Engineering and Design Services
Atlantic Concealment offers a comprehensive concealment engineering and design service that we provide to either the assigned A&E firm or our customer based on your specific requirements. Please contact us if you would like to discuss our services in detail.
FRP - Frequently Asked Questions
- What codes do you use for FRP design?
- Use IBC1 and ASCE2 and any local codes that apply.
- Can I use the TIA/2223 code for FRP analysis?
- Only for tower related structures like poles and lattice towers. It is not recommended that the tower code be used for FRP and any rooftop concealment application.
- Is it true that angles and channels should not be used in flexure? And if no, why?
- Yes. Unlike steel, FRP angles and channels should not be used under wind or roof loads unless both flanges are fully braced. For example if you look at design load tables in the Strongwell4 website, you will not find load tables for both channel and angles.
- What structural shapes can support flexural loads5?
- Square and rectangular Tubes, Wide flange and I beams as a general rule.
- Are FRP connections the same as steel?
- No. It is difficult to get a moment connection using FRP. Only certain connections should be used and clip angles can only be used in a specific manner.
- Can I design a moment connection using FRP?
- Standard moment connections for FRP-FRP basically do not exist. Therefore each connection should be analyzed for loads in three directions. Some FRP-steel moment connections can be made to work.
- Does FRP have a fire rating?
- Yes, we use both fire rated and non fire rated depending on the application.
- Does FRP have UV stabilizers?
- What preparation is required for FRP connections?
- All FRP connections should use a structural adhesive for all connections. This includes FRP hardware. All FRP shapes are protruded and therefore have a mold release agent that must be removed. We factory treat most connection points to remove the mold release.
- Can FRP be painted?
- Yes, the mold release must be removed however.
- Should adhesive be used on connections?
- Yes, we call for an adhesive to be applied to all FRP-FRP connections and all FRP hardware. Normally adhesive is supplied with our products.
- What is the best way to cut FRP?
- In the field we recommend a portable band saw. Allow for extra blades as FRP is difficult to cut.
- What kind of drill bits are needed for field drilling FRP?
- Use carbide tipped bits and use a drill sharpening tool to keep the bits sharp.
- Does Atlantic Concealment shop cut and drill FRP?
- Yes in most cases. We try to reduce on-site fabrication as much as possible. This does add some cost to our product but the end result should be lower overall costs.
- Do you offer a service to review my zoning or construction drawings before I submit to the city?
- Yes. Contact firstname.lastname@example.org
- Do you offer Stamped and Sealed Design Drawings for all 50 states?
- Yes as well as Canada and other countries
1 The International Building Code (IBC) is a building code model developed by the International Code Council (ICC). It has been adopted throughout most of the United States and Canada.
2 American Society of Civil Engineers http://www.asce.org/
3 The tower code as it is frequently referred to, is incorrectly and all too frequently used by AE firms and
our competitors for rooftop concealment structures. The tower code is just that, a code developed for self supporting tower structures. The correct codes are building codes as a concealment structure attaches to the building structure. Go to http://www.tiaonline.org/index.cfm for more information.
4 Visit www.strongwell.com and go to the design tools for load table data.
5 It is a common and erroneous practice to use angles and channels under flexural loads such as wind and roof loads. FRP manufacturers like Strongwell advise against this. Unlike steel, an angle or channel is week at the web between flanges. Failure will result when bending stresses exceed allowable. This is why Strongwell does not show load tables for angles and channels. The only acceptable application is when the member is continuously braced.