Skyscraper Floor Section Thickness

Maximum spacing of supports mm.

Skyscraper floor section thickness. And the wtc was being upgraded as floors become open to a new level of fireproofing before 9 11. Joists in home construction are usually made with 2 by 10 or 2 by 12 lumber. Many buildings also have diagonal beams running between the girders for extra structural support. The fireproofing level code used on the wtc was change in the city of new york right before this project begin.

Osb o 1 grade and. The central support structure of a skyscraper is its steel skeleton metal beams are riveted end to end to form vertical columns at each floor level these vertical columns are connected to horizontal girder beams. The building code requires 5 8 inch plywood or osb. This construction is suitable in reasonably stiff soils or marl.

There are thinner types of drywall but they are not adequate for ceiling installation. Plywood and osb o 2 grade. The bulk of the floor s thickness comes from the joists which are the horizontal beams that carry the floor s weight. Standard drywall installed on the ceiling below the floor adds a minimum of 1 2 inch to the floor thickness.

When nwfa guidelines minimums are not met the recommendations are to overlay the existing subfloor material with a 1 2 inch panel product or add structural support from below. Where the building will be on rock the thickness of the footing may be reduced but timber buildings are very light and can easily be blown off of their. In some cases such as a party ceiling which separates individual apartment units building code may require double drywall layers to reduce. The older building around the wtc comples that had the old code and was of newer construction faired very well.