Laminated Concepts Inc.

economy • strength • durability • beauty

Celebrating 35 years of being a proud supplier of quality engineered glued laminated timber products for the transportation industry.

Solutions......

  • BRIDGE PROBLEM & CRITERIA:
  • 1 week maximum road closure from demolition to opening for traffic
  • 2 day maximum bridge superstructure construction schedule
  • LRFD HL93 loadings, Crash Tested Guide Railings and meeting the hydraulics of the existing superstructure. 
  • SOLUTION:
  • Pre fabricated, Stress Laminated Glu Lam Deck.

For a County in New Jersey that is exactly what was chosen for this 42'-0 bridge span. The bridge utilizes treated glued laminated beams placed side by side with field installed transverse stressing rods, stressed to a predetermined level. Using stressed beams instead of systems like a stringer bridge with transverse deck, allow the depth of structure to be kept to a minimum, matching the previous structures depth.

The bridge is designed with a 10° skew to align with the stream profile. Stress laminated decks require that the stressing rods are placed perpendicular to the bridge structure. Each beam had to have different fabrication performed due to them being offset from the adjacent beams.

All the holes were predrilled at the plant prior to pressure treatment.

Within the first day, all beams were set and aligned.  The high strength rods were installed then stressed.

The second day was left to assemble the Crash Tested guide railing and anchor the bridge to the concrete abutments.

Wood and Water (Part 2)

To continue the conversation of water protection of wood, I would like to discuss Glu Lam transverse decking. Transverse decking is used on structures with steel stringers as well as timber stringer bridges making it probably the most common type of timber bridge component used. Due to the nature of the timber deck orientation, the deck ends (which contain all end grain) are exposed to the elements, rain, snow & ice as well as water runoff from the roadway surface.

Protection of this face of the panel is important to the longevity of the material itself. You always have to look for ways to keep the material dry and stable.

The following are some pictures of a recent deck project where pre bent metal drip edges were manufactured and placed on alternating panels where scupper opening will occur. Our hope is that the panel end grain will be protected from any water run off. This detail can be used on decks that do not have alternating panels as well. Note that installation is required prior to rail placement.

Wood and Water (tips)

Just a quick note for this construction season. It doesn't require a lot of time or money to help protect your timber structure from water. A simple drip edge, placed at the scupper openings prior to membrane and paving, will help protect the deck face from water runoff.

30 years with Apple....

It's early on this Friday morning as I peruse the internet for the latest news. What catches my eye? Apple Computer is celebrating their 30th year with the MacIntosh computer, oddly enough, coinciding with our 30th year in business. Which gets me thinking....

I still remember the day ,30 years ago, walking into the computer store, in search of LCI's first work computer. And there it was.....the Mac,  beaconing to me......with that silly magician graphic on the screen and the trademark "dong"  sound while booting up.  I was sold. I convinced my partners that this is what we needed and we walked out of the store carrying the small pc back to the office. 

Now...Apple is a multi billion dollar corporation with assets and profits to amaze the heartiest accountant. Their computer systems have expanded and changed the way humans interact. Yet, LCI remains a small, personal company that actually answers the phone when it rings. And we have single handedly gone through most of the MacIntosh models.

So, in no way, can we compare to Apple Computer...yet we can say..that our first bridge supplied...30 years ago..in 1984....is still in service and performing as designed for the owner......can Apple say that?

Copyright  2019 LCI.