STRUCTURAL DESIGN - WALKTHROUGH

STRUCTURAL DESIGN - WALKTHROUGH

Design

This is an example walk through of completing the structural/roof data collection and  layout design.

1 | DATA COLLECTION

HOW AND WHY

It is important complete your data collection and plan the design on paper either via notes on your PC or by hand on a note pad. It is important to remember that BASELINE is a set of design tools. You need to collect data and plan your design before you fill out this tool. If you do not do this, then instead of you commanding the tool, the tool will command you; only, the tool doesn't know all the variables to look out for.

OPEN THE STRUCTURAL PHOTOS

When scrolling to the structural photos, the first run through will be a brief review looking for potential show stoppers such as:

1. Structural damage in the attic that may warrant a PSR

2. Conventional framing that appears to be over spanned:

   • Look for conventional framing that is rafters only with no additional supports, especially when it is 2x4 rafters, this could likely be over spanned.

   • Also look for larger rafters such as 2x6 to 2x8 that are running excessive distances with no additional supports (9+ feet).

3. Roof sections that will require special consideration such as Horizontal Box Trusses

4. On older homes, look closely at the insulation. Ensure it is not vermiculite/asbestos insulation.

ATTIC CONDITION

First, we'll note that the attic is constructed using Manufactured Wood Trusses. The condition of the attic appears to be fairly new, possibly a new build so we won't need to scrutinize the structural integrity as much as we would with an older home. Note the following:

• Foil insulation present on the sheathing layer indicates that this will most likely be OSB. We are at liberty to input it as such

• There are sections that have horizontal box trusses, extra attention will be needed to ensure the correct mounting callouts for these areas. This will also mean that this is a hip roof shape.

STRUCTURAL SIZE AND SPACING

Most trusses are 2x4 @24" o.c. but we should still double check to be safe.