Installation Best Practices

Question: 

I am looking for strongback bracing requirements for a 12 in. deep residential floor system with trusses in lengths up to 19 ft. Can the strongback bracing end at a truss without tying into an end wall? For instance, can three trusses of a type be tied together by strongbacks, then the next series of different trusses be tied together without having to be tied back to the previous type of trusses?

Question: 

What is the correct method of attaching scissors trusses to the top plate? I read recently in a trade magazine that this type of truss should be toe-nailed on one end and attached with slotted clips on the other end. According to the article, this is to allow for movement of the truss. We require PE stamped spec sheets from the truss manufacturer to verify trusses meet wind and snow loads. These sheets give bracing requirements but never give recommended attachment requirements.

Question: 

I am trying to develop a guideline for my firefighters regarding initial fire attack in buildings with light-weight trusses. My concern is truss failure, especially when exposed to fire. Is there any information on failure time related to flame impingement? Any information about truss failure – especially in a fire condition would be helpful.

Question: 

I have mono trusses on either side of a firewall. I have the fire rating/wall material between them. Can I place a ridge vent above these two? Or should I use vents? How do I calculate the appropriate vent sizes and styles?

Question: 

Does the NFPA sprinkler standard address sprinkler loading? If so, how and where do I buy it? What other information do you have on sprinkler loading? How do other truss companies price jobs for sprinkler loading the plans do not include a sprinkler layout or even say what size/type of sprinkler system will be used?

Question: 

What are the requirements on the permanent bracing of bottom chords? Can gypsum board diaphragms be used?

SBCA has developed an online series of best practice design and installation guides on a wide variety of topics.

 

The worth of one’s efforts is sometimes a difficult thing to communicate to others, whether they be customers, employees or, in SBCA’s case, members. It helps to have a concrete example that illustrates the value your work provides.

 

Thank you to everyone who took time to comment on the new look and feel of the January/February issue of SBC Magazine.

  • CMs engaged in NFC membership de-velopment efforts will find their work rewarded with better organized, safer, more effective and more reliable framing crews.
  • Framers engaged in NFC will learn component installation best practices from other framers, with the goal of creating more efficient, safe and profitable framing outcomes.
  • By actively growing awareness of and membership in NFC, CMs will expand their framing community connections and naturally expand market share and revenue growth.