MIL-HDBK-1032/2
Static Load. Floors shall be designed to support the estimated
3.6.1.6
static load of stored material and storage equipment. Refer to Appendix D of
NAVSUP PUB-529 for static floor load estimating criteria.
Impact Load. Floor design shall incorporate the effects of Impact
3.6.1.7
loads caused by operation of materials handling equipment. Consult equipment
manufacturers for characteristics of specific vehicle impact loads.
Superflat Floors. High rise, narrow aisle storage systems with
3.6.2
aisles less than 96 Inches (2440 mm) wide and storage heights exceeding 20
feet (6100 mm) require extremely smooth and flat floors to control operating
Superflat floors shall be designed and specified for vehicles
tolerances.
such as turret trucks and man-up order picking trucks.
Construction Guidelines. In order to assure that superflat
3.6.2.1
tolerances can be achieved, the following design and construction guidelines
shall be followed:
a) Clearly identify on the design drawings those areas of the
warehouse floor which must meet superflat tolerances.
b) Incorporate a requirement in the construction contract for test
slabs to assure that the superflat floor tolerances can be achieved with the
contractor's proposed operations.
c) All longitudinal construction joints shall be located outside
of the aisles in which the trucks operate. Space transverse weakened plane
joints to control random cracking and potential slab warping. A transverse
joint spacing of 20 feet (6100 mm) will generally be satisfactory.
Transverse joints shall be sawed and sealed.
d) Locate floor drains, cleanouts, conduits, and other floor
discontinuities outside of the aisles.
e) Specify a concrete mix having a low water-cement ratio and low
shrinkage characteristics. Achieve concrete workability through use of
plasticizers in lieu of additional water.
f) During construction, pour concrete between rigid forms in lanes
less than 20 feet (6100 mm) wide. Strike off concrete with a vibrating
screed.
g) After initial floating, use a 10 foot (3050 mm) long transverse
scraping straightedge (highway straightedge) to remove high spots.
h) Check the surface of the plastic concrete frequently with a 10
foot (3050 mm) long straightedge placed both parallel and transverse to the
centerline.
Correct any high spots and fill any low spots using the highway
straightedge.
Measurement. New criteria for tolerances and measurement of
3.6.2.2
superflat floors are currently under development. The following requirements
are provided as interim guidance:
a) In specifying floor flatness for turret truck and order-picking
truck operations, require a complete (100%) profile analysis of the wheel
path portion of the concrete floor in the storage aisles and a statistical
profile analysis of other portions of the concrete floor on which turret
trucks and order-picking trucks will operate.
44
Previous Page
