Erection plumbness

Plumb tolerance. Towers must be erected plumb to the manufacturer s tolerance and verified by a qualified person. Where the manufacturer does not specify plumb tolerance, the crane tower must be plumb to a tolerance of at least 1 500 (approximately 1 inch in 40 feet). 

Richt-aualyse /. guide analysis, approximate analysis, -blei, n. plumb line, plummet, richten. irt. direct, turn arrange, adjust, align, set, straighten orient dress raise, erect judge. — v.r. turn, rise, conform. 

Buildings and Structures The cost of the erection of buildings and structures in a chemical process plant as well as the plumbing, heating and ventilation, and miscellaneous building service items may be estimated as 20 to 50 percent of dehvered equipment costs or as 10 to 20 percent of the fixed capital investment for a preliminary estimate. 

The requirements for flooring, structural steel assembly, bolting, riveting, fitting-up, and plumbing-up are discussed in this subpart. The standard also addresses the Personal Protective Equipment (PPE) standards for steel erection. 

Frames and panels shall be braced by cross, horizontal, or diagonal braces, or combination thereof, which secure vertical members together laterally. The cross braces shall be of such length as will automatically square and align vertical members so that the erected scaffold is always plumb, level, and square. All brace connections shall be secured. 

The designated erector should be allowed onto the suspended double tee, otherwise there is no control over the horizontal movement of the double tee and this movement could knock the spandrel off of its bearing or the column out of plumb. The control necessary to prevent hitting the spandrel can only be done safely from the top of the double tee being erected. 

The use of safety nets where structural wall panels are being erected would prevent movement of panels to point of installation. To be effective, nets would necessarily have to provide protection across the area where structural supporting wall panels would be set and plumbed before roof units could be placed. 

When deemed necessary by a competent person, plumbing-up equipment shall be installed in conjunction with the steel erection process to ensure the stability of the structure. 

In an ideal erect posture, a plumb line dropped from the ceiling along the body s midline would pass through the following points ... 

Are tube and coupler scaffold posts accurately spaced, erected on suitable base, maintained plumb, and brace connections secured ... 

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