Erection load

Erection load The load produced in the mast and its supporting structure during the raising and lowering operation. 

Erection loads (zero wind load) composed of the following loads in combination ... 

Q. Section 1926.752(a)(1) sets strength requirements for concrete in footings, piers and walls that support steel erection loads. In assessing concrete strength, how many samples must be taken ... 

One particular form of such activity which can be particularly hazardous is the use of false-work. Falsework is a temporary structure used to support a non-self-supporting structure during its construction or refurbishment. An example is the wooden structure to support a brickwork arch which is being built. Only competent persons should plan, erect, load or dismantle false-work. The collapse of false-work structures is common and, when occurring at height, can cause serious injury. Most accidents caused by the collapse of false-work are caused by the lack of liaison between the various trades using it and its suppliers or erectors. 

Local buckling effects or initial stress arising from thermal effects or erection loads are typically not included. 

The difficulties of such operations on the research platform Nordsee are described in Ref. 9. The Murchison platform was provided with a combination of impressed current protection and galvanic anodes because there was a limit to the load to be transported [12]. The anodes for platforms are installed and provided with cables at the yard. They are installed with redundancy and excess capacity so that no repairs are necessary if there is a breakdown. The lower part of the platform up to the splash zone is usually placed in position in the designated location at least 1 year before the erection of the deck structure so that impressed current protection cannot initially be put in operation. This requires cathodic protection with galvanic anodes for this period. This also means that the impressed current protection is more expensive than the galvanic anodes. 

A mast raised and lowered by wire rope shall have the wire rope sized to have a nominal strength of at least 2- times the maximum load on the line during erection. 

The drilling and well servicing structure manufacturer has carefully designed and selected materials for his or her portable mast. The mast should perform satisfactorily within the stipulated load capacities and in accordance with the instructions. Every operator should study the instructions and be prepared for erecting, lowering, and using the mast. 

Foundations must consider ground conditions, location preparation, and supplemental footing as required to provide a stable base for mast erection and to support the mast during the most extreme loading encountered. A recommended location preparation to provide ground conditions for safe operations is shown in Figure 4-6. 

During the erection period access will be needed for the heavy loads, storage of equipment and for erection. 

Since the handling methods require power-driven fork-lift trucks, nearly all cold stores are now erected as single-storey buildings with the insulation in the form of factory-made panels. The main loading bay will probably be at tailboard height, so that products can be taken directly in and out of insulated vehicles. 

A careful site survey should be carried out if the building is already erected, to verify the given data and search for load factors which may not be apparent from the available information [21]. 

Erection and maintenance 1500 N concentrated load on any structural member. 

Case packer. This collects and arranges the bundles in the required patterns, then pulls down a shipping carton from the magazine and loads the pattern into the erected case. 

Economics The ISBL 2004 Gulf Coast location erected cost, including first load of catalysts and chemicals, with 30% allowance for offsites. 

When construction is to be subcontracted, some accounts (civil, insulation, and paint) are usually estimated on a total cost basis, combining both materials and labor. Other accounts (piping, electrical, instrumentation, equipment erection) are estimated and shown separately as material and labor. In that case, the labor should be loaded with the subcontractor s field indirects plus overhead and profit. The field indirects would reflect only the cost of construction management. 

It is always a good practice to also use the labor survey to investigate, with both contractors and users, the current unit prices of the most important construction components, i.e., cubic yards of concrete, tons of structural steel (erection), craftsman hours (loaded), etc. 

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