Tag Archives: 10d nails

Installing Joist Hangers

Installing Joist Hangers on Opposite Sides of a Double Truss

My friend and loyal reader LONNIE in COLORADO SPRINGS is one Hansen Pole Buildings’ client who truly puts thought into the assembly of his new post frame building.

Lonnie writes:

“I’ve been pondering and pondering this and I may have a solution that I want to run by you. I’m considering buying a Bostitch F21PL framing nailer to use on the project and mainly because it includes a metal connector tip that will allow it to drive the 3” nails through the hangers for the purlins. What I was thinking of doing is to frame each truss bay using 2@ 1 1/2” 10d nails (always making sure to use the same 2 holes for each hanger… i.e. upper left and lower right) to build each bay on the ground. After raising the truss bays, go back and attach the double trusses together and at the same time finish the hangers with two 3” 10d nails in the empty hanger holes. The only concern I had was that the 3” nails would be driven opposing the 1.5” nails on the opposite truss hanger. However, since the nails would be driven point to point I think the odds of the 3” driving the opposing 1.5” out would be very slim. 

Do you think that mix of 1.5” and 3” nails for the connectors would be sufficient or should I really consider just temporarily attach the hangers and replace the temporary attachment with the 3” nails? If that is the case, is there an issue driving 3” nails basically tip to tip through the hangers?

Mike the Pole Barn Guru writes:

Your mix of nails will be more than adequate, as the load carrying capacity of the hanger is greater than the ability of the roof purlin to carry a load. In simple terms – the hanger and its fasteners are not the weak link in the system. Also – if you take two hangers and place them back to back, you will notice the holes do not all line up – whether the variability is accidental or purposeful, I do not know, however it further reduces the probability of nails from opposite directions exactly hitting each other tip-to-tip.

A caution – situations involving a differentiation from what is shown on the actual engineer sealed plans should always be verified for structural adequacy prior to implementation.

 

Construction Tape, Instead of Nails to Build Pole Buildings

Building TapeI’m always on board (pun intended) for new, interesting and different ideas. This one certainly qualifies!

German researchers are working on a quick-setting construction tape which can bond lumber members together. They’ve developed an adhesive tape, which sets in under a minute to reliably and durably bond together individual components.

The construction tape doesn’t dry out, so it can be applied to one member, and does not have to be immediately sealed to other pieces.

The entire process is possible because the adhesive material actually envelops a metal strip which serves as a heating system. When the construction tape is stuck onto a piece of wood, the part contacting the wood warms, allowing it to seep into the wood grains. It then cools, creating a bond. Stick another piece of wood on the other side of the tape, the same process is repeated, and the two pieces are sealed together.

While the process currently takes about a minute, the aim is to speed it up.

Researchers feel they have found the perfect adhesive, but they still are working on finding the ideal metal for the heating strip. Besides brass, scientists are also testing stainless steel and aluminum.

“As the adhesive tape is designed to be used primarily for load-bearing bonding in buildings, it has to possess structural strength and durable adhesive qualities,” says Dr. Andreas Zillessen of WKI (Wilhelm-Klauditz-Institut).

The time frame for real life testing of the product is about six months away.

Imagine – instead of whacking my thumb with a framing hammer, I will now be able to permanently tape my hands together!