3.3　Anchor Bolts

3.3.1　The installation of anchor bolts with preformed holes shall be in compliance with the following requirements:

1　Before installation，oil stain and oxide scales on anchor bolts shall be removed，and threads shall be coated with grease；

2　Anchor bolts shall be vertical in performed holes，the distance of any one part from hole walls shall be larger than 15mm，and any one part shall not contact hole bottoms；

3　Grouting of reserved anchor bolt holes shall meet the requirements of design documents and Code for Construction and Acceptance of Mechanical Equipment Installation Work GB 50231 as the current national standard；

4　The anchor bolts can be fastened only after the strength of grouting concrete in performed holes shall reach 75% of design strength，and the fastening force of each bolt shall be uniform；

5　Contact between nuts and gaskets and between gaskets and equipment shall be tight.

3.3.2　The installation of built-in anchor bolts shall be in compliance with the following requirements:

1　Before the installation of equipment，the positions and sizes of built-in anchor bolts shall be checked in accordance with the actual positions and sizes of bolt holes of equipment base；

2　Parts of anchor bolts，exposed out of the foundation shall be vertical，equipment base shall have adjustment margin when sleeved in the anchor bolts，and each anchor bolt shall not be jammed.

3.3.3　The installation of anchor bolts with T-shaped heads shall be in compliance with the following requirements:

1　Anchor bolts with T-shaped heads and anchor plate shall be matched in accordance with design documents.

2　Before equipment is in position，trial fitting of anchor bolts with T-shaped heads shall be performed，and the directions of T-shaped heads shall be marked.During installation，T-shaped heads shall be correctly embedded into the rectangular groove of the anchor plate.

3　Parts of anchor bolts，which do not have threads and the anchor plate shall be coated in accordance with design documents.When design does not have requirements，rust-proof paint shall be coated.

4　Sealed fillers shall be packed in the performed holes or protective pipe in accordance with design documents before secondary grouting.

3.3.4　The fastening of anchor bolts with requirements on fastening force shall meet the requirements of design documents，and after being fastened，bolts shall expose nuts or shall be level with nuts.