Questions
&Answers
A- With no drawing available, you will want to cut coupons from the torsion tube and section(s) (if there are ring or butt splices) of column pipe, making sure these areas are patched by a certified welder. The coupons must be sent to a testing firm and checked for tensile strength. The other structural members, angles, beams, plates and bolts, will need to be measured and all of this information passed on to an engineer so he may calculate the upgrades that are needed.
All Steel attempts to keep records of every structure they have built for you. If you have the drawing number, invoice number or All Steel’s job number it will help us locate the records of what we originally built at your loctaion.
All Steel attempts to keep records of every structure they have built for you. If you have the drawing number, invoice number or All Steel’s job number it will help us locate the records of what we originally built at your loctaion.
A- The duration can vary, but once you notice rust, take the time to repaint. Use a wire brush or medium grit sanding sponge to remove any rust or loose paint. Any spots that have been cleaned down to bare metal should be touched up with primer. Once the surface is clean, we suggest a quality grade, oil or water based industrial enamel. Most paint manufactures offer multiple grades of paint so don’t go by name brand alone. Take the time, whether rolling or spraying to evenly cover the entire surface. Keep in mind that wind will also be a factor if you paint out-of doors. Always check the weather report to ensure you've picked a couple calm, dry days to repaint.
A- Carbon steels are the most economical grades, but they also have the lowest strength or yield point, which is usually measured in kips per square inch of cross section (ksi). In structural engineering a kip is 1000 pounds. Higher strength, low-alloy steels are stronger than carbon steels, but they may be more expensive. The various grades of structural steel are identified by specifications established by the American Society of Testing and Materials, commonly referred to as the ASTM. The two most common grades we use in fabrication are described below.
ASTM A36- An all-purpose carbon steel, is the most widely used structural steel for commercial and industrial building construction. This grade has a yield stress level of 36ksi, and has excellent welding and machining characteristics, thus is ideal for making welded and/or bolted connections.
ASTM A572- A higher strength steel, is another popular grade of structural steel used in building construction. May be bolted or welded. It is available in four minimum stress levels: 42 ksi, 50 ksi, 60 ksi and 65 ksi grades.
ASTM A36- An all-purpose carbon steel, is the most widely used structural steel for commercial and industrial building construction. This grade has a yield stress level of 36ksi, and has excellent welding and machining characteristics, thus is ideal for making welded and/or bolted connections.
ASTM A572- A higher strength steel, is another popular grade of structural steel used in building construction. May be bolted or welded. It is available in four minimum stress levels: 42 ksi, 50 ksi, 60 ksi and 65 ksi grades.
