Water Storage Tank Roof Rafter Beam Earthquake Straps

The binder should be nailed to the ceiling joists and rafters after the roof is loaded but before plasterboard is fixed to.

Water storage tank roof rafter beam earthquake straps.

The pressure is provided by the flow of water with all roof manway plates tightly closed. There are 16 inches of fiberglass insulation above the ceiling. Tank damage mode at hanshin awaji earthquake. Extensive requirements were added for anchor bolts and anchor straps.

In this work the tank used has been treated by several authors 8 15 the tall tank has a height to a radius ratio h r of 2. If you re framing a gable roof on a new house or building a shed or even a doghouse with a gable roof you ll need to cut a number of roof rafters. The storage of water spherical tanks pressure vessels for the storage of high pressure liquefied. It begins with design.

The event of earthquake the design spectrum for sloshing in tanks the design pressure for silos. Storage tank dome roof storage tank conical roof fuel storage tank capacity approx 2 000 000 liters fixed roof and internal floating roof irrigation water storage tank. Either by using a steel strap tying the wall plates together or a steel anchor strap may be. The sloshing phenomena and pressures by the sloshing on the tank roof have been presented.

Before you cut your boards you ll need to measure the width of your building and calculate the exact length of each rafter. European erasmus mundus master course sustainable constructions under natural. B 1 4 water cistern support 141 b 2 trussed rafter roofs 145 b 2 1 general 145. The terrace water storage tank is generally constructed using brick masonry which is placed on an elevated platform to provide a reserve supply of water for daily house activities.

Roof framing consists of pre engineered wood trusses at 16 inches o c. Ceiling is inch plaster with inch plywood backup. What follows is advice from four manufacturers of water storage tanks and two tank consultants whose job it is to independently inspect water tanks as they are being built repaired or recoated. The top chord consists of 2x6s and the web and bottom chord consist of 2x4s.

In the three dimensional tank most developed models use shell element for the wall the roof and the tank bottom beam elements for the roof rafters and fluid element for liquid containing cylindrical tank. Roof rafters designed using a roof live load greater than 50 lb ft 2 2 400 n m 2 may utilize higher allowable stresses when using material with minimum specified yield strength greater than a36 material. Pressure under pressure testing for the tank s body and roof. The roof rafters provide integral structural support to the roof.

Fixed roof of a tank without a pontoon is tested for excessive pressure with the tank filled to the level which is 10 lower the planned level with keeping the load for 30 minutes.