The official Pad Spec 1570 CBU can be found here. Download PDF for printable version.

CONCRETE FOUNDATION PREPARATION

vital™ cluster box unit - 1570 "F" Series

CONCRETE FOUNDATION PREPARATION

vital™ cluster box unit - 1570 "F" Series

NEW CONCRETE BASE:
  • 1)Depending on climatic and soil conditions in the area of installation, optional foundation material may be necessary as shown. Consult local building codes for recommendations.
  • 2)Refer to Table1 for thickness (h), width (w), and depth (d) of the concrete pad alternatives.
  • 3)Concrete shall have a compressive strength of 3000 psi @ 28 days, contain 4% min ~ 6% max air entrapment and be placed with a 3.50~4.50 slump in accordance to 301.
  • 4)Use wire mesh as per (Standard) or fier reinforced concrete as per (Standard).
EXISTING CONCRETE BASE:
  • 1)Existing concrete pad must be at least 48" wide.
  • 2)Concrete base and anchor bolts may be reused if:
    • existing ½" diameter expansion anchor bolts are fimly embedded in the concrete and not damaged or corroded;
    • concrete foundation is not damaged; and
    • bolt hole pattern of the new unit matches the installed anchor bolts.
  • 3)Additional considerations include:
    • if concrete is only 4" thick, then option 'b' in Table 2 below cannot be used
    • any unused, existing anchor bolts must be cut flsh to the level of the concrete surface
    • if concrete is damaged, replacement of foundation pad is required

TABLE 1: Pad Recommendations

h (Thickness) w (Width) min w (Depth) min
4" 47" 47"
5" 44" 44"
6" 42" 42"
7" 40" 40"
8" 39" 39"

TABLE 2:

Expansion Anchor Bolt Recommendations
a. Hilti Bolt II

- 1/2 inch diameter x 5 1/2 inches overall length

- Galvanized

- KB II 12-512, Stainless steel

Mininum embedment in concrete must be at least 3 1/2 inches
b. ITW Ramset Redhead Turbolt

- 1/2 inch diameter x 7 inches overall length

- Galvanized

Mininum embedment in concrete must be at least 4 1/8 inches
c. Rawl Stud

- 1/2 inch diameter x 5 1/2 inches overall length

- Galvanized

Mininum embedment in concrete must be at least 4 inches