DDA Handrails: Top and bottom rail DDA instagram

DDA Handrail:
Top and Bottom Rail Diagram

Top & bottom rail DDA diagram

This diagram illustrates building a DDA handrail that has a top and bottom rail. A bottom rail is required when there is no curb on a ramp. Please investigate the drawing below to learn how the different fittings for each assembly go together.

A) Standard upright: The 62-8 base flange is for mounting to level surfaces. The 518-7 connects to 10-848 and 10-840C fitting.

B) Ramp upright: The 67-8 base flange is for angled surfaces. The upright angle is fixed by tightening the set screws. The railings are attached in the same manner as the Standard Upright. The bottom rails are connected with 89-8 on mids and 86-8 on ends.

C) Wall mount: The 570-7 is connected to the wall or wood posts using 1/4" screws or bolts. The 570-7 is attached to the railing with No. 12 self-drilling screws.

D) D Returns:The D-return connects to the post using the 567-7 and 10-848. The 10-848 receives the small end of the 567-7. The 567-7 is then joined to the 520-7 using a 514-7.

E) Adjustable angles: In order to accomplish angles with a smooth surface, use the 554-7 and two 514-7. These are frequently used at the top and bottom of ramps and stairs.

F) Wall returns:The 565-7 wall return flange is connected to the wall or wooden posts with 1/4" screws or bolts. It is then connected to the pipe with a 514-7.

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