Tie Down Vector Dynamics Foundation System for Wind Zones lll - Manual (Page 2)

Introduction
These instructions describe the proper use of the lateral and longitudinal foundation system. You may also refer to the
home manufacturer’s installation manuals that include the Vector Dynamics system as an alternate foundation system.
General
The Vector Dynamics Foundation System resists lateral & longitudinal wind loads by anchoring the two longitudinal
main rails. The system is approved to be used on single or multi section homes:
• Nominally 12 feet to 16 feet wide- (single section) with main rail spacing of 95 inches or greater on center;
multi section main rail spacing of 75 inches or greater on center.
• Nominal 8 foot or less top plate height at sidewalls with main rail depth of 12” or less.
• Maximum roof slope of 20 degrees (4.4” in 12” slope).
• Additional systems may be needed for roof slopes greater than 20 degrees, 4.37” in 12” pitch. See page 4.
• Maximum eaves width (roof overhang of sidewall) of 12” for Zone I, 8” for Zone II and 6” for Zone III.
The Vector Dynamics Foundation System has not been designed for use on exposure “D” homes within 1500 feet of the
coastline. Additional vertical anchor ties that are unique to a home’s design may be required by the home manufacturer.
These locations may include shear walls, marriage line ridge beam support posts, end frame ties and rim plates.
GENERAL INSTALLATION INSTRUCTIONS
Site Preparation
It is necessary that the home site be properly graded and sloped to prevent water and moisture from standing or flowing
beneath the home.
Footings and Frost Lines
The Vector Dynamics Foundation System was designed to be placed directly on top of the ground (or poured concrete)
after clearing all loose vegetation. In areas with frost heave, use Vector for Poured Concrete and check with local
requirements for footer depth.
Foundation/Footing Specification for Vector Pads
Vector Pads are used in place of conventional foundation pads. Vector pad sizes provide two or three square feet of
bearing support. Vector Systems should be spaced as symmetrically as possible along the length of the home. For pier
locations in between the Vector Systems, use the normal foundation pads.
Compression Strut
To cut lumber (2 - 2x4’s or 1 - 4x4 per Vector system) for the center compression section, when using concrete
blocks for piers, measure center to center frame (I-beam) distance and subtract 16”. 3-1/2” or 4” nominal schedule 40
PVC pipe meeting ASTM D1784 or Tie Down’s steel compression struts may be substituted for lumber as the center
compression strut under certain conditions described above. Pipe adapter bracket, part #59281 must be used with PVC
pipe simultaneously with the Inside Tie Brackets. The pipe adapter bracket is used on top of the pipe and under the Inside
Tie Bracket.
2 Revised: 8/19/2008