Design stairways - ladders and platforms, Mechanical Engineering

Assignment Help:

Q. Design Stairways - Ladders and Platforms?

Stairways, rather than ladders, should be provided for main access to elevated structures. Ladders should be reserved for isolated points which are visited infrequently. Ladders and platforms shall be provided as required for access to manways, operating valves, and instruments. Ladder arrangements should be established early in the project in order to avoid reworking and re-orientation. Ladders should be side step off rather than through.

Combined tower platforms shall be furnished when practical or economical on "lined-up" towers with common manway elevations, providing tower differential expansion permits. Platforms or catwalks joining two towers together should have a slide plate or hinged section to allow for vessel movement or expansion.

Side platforms are to be provided for access to manways, instruments, valves and equipment, and for cross-overs between ladders. The size of these platforms should be kept to a minimum. The width should be minimum 900 mm (3 ft.), but shall be enough to permit opening of the manway cover or to provide a minimum of 450 mm (1.5 ft.) clearance between the handrail and piping such as a level controller, gauge glass, level switch or safety valve. Platforms need not extend underneath valves and equipment to make them accessible.

Tower manways, depending on tray arrangement, access, and maintenance area for vessel, shall generally be located to the rear of the vessel (away from the pipe rack), with all manways on or about the same centerline of orientation. Manways shall be located to give good access to the tower drop down area, so that tower internals removed through the manway require minimum manhandling to access the davit or crane.


Related Discussions:- Design stairways - ladders and platforms

Rails - flat footed rail, Rails: Rails are the part of the Permanent ...

Rails: Rails are the part of the Permanent Way on which the wheels of the train travel. The rails also maintain the gauge separation. Rails have to possess the following d

Production test rings, Q. Production Test Rings? The frequency for the ...

Q. Production Test Rings? The frequency for the tests shall be as follows: • One sample at the 10th joint • One sample at the 75th joint • One sample at the 300th join

Compute the angular velocity of the wheel, Compute the angular velocity of ...

Compute the angular velocity of the wheel: A wheel of 0.5 m radius rolls over a horizontal surface without slipping as illustrated in Figure (a). The velocity of its centre is

Components of steam power plant, Component s of Steam Power Plant: Th...

Component s of Steam Power Plant: There are four components of steam power plant: 1. The boiler: Hot-source reservoir in which the combustion gases raise steam. 2. Engi

Operation research, Importance of operation research in decision making

Importance of operation research in decision making

Calculate diameter of runner, A radically inward flow turbine working under...

A radically inward flow turbine working under a head of 10 m and running at 250 rpm develops 185 KW at the turbine shaft. At inlet tip of the runner vane, the peripheral velocity o

Thermocouple, calibration curve standard temparature vs indicator tempratur...

calibration curve standard temparature vs indicator temprature.

What are the objectives of the earth pressure, What are the objectives of t...

What are the objectives of the earth pressure and retaining structures? After knowing all concepts about the same you should be able to learn: a. Know the field situations w

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd