19 Miss. Code. R. 7-5.06.4

Current through December 10, 2024

Section 19-7-5.06.4 - Soil Classification

The following soil classifications in Table I have been adopted for the purpose of determining design loads, specifications and holding power of anchors and tie-down devices.

Table I Soil Classification

Soil Class	Types of Soils	Blow Count (ASTM)	Test Probe (1) Torque Value (2)
I	Sound hard rock; Very dense and/or cemented ....	N/A	N/A
II	Sands, coarse gravel and cobles, preloaded silts, clays and corals...	40 and up	More than 550 lbs. - in.
III	Medium-dense coarse, sands, sandy gravel, very stiff silts and clays....	24-39	350-549 lbs. - in.
IV(4)	Loose to medium dense sands, firm to stiff clays and silts, alluvian fill.....	(3) 14-23	(3) 200-349 lbs. - in.
V	Peat, organic silt, inundated silts, loose fine sand, alluvium, loess, varied clays, fill, fly ash....	0-14	0-200 lbs. - in.

1. The test probe is a device for measuring the torque of soils to assist in evaluating the holding capacity of the soils in which the anchor is placed. The test probe has a helix on it. The overall length of the helical section is 10.75 inches; the major diameter is 1.25 inches, the minor diameter is 0.81 inches; the pitch is 1.75 inches. The shaft must be of suitable length for anchor depth.

2. A measure synonymous with the moment of a force when distributed around the shaft of the test probe.

3. Below these values a registered professional engineer must be consulted.

4. A C-4 anchor must be used unless the soil is tested with a soil test probe and the readings allow for another soil type anchor to be used.

19 Miss. Code. R. 7-5.06.4

Miss. Code Ann. §§ 75-49-1, et seq.; 75-49-11 (Supp. 2015).

Adopted 1/1/2015

Amended 10/1/2016