4.3　Anchor Bolts

4.3.1　The anchor bolts installed in the preformed holes shall be in accordance with the following requirements:

1　Before installation，the specifications of the anchor bolts and the integrity of the screw threads there of shall be checked；moreover，oil contamination and scales on the anchor bolts shall be eliminated.

2　The anchor bolts shall be vertical and not oblique in the preformed holes.Any part of the anchor bolt shall be kept from the hole wall by larger than 15mm and shall not be contacted with the bottom of the hole.

3　Casting of concrete in the preformed holes shall meet relevant requirements of the design documents or the current national standard GB 50204 Code for acceptance of constructional quality of concrete structures.

4　The anchor bolts shall be fastened after the concrete in the preformed holes reaches 75% of the design strength.

5　After the equipment is primary aligned and leveled，there should be gaps between the anchor bolts and the bolt holes of the equipment.

4.3.2　Installation of T-head anchor bolts shall be in accordance with the following requirements:

1　T-head anchor bolts shall be matched with the foundation plates（anchor plates）according to their specifications，and the specifications thereof shall meet relevant requirements of the current national and industrial standards JB/ZQ 4362 T-head Anchor Bolts and JB/ZQ 4172 Single hole anchor plate for T-head anchor bolt.

2　The foundation plates（anchor plates）shall be arranged firmly，evenly and straightly.

3　Before the equipment is put in place，test penetrating of the T-head anchor bolts shall be conducted；moreover，marks for the T-head directions shall be made.

4　The unthreaded portions of the anchor bolts and the foundation plates（anchor plates）shall be coated according to the requirements of the design document.Antirust paint shall be coated for 1-2 rounds when there is no requirement in the design document.

5　After the equipment is installed and the T-head anchor bolts are fastened completely，the sealing fillers in the preformed holes shall meet the requirements of the design document.

4.3.3　For placing the gasket，the thick and thin nuts of double-nut anti-loose anchor bolts of different thicknesses，the sequence shall be that the gasket，the thin nut and then the thick nut on the top.

4.3.4　Installation of cinch bolts shall meet the requirements of the design document.Relevant requirements of the current national standard GB 50231 General Code for Construction and Acceptance of Mechanical Equipment Installation Engineering shall be met when there is no requirement in the design document.