Posts Tagged ‘hurricane anchorage’

227 Approaches Dry In

December 18th, 2012


Nestled in the foliage of serene Tidewater Plantation in North Myrtle Beach, work to complete dry in continued on lot 227. This houses cantilevered overhangs served several purposes. They run straight across even with plate level which helps define the freeze boards over top windows. The sub fascia is set at a predetermined height, in this case 2×6. They are energy efficient by allowing high rating R value insulation to travel to the perimeters of the exterior wall. Probably the best feature is the easy of installation of the soffit materials. It is a selling point I put this way to interested clients: “not everyone buys cantilevered overhangs from me, but those that do always reorder them”. Kinda a non confrontational way of gentle persuasion. I had a flash of the “Dos Equis” man (stay thirsty my friends..). Foundation strapping required in this 130 mile per hour wind zone was inlayed into the 7/16″ sheathing. Coastal construction differentiates itself from inland construction by the hurricane anchorage and foundation strapping requirements. Wall panel construction can accommodate these necessary connections just as truss designs are the point of reference for uplift values. Load paths are identified and the correctly sized header members, whether it be LSL,Timberstrand or LVL, are used to transfer the load to the foundation. I talked to the general contractor today about the overall performance of the component system. He commented about consistency being the most beneficial byproduct. When the products arrive, they are ready to be installed with the guess work removed.


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Fit Like A Glove

July 4th, 2012


The roof trusses for Oakpointe 263 arrived late morning on Monday 7/2. Craning them into position on the house was reserved for early morning Tuesday 7/3. I arrived at the site shortly before noon and the trusses were nearly all set, less some of the smaller end jacks and mono trusses, which could easily be set by hand. Another sweltering, muggy Carolina afternoon was enough to take the breath out of someone, everything you touched was hot, yet IG Construction crews bared these elements without a complaint. Obviously the wall sheathing was applied on Monday as the crew did not work over the weekend and who could blame them? With temperatures like this one would be fortunate to get 5 consecutive days of work accomplished, much less the extra day added on. The wimp that I am ran for the protection of the truck’s air condition after twenty minutes. As I have mentioned in previous posts, appropriately bracing roof systems like this one is extremely important to avoid dominoing should a freak wind blow through. There are temporary and permanent braces applied as the trusses are being spaced and secured to one another and to the bearing locations. Clear span roof trusses are not to be attached to interior non-load bearing locations to allow for seasonal constrictions and contractions with the changes in temperature. Conversly, any load bearing walls that are crossed must be picked up by the truss designer. Hurricane anchorage from the truss to the top of the wall it rests on is traced to the foundation below at the bottom of the same wall. Each individual sealed shop drawing lists the uplift forces to be contained. Porch trusses are figured differently than house trusses due to the increased uplift conditions they are exposed to below. In the coastline areas close to the Atlantic Ocean, 130 mile per hour winds are the qualifier to the design criteria followed. Besides the planning of how the engineered roof trusses resist these forces, along with how the role each component plays of the entire structure, assures the truss system to “fit like a glove”.


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