Issue link: http://alpine.uberflip.com/i/586848
105 (800) 521-9790 alpineitw.com PRODUCT CODE BOLT DIMENSIONS (INCHES) DIAMETER L ABC1212 1 ⁄2 12 ABC5812 5 ⁄8 12 ABC3412 3 ⁄4 12 ABC-CUSTOM Specify Specify All Thread Rod Screwed Into Nut and Chair ABC (Specify Flat Type) ABC ANCHOR BOLT CHAIRS Design Features… allows the anchor bolt or all-thread rod to be secured before the concrete is poured. The ABC also allows proper alignment of the anchor bolts before wall framing. Anchor bolts will no longer be dislodged by vibrations from power equipment. Material… base 14 ga. steel. Special… various lengths of anchor bolts or all-thread rod are available (specify AB or ATR). Custom sizes of the base are also available. A. Per NDS section 8.1.2.1 bolt holes are to be 1/16 inch larger than bolt diameter. This can cause deflection until the bolt seats in the hole. Increasing the bolt hole diameter will lead to an increase in deflection. Using ADST screw type anchor downs eliminates this potential source of deflection. B. Installation of Anchor Downs on only one side of the stud creates an eccentric condition which at maximum load can cause additional deflection of the post. C. Anchor bolts can loosen especially during the cyclic loads as in earthquakes. Using thread adhesives or nuts with nylon locking inserts can reduce loosening. D. Post bolts installed and not tightened or post bolts which become loose as a result of wood post shrinkage will cause additional deflection under load. Using bearing plates against the wood helps create a stronger connection on the post. Using ADST screw type anchor downs reduces this potential source of deflection. E. Anchor downs which have been subjected to high loads caused by earthquakes or wind may have been deflected causing a loose connection. F. Wood shrinkage at the base of the Anchor Down, sill plates, rim joist, etc. can cause anchor bolts to become loose, which may require retightening. G. Compression forces from normal dead and live loads as well as overturning forces from wind or earthquakes may cause the wood at the post ends, sill plates, etc. to crush resulting in gaps and additional deflection. CAUSES FOR ANCHOR DOWN DEFLECTION: