FEMA P55 Coastal Construction Manual, Fourth Edition - Mad Cad

Volume II CONSTRUCTING THE BUILDING 13
Table 13-3. Roof Frame Inspection Points
Inspection Point Reason
1. Roof framing attachment to
walls
Only material that is rated and specified for the expected use and environmental conditions should
be used.
Builders should understand that the weakest connections fail first and that it is therefore critical to
pay attention to every connection. The concept of continuous load path must be considered for every
connection in the structure.
Exposed steel in the structural frame corrodes even in places such as the attic space. The builder should
plan for it by installing hot-dipped galvanized or stainless steel hardware and nails.
Compliance with suggested nailing schedules for roof, wall, and floor sheathing is very important.
13.3 Building Envelope
The building envelope comprises the exterior doors, windows, skylights, non-load-bearing walls, wall
coverings, soffits, roof systems, and attic vents. The floor is also considered a part of the envelope in buildings
elevated on open foundations. Building envelope design is discussed in detail in Chapter 11. The key to
successful building envelope construction is having a detailed plan that is followed carefully by the builder,
as described below.
A suitable design must be provided that is sufficiently specified and detailed to allow the builder to
understand the design intent and to give the contractor adequate and clear guidance. Lack of sufficient and
clear design guidance regarding the building envelope is common. If necessary, the contractor should seek
additional guidance from the design professional or be responsible for providing design services in addition
to constructing the building.
COASTAL CONSTRUCTION MANUAL
Ensures that the sufficient number, size, and type of nails are used in
the proper connector
2. Size and location of openings Ensures performance of roof as a diaphragm
3. “H” clips or roof frame
blocking
4. Sheathing nailing – number,
spacing, depth of nails
5. Material storage – protection
from elements prior to
installation
6. Rafter or ceiling joist material
– excessive crown or lateral
warping
7. Gable-end bracing
Ensures that there is support for edges of the sheathing material
Ensures that sheathing acts as a shear diaphragm and is able to resist
uplift
Ensures that the wood does not absorb too much moisture prior to
installation—exposure promotes checks and splits in wood, warp, and
separation in plywood
Maintains level ceilings
Ensures that bracing conforms to design requirements and
specifications
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