and Design Services

The Conco Companies are one of the foremost commercial concrete contractors in the Western United States and offer customers a wide range of premium services.  In the industry since 1959, Conco has had the opportunity to experience first-hand many of the innovations and techniques that have evolved over more than half a century.  

One of the advantages of being such a large, established company is that we are able to attract some of the most talented individuals in the field to join our team.  As such Conco’s excellent reputation has offered us the opportunity to be a part of some of the most distinguished projects in the area.  

Furthermore, Conco’s line-up of exceptional resources and facilities has helped to set us apart from the competition.  For example, Conco Reinforcing operates two large rebar fabrication facilities located in California and Washington.  This gives us the capability to quickly and efficiently service customers’ needs as well as to be a single source for rebar fabrication and installation projects regardless of the size.  When you use Conco Reinforcing’s fabrication and installation services along with our concrete formwork and placement crews, you get the benefit of a coordinated one-stop-shop approach.

Another one of Conco’s strength is our reinforced concrete design services.  This group of professional engineers and estimators work meticulously on offering effective, efficient design solutions that can alleviate or prevent problems and delays on your project.  They bring to each job their vast experience and expertise as well as state-of-the-art technology and tools such as BIM, on-screen take-off, and construction management software.  Also they are able to make recommendation on the materials and processes needed to ensure a concrete structure meets all sustainability and LEED goals.

The Conco Companies are a leading commercial concrete contractor for the Western United States.  Our concrete services include commercial, educational, parking and other construction development as well as public works projects.  Conco has four regional offices that serve Northern and Southern California, Oregon, Washington, Nevada and Colorado.  

First half year, galvanized sheet shipment in Japan dropt 1.9%

According to the data released by Japan Iron and Steel Federation(JISF), in first half year the output of galvanized steel sheet include tinplate in Japan was 5.8 million tons, declined 2.8 pct from the same period last year. The output of it was 914,676 tons in June, declined 8.1 pct from last year.Shipment dropt 1.9 pct to amount 5.9 million tons, and 68 pct of that sold to domestic and 32 pct of that were export.And shipment in June were 959,288 tons, dropt 5.4 pct from May and 5.8 pct from same period last year. In June, stock of galvanized sheet includes tinplate totaled 935,516 tons, reduced 4.6 pct from May and 8.9 pct from last year, in which steel enterprises held share of 63 pct and merchants held share of 37 pct. 
  

In Q2 this year, domestic average price was 92,000yen per ton (about USD930/T), which were similar with that in May and declined 6,0000 yen per ton (about USD61/T) compared to the same period in last year. 

California jail break: How rare are US prison escapes?

Three inmates escaped from a Southern California maximum-security jail Friday, leaving authorities scrambling for answers.

“We’re talking about breaching, in some places significant amounts of steel, rebar and metal,” sheriff’s Lt. Jeff Hallock told the Associated Press. A defeat that required sophisticated tools from outside the jail. 

After prison tailor Joyce Mitchell pleaded guilty to helping two upstate New York inmates Richard Matt and David Sweat escape last summer, the spotlight is being turned on employees in the Orange County jail who may have helped the three inmates escape Friday. 

Recommended: Infographic Crime falls in the US. Are you safer today?

“We’re going to take a look at everybody who may have been assigned there,”  Hallock told the Associated Press. “What I can assure you is that the compromises in security have been shored up.” He did not elaborate on any current in-house leads.

Although this is the second major jailbreak to make national news within a year, prison escapes are actually rare – and getting rarer - in the US. 

In 2000, the Bureau of Justice Statistics reported 37.1 escapes per 10,000 prisoners. And in 2013, this rate had decreased to 12.7 escapes

But even the rate of 12.7 escapees per 1,000 inmates is misleading. The Bureau of Justice Statistics groups together “escapes” and “AWOL” (Absent Without Leave) incidents to arrive at this total. While “escapes” classifies events like the New York jailbreak by Matt and Sweat last summer and Friday’s events in Orange County, AWOL’s are less exciting but more common. 

AWOL can be attributed to a prisoner who comes back late from furlough or can’t be identified on a worksite for a few hours. AWOL and escaped prisoners are very different, but some states don’t differentiate between the two.   

Looking exclusively at escapes, the national rate in 2013 was 10.5 per 10,000 prisoners. 

“Out of the reported escapes in 2013, only three left a community work center, 16 walked off a work site, and one actually escaped from a security facility. The rest just failed to check in or meet some other requirement for their sentences,” CNBC explained in June. 

And the overall rate of AWOLs and escapes has decreased during a time when the US incarcerated population is growing. 

Over 2.2 million people were incarcerated in the US in 2014, and 2.8 percent of all adults in the US were under some form of correctional supervision accounting for probation, parole, and incarceration. 

It has not been a steady increase; since the turn of the century some years have seen small decreases in the overall US incarcerated population. But over 85 percent of the decreases in the correctional populations are attributed to the decline of persons under probation, not the actual incarcerated inmates. 

“It’s very rare – this happens very infrequently, which is why it’s such a story,” Martin Horn, professor of corrections at John Jay College of Criminal Justice at City University of New York, told USA Today after the New York escape last year. He says when he tried to analyze recent breakouts, “There weren’t even enough incidents to study.”

Hallock says Friday’s escape was the first jailbreak at the 900-inmate facility in over 20 years. 

Jonathan Tieu, Bac Duong, and Hossein Nayeri were all held in Orange County Men’s Central Jail awaiting trail for violent, but unrelated, crimes. Tieu is accused of a gang-related murder; Duong of attempted murder and Nayeri of kidnapping and torturing in a drug deal gone wrong. 

The escape wasn’t noticed for 16 hours, until a guard realized three inmates were missing from a 65-man dormitory during a 5 a.m. headcount Friday. 

The three men used tools to first cut through the dormitory wall and into plumbing tunnels. Then again cutting their way through half-inch-thick steel bars, the prisoners made their way to the roof where they rappelled to the ground using ropes made of braided linens. 

Federal authorities are now offering a $50,000 reward to anyone who may have information regarding the inmates’ whereabouts. 

“We’re in a position where we absolutely need the public’s help,” Hallock told the Associated Press. “There’s people out there that know who these people are, who may have seen them. We’re asking for phone calls, whether it’s any piece of information you may have. We’re exhausting every lead that we currently have.” 

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Reconnecting Your Students to the Lessons of Nature

Reconnecting Your Students to the Lessons of Nature

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We need to take kids out into nature! Far too many children are growing up not seeing the beauty of nature and not learning to respect the danger. We are going to inherit the future where the only thing valued by this generation is made of concrete, rebar, and steel. The lone wildflower that springs up in the sidewalk will just be seen as a weed. We need our kids fording streams, climbing…

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The Feature Staircase in the new Museum

By: Tom Thurston, Director, Capital Development

Centred in the heart of our new building is a grand, free-standing feature staircase. Its design is inspired by Alberta mountain canyons, especially Johnston and Maligne canyons in Banff and Jasper national parks. The staircase, which leads to the second floor lobby and the Natural History gallery, provides spectacular views of our naturally-lit lobby space below.

To achieve a structure of this nature without additional supporting posts or columns dictated the clear choice of construction system; poured-in-place steel-reinforced concrete. This type of construction system is very time consuming because you need to hand-construct the staircase three times.

Workers carefully fabricate the steel rebar components that form the structural skeleton which supports the staircase once it is finished.

First, carpentry crews that specialize in concrete formwork build a detailed wooden mould to the exact shape of the finished staircase. This shape must be fully reinforced to support the entire weight of the concrete, the steel, and the workers climbing about it. Extra bracing is also needed on the sides because concrete, when in its liquid state, will try to push it out. Once the mould is made, the inside is sanded smooth and is carefully coated with an epoxy resin because the quality of the mould surface will dictate the surface finish of the concrete.

Second, a crew of metal workers builds a framework of steel rebar. The rebar pieces are all tightly wire-tied together to form a skeleton that will provide support to the final form. Each piece of rebar needs to be accurately custom-shaped before being tied into position. Extreme care must be taken not to scratch the epoxy mould surface because scratches would be cast in the concrete.

Workers are carefully levelling off the treads of each stair as the concrete starts to set.

The third step is the actual pouring of the concrete. Getting the correct proportion of cement, aggregate and water is not a simple task. Each batch must be stiff enough so that the aggregate does not separate from the cement and sink to the bottom of the mould, yet it needs to be pliable enough to flow into all the crannies and crevices of the mould and around the rebar so that there are no gaps or voids in the finished staircase. Workers use specially designed vibrators, tampers and trowels to quickly work the concrete into place. Due to our staircase’s overall height and complexity, Pagnotta, our concrete specialist, has chosen to pour it in two separate stages. This is in part due the short working time of setting concrete as well as concern about keeping a full column of fresh poured concrete fully contained.

After 14 days, the concrete has fully set and it’s time to pull apart the mould and reveal the finished staircase—soon to be the focal point in the lobby of our new museum.

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Building Facts for the Salesforce Tower

The Salesforce Tower in downtown San Francisco is one of The Conco Companies more recent projects and we are currently preparing to do another huge mat pour for the Tower.  This new undertaking will be the largest continuously pumped mat pour done in San Francisco, and by the end of the pour, we will have placed nearly 14,000 cubic yards.  

In recent interview done by the San Francisco Business Times with Michael Tymoff, the senior project manager for the development company, Boston Properties, mentioned that the building could exceed LEED Platinum certification.  Presently the building is pre-certified for LEED Platinum but is intending to add features that are certain to increase the energy efficiency of the Tower such as wind turbines on the roof and other power saving ideas.  

The building is loaded with high-end features that include tall ceilings on each floor that will be as high as 13 feet tall, and 10 foot-high windows throughout the building to offer fantastic views.  Furthermore in an effort to provide exceptional air quality, every floor will have 100% natural air pulled into the building by units that are located on the floor.    

The $1.1 billion project is expected to be complete in 2017 and with a height of 1,070 feet; it will become the second tallest skyscraper west of the Mississippi, just behind the Wilshire Grand Tower.  In addition to the mat pour, Conco was awarded the concrete and rebar contracts for the building.  The building will consist of a concrete core with a structural steel frame that will require lightweight concrete to be pumped to the kinds of heights we have successfully been doing for the Wilshire Grand Tower project in Los Angeles.   

Sources:  bizjournals.com/sanfrancisco/blog/real-estate/2014/07/salesforce-tower-boston-properties-hines-transbay.html?page=all  

Conco is one of the leading concrete contractors in San Francisco offering a range of innovative, quality services.  We have been honored to work on many high-profile projects and were recently awarded the concrete contract for the San Francisco 49ers Stadium.  Our concrete services include commercial, educational, parking and other construction development as well as public works projects.

Reconnecting Your Students to the Lessons of Nature

Every Classroom Matters episode 209

From the Cool Cat Teacher Blog by Vicki Davis

Follow @coolcatteacher on Twitter

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We need to take kids out into nature! Far too many children are growing up not seeing the beauty of nature and not learning to respect the danger. We are going to inherit the future where the only thing valued by this generation is made of concrete, rebar, and steel. The lone wildflower that springs up in the sidewalk will just be seen as a weed. We need our kids fording streams, climbing mountains, and getting down on all fours to look at an insect they’ve never seen before. Listen to the show.

According to a 2015 Outdoor Recreation report (linked in resources), outdoor recreation is at its lowest levels since the report began in 2006. Only 60% of kids aged 13-17 report ONE outdoor activity in 2014. (Adults aged 18-24 have only 56% reporting one outdoor activity!)

Today’s show is about a school that takes kids outside into nature.  Many schools are canceling these nature field-trip events for safety or financial reasons. Never taking school children outside is a grave disservice to this generation who needs to get outdoors more than ever before. Let’s talk about nature, learning, and one thing we should be teaching in school.

Essential Questions: Reconnecting Your Students to the Lessons of Nature

  • How is an extended overnight nature experience be run by a school district?
  • How do you educate children on outdoor safety?
  • How can you raise money and secure parent support for nature learning experiences?
  • How does a successful 45-year outdoor nature program keep going in a budget-crunch situation?
  • What are the benefits from an overnight nature experience?
  • What technology can you use to help kids learn more about nature?
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The post Reconnecting Your Students to the Lessons of Nature appeared first on Cool Cat Teacher Blog by Vicki Davis @coolcatteacher helping educators be excellent every day. Meow!

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from Cool Cat Teacher BlogCool Cat Teacher Blog
http://www.coolcatteacher.com/reconnecting-your-students-to-the-lessons-of-nature/
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Iran High Performance Tensile Rebar Steel

Iran High Performance Tensile Rebar Steel