D.
The grating must be removable to allow access to sump and sump pump (if
installed) for cleanout and maintenance operations.
2.12 GRATING SUPPORTS
A.
B.
Grating shall be supported on all sides by channel or angle members of the same
material as the grating. Supports shall be securely anchored to the sides of the
floor slab. All anchor hardware shall be stainless steel.
Grating shall be secured to their supports by removable anchors.
PART 3 - EXECUTION
3.1 BATCHING AND MIXING
A.
B.
Batching
1. Conform to ACI304.
2. Use only approved materials.
Mixing and Delivering - Conform to ASTM C94.
3.2 PLACING CONCRETE
A.
B.
G.
H.
Conform to ACI 304.
Forms shall be substantially free from surface defects and sufficiently tight to
prevent leakage of mortar. They shall be properly braced and tied so as to
maintain position and shape during and after placing of concrete.
CONTRACTOR shall furnish and place reinforcing steel and wire, pipe boots,
expansion joints, sump, grating shelf, etc. as shown on the Drawings.
All concrete shall be thoroughly consolidated by use of vibrators.
No concrete shall be deposited under water without written permission of
ENGINEER, and then only in accordance with proper tremie techniques.
Cold Weather Concreting - Conform to ACI 306.
Hot Weather Concreting - Conform to ACI 305.
Sideslope riser building floor and floor sump as indicated on the Drawings.
3.3. FINISHING
A.
All formed concrete surfaces to be exposed shall be given a rubbed finish.
File No. 3066.09 Cast-in-Place Concrete 03300 - 4 of 6 December 2017
