Tie Down Vector Dynamics Foundation System for Wind Zones IBC 2009 - Manual (Page 15)

Page 15 4/3/2013
VECTOR DYNAMICS INSTALLATION DESIGN INSTRUCTIONS
Vector Dynamic Foundation Systems may be used only on homes set on soils classified as Class 2, 3, 4A and 4B as
described in the table below:
SOIL CLASSIFICATIONS
Soil Class Types of Soils Blow Count (ASTM Soil Test Probe (1)
D2586) Torque Value (2)
1 Sound hard rock...... NA NA
Very dense and/or 40-up More than 550 lbs - in.
cemented sands, coarse
2 gravel and cobbles,
preloaded silts, clays,
and coral’s
Medium-dense coarse 24-39 350-549 lbs - in.
3 sands, sandy gravels, very
stiff silts and clays
4A Loose to medium dense 14-23 275-349 lbs - in.
sands, firm to stiff clays
4B and silts, alluvian fill 175-275 lbs - in
Peat, organic silts, 0-44 175 lbs - in.
5 inundated silts, loose fine and lower
sand, alluvium, loess,
varied clays, fill, fly ash.
(1) The purpose of the soil test probe is to gauge the strength of the soil below the surface and near the anchor’s
helical plate. The strength of the soil is estimated in terms of its resistance to penetration (flow) under load by
means of the torque probe and is measured in lb-in. The test probe has a helix on it. The overall length of the
helical Section is 10.75 in.; the major diameter is 1.25 in.; the minor diameter is 0.81 in.; the pitch is 1.75 in
The shaft must be of suitable length for anchor depth.
(2) A measure synonymous with moment of a force when distributed around the shaft of the test probe.
Vector Foundation Pads Equivalent to Footer Pads*
Footer Size:
16x16 = 256 sq. in.
or 16x18 = 288 sq. in.
EQUALS
1 Vector Pad # 59310
Footer Size:
20x20 = 400 sq. in.
or 17x25=425 sq. in.
EQUALS
1-Vector Pad # 59271
432 sq. in.
Vector Pad(s) exceed the surface area required when used as the equivalent listed above.
*Foundations in soil with a bearing capacity of less than 1,000 PSF must be designed by a Registered Professional Engineer familiar with site conditions