What diameter do vertical storage tanks generally have to have spiral ladders?
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I would like to ask everyone: at what diameter do steel vertical storage tanks generally start to be equipped with spiral ladders, and at what diameter are straight ladders used? Thank you!
A normal width is sufficient. There are three options: 700, 900, and 1200
It seems that a spiral staircase is required when the height of the storage tank exceeds 6 meters; in our company, spiral staircases are used for tanks with a capacity of 100 tons or more, while straight staircases are used for those with a smaller capacity
Are there any corresponding standards, such as GB, SH, etc.? Thank you very much
Code for Design of Small Oil Depots and Gas Stations GB50156-92, Article 2.3.5: Ladders and handrails shall be provided for oil tanks. For vertical oil tanks with a height greater than 5m, spiral stairs or inclined stairs should be used. The horizontal oil tank cluster combined platform shall be equipped with inclined ladders, at least two in number. Anti-slip steps should be provided in areas on the roof of arch-shaped tanks that are frequently walked on.
The national standard atlas for steel ladders is 02J401, which can be used as a reference. Hey, the forum actually has a character limit.
Code for Design of Oil Storage Tanks (GB50074-2014), Section 6.4 Tank Accessories, 6.4.1 Vertical storage tanks shall be equipped with ladders, platforms, and handrails at the top of the tank. Vertical storage tanks with a height greater than 5m should be equipped with spiral ladders.
For vertical oil tanks with a height greater than 5m, spiral stairs or inclined stairs should be used.
Many things are done in accordance with petrochemical standards; the actual construction site may vary, but safety comes first and must be taken into consideration.
Many things are done in accordance with petrochemical standards; the actual construction site may vary, but safety comes first and must be taken into consideration.