Messages and Online Forum Q&A

Re: remodeling/addition

From: info@builderswebsource.com
Category: Architecture and Building Design
Remote Name: 63.198.181.43
Date: 17 Jan 2001
Time: 08:39 PM

Comments

Without knowing more about the structural aspects of the existing slab foundation and footings as well as the weight of the proposed addition, we cannot comment on the structural suitability of the existing slab.

There are several considerations when adding an addition that could impact the foundation design. Some of these include:

1) Weight of the proposed structure and location of load-bearing supports;

2) Seismic, wind or hurricane design factors, which may dictate mechanical strapping and shear wall requirements;

3) Existing soil type and conditions as well as the load-bearing properties of the soil;

4) Depth of the perimeter footings and compliance with building codes for two-story dwellings.

Once these factors are known and understood, a proper foundation can be engineered. Generally, a structural slab can readily handle a two-story dwelling so you should be able to continue your project with the addition of more slab. However, reinforcement of the existing foundation may be required if the original design was for a single floor only.

Since the house is new, there should be blueprints available. Any structural engineer can readily assess what changes, if any, will be required to support the new structure. The licensed engineer should also help with the load calculations for critical beams and load-bearing walls and posts.

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