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®
,
Inc.
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p 156
APPENDIX 2F
MODEL SPECIFICATIONS
Chapter 2
Helical Foundation Systems
3.1.17 Load Factor: A factor that accounts for the probability of deviation of the actual load
from the predicted nominal load due to variability of material properties, workmanship,
type of failure and uncertainty in the prediction of the load (Load and Resistance Factor
Design).
3.1.18 Load Test: A process to test the ultimate anchor capacity and relation of applied load to
anchor head movement by application of a known load on the helical anchor head and
monitoring movement over a specific time period.
3.1.19 Loads: Forces that result from the weight of all building materials, occupants and their
possessions, environmental effects, differential movement, and restrained dimensional
changes. Permanent loads are those loads in which variations over time are rare or of
small magnitude. All other loads are variable loads (see also Nominal Loads).
3.1.20 Mechanical Strength: The maximum load or the load at a specified limit state that can
be resisted by the structural elements of a helical anchor.
3.1.21 Net Deflection: The total movement at the anchor head minus the theoretical elastic
deformation of the anchor shaft during a load test.
3.1.22 Nominal Loads: The magnitude of the loads specified, which include dead, live, soil,
wind, snow, rain, flood and earthquakes (also referred to as service loads or working
loads).
3.1.23 Nominal Resistance: The anchor capacity at a specified ultimate limit state (Load and
Resistance Factor Design). See Ultimate Anchor Capacity.
3.1.24 Nominal Strength: A term used in structural design which is defined as the structure or
member capacity at a specified strength limit state. See Ultimate Anchor Capacity.
3.1.25 Resistance Factor: A factor that accounts for the probability of deviation of the actual
resistance (strength) from the predicted nominal resistance (strength) due to variability
of material properties, workmanship, type of failure and uncertainties in the analysis
(Load and Resistance Factor Design).
3.1.26 Service Loads: See “Nominal Loads” above.
3.1.27 Ultimate Anchor Capacity: The helical anchor capacity based on the least capacity
determined from applicable ultimate limit states for mechanical and geotechnical
capacity.
4
APPROVED HELICAL ANCHOR MANUFACTURERS
4.1 Foundation Supportworks
®
, Inc., 12330 Cary Circle, Omaha, NE 68128; Phone: (800) 281-8545;
Fax: (402) 393-4002.
4.2 Due to the special requirements for design and manufacturing of helical anchors, the anchors
shall be obtained from Foundation Supportworks
®
, Inc., or other qualified manufacturer with an
approved equivalent product. A request to substitute any other manufactured helical product
must be submitted to the Owner for review not less than seven (7) calendar days prior to the bid
date. The request must include: