#Imetco splice plate detail full

I can hardly imagine that a similar weld will cause problems in seismic conditions. After the earthquake the failures led to changes in the type, size and detailing for moment frames. Yes, the Northridge earthquake while not a design level event nearly had building failures from non-brittle failure modes in modern, for the time, moment frame buildings. RE: HSS column splice kingnero (Mechanical) 21 Dec 19 06:41 Remember that the easiest splice to design may not be the most economical option, especially in large buildings with many splices. Various splice options are available for HSS columns and the project specific requirements will dictate which splice type is the best fit for integrating the structural loads and construction costs. Splices allow the HSS columns to be installed in multiple pieces, yet preserve structural continuity. Splices for HSS columns are required in building construction for various reasons, such as transportation and construction limitations. The weld still develops a high amount of strength, thus the moment capacity of the splice can still be large if needed.

When detailing the splice, the HSS shall have sufficient thickness to meet the geometric requirements of the PJP weld. The bevel prep work is still required during fabrication, however, the weld takes less time in the field, the backing material is not needed and the special inspections are not required. In some cases, the seismic provisions require the backing material for CJP welds be removed after the weld is complete which is not possible since the inside of the column is not accessible after the weld is in place.Ī partial joint penetration weld (PJP) is a more economical alternative for the directly welded splice. Third, backing material is required on the inside of the tube further increasing the cost due to extra fabrication time in addition to prepping the top column with bevels for the weld. Second, a CJP weld requires special inspection which increases the cost and can impact the schedule depending on the timing of the installation and inspections. First, it takes a highly qualified welder a significant amount of time to complete the weld. However, there are three major drawbacks to detailing a CJP welded splice.

#Imetco splice plate detail full

Using a complete joint penetration (CJP) weld will provide the strongest splice resulting in full moment capacity of the HSS section. As with the side plate, the axial compression is transmitted through direct bearing of the column ends. Perhaps the easiest splice to design is the direct welded splice, however, it may also be the most expensive splice option.