Civil Engineer Expert

Most commonly, the term ‘contractor‘ is used to describe an expert in the construction industry who hires skilled and unskilled workers to actually construct a financed project. A contractor must be licensed by an examining board before he or she can bid on the project.

This bid is based on the estimated cost of the building materials, the wages of subcontractors and laborers and the contractor’s fee for coordinating the project.
Although a contractor’s main concern is hiring qualified subcontractors (specialized craftsmen paid by the contractor), he or she may also perform some of the construction work as well. Most contractors develop good working relationships with other construction specialists, so they often hire the same specialized companies and workers for each contracted project. The contractor is ultimately responsible for the quality of the work performed by subcontractors, so it doesn’t always pay to hire unknown entities to cut down on expenses.

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 Bidder Responsibility Determination is also known as: bidder evaluation criteria, contractor responsibility determination, vendor responsibility determination, bidder evaluation worksheet.

Because bid evaluation and comparison are limited to price and other price-related factors only, the decision cycle of Bidder Responsibility Determination is shorter than other competitive procurement methods that have to deal with more complex, non-price-related evaluation factors.

Evaluation of bids is two-fold. After the bid has been determined responsive, the bidder must be deemed responsible, as detailed below.
Bidder Responsibility Determination
To be determined responsible, a bidder must be successfully evaluated against the 7 following criteria:

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 When searching for construction software to help run your business cost should not be your ultimate concern because the old adage is true – you really do get what you pay for.

Just as you wouldn’t hire a high school kid to do your accounting because you could get him cheap, you also shouldn’t pick a software package based solely on price. After all, this is your business you’re dealing with.

That said, there are many affordable (and even free) construction software packages out there. A business software application that is totally free, however, may raise a few red flags. How good can it be if they are giving it away? Can I get by without any product support? Do I really want to entrust my business to an untested product that I got free off the Internet? These are very good questions that you should ask yourself before choosing a free construction software program.

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 Flat roofs on which water may accumulate may require analysis to ensure that they are stable under ponding conditions. A flat roof may be considered stable and an analysis does not need to be made if both of the following two equations are satisfied:

C p + 0.9 C s £ 0.25

I d ³ 25S 4 / 10 6

Where

C p = 32 L s L 4 p / 10 7 I p

C s = 32 SL 4 s / 10 7 s

L p = length, ft (m), of primary member or girder

L s = length, ft (m), of secondary member or purlin

S = spacing, ft (m), of secondary members

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 The total number of connectors to resist V h is computed from V h / q, where q is the allowable shear for one connector, kip (kN). Values of q for connectors in buildings are given in structural design guides.

The required number of shear connectors may be spaced uniformly between the sections of maximum and zero moment. Shear connectors should have at least 1 in (25.4 mm) of concrete cover in all directions; and unless studs are located directly over the web, stud diameters may not exceed 2.5 times the beam-flange thickness.

With heavy concentrated loads, the uniform spacing of shear connectors may not be sufficient between a concentrated load and the nearest point of zero moment. The number of shear connectors in this region should be at least

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 In composite construction, steel beams and a concrete slab are connected so that they act together to resist the load on the beam. The slab, in effect, serves as a cover plate. As a result, a lighter steel section may be used.

Construction In Buildings

There are two basic methods of composite construction.

Method 1. The steel beam is entirely encased in the concrete. Composite action in this case depends on the steel-concrete bond alone. Because the beam is completely braced laterally, the allowable stress in the flanges is 0.66F y , where F y is the yield strength, ksi (MPa), of the steel. Assuming the steel to carry the full dead load and the composite section to carry the live load, the maximum unit stress, ksi (MPa), in the steel is

F s = ( M D / S S ) + ( M L / S t r ) ? 0.66F y

where

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AISC requires that fasteners or welds for end connections of beams, girders, and trusses be designed for the combined effect of forces resulting from moment and shear induced by the rigidity of the connection.

When flanges or moment connection plates for end connections of beams and girders are welded to the flange of an I- or H-shape column, a pair of column-web stiffeners having a combined cross-sectional area A s t not less than that calculated from the following equations must be provided whenever the calculated value of A s t is positive:

A s t = ( P b f – F y c t w c ( t b + 5k ) ) / F y s t

where

F y c = column yield stress, ksi (MPa)

F y s t = stiffener yield stress, ksi (MPa)

K = distance, in (mm), between outer face of column flange and web toe of its fillet, if column is rolled shape, or equivalent distance if column is welded shape

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