MIL-HDBK-1001/SA
Section 14: PLAZA WATERPROOFING
14.1 System Description. Since it is impossible to keep all the water out all the time, the basic plaza waterproofing system must be designed to excrete water that does get in, without
damage to the interior spaces below.
14.1.1 Options. Plaza waterproofing basic membrane options include hot-applied built-up roof membrane, elastomeric sheet, and liquid-applied waterproofing.
14.1.2 Materials. Of the three basic membrane types, the hot applied built-up bituminous offers the most advantages:D
a) Multiple lines of waterproofing defense (via alternating layers of felt and bitumen);
b) Adaptability to hot-applied protection boards;
c) Excellent adhesion to concrete substrates;
d) Familiarity to waterproofing mechanics;
e) Known performance criteria.
14.2 Planters. Planters are notorious for leakage. Whether precast or poured-in-place, they should not interrupt the main deck waterproofing. If poured-in-place planters are selected, they must be handled as a perimeter flashing. Precast planters are recommended. Never locate a planter across an expansion joint.
14.3 General Requirements
14.3.1 Minimum Slope. Provide minimum 1/4 inch per foot (2 percent) slope, built into base slab (1/2 inch per foot (4 percent) is preferred). Do not rely on additional fills to provide slope. Provide crickets between drains at perimeter walls.
14.3.2 Joint Construction. Specify all joint construction with "watershed" concept in base slab (refer to ASTM C 981). These raised sections keep water freely drained from these very critical areas. All perimeter construction and expansion joints should be provided with appropriately shaped preformed joint formers flashed into adjoining membrane.
S4
For Parts Inquires call Parts Hangar, Inc (727) 493-0744
© Copyright 2015 Integrated Publishing, Inc.
A Service Disabled Veteran Owned Small Business