3619 COLBY AVE 2019-01-28 - Laserfiche WebLink

• 1/31/2015 However, where an extension-creates difficulty for entry to the ramp, no extension might be justified. Often the railings terminate at the ramp termination. • Enclosed sides (Guards) are required for sections of the ramp over 30" above the ground or other lower surface. The sides must be enclosed with openings less than 4". o If ramp is over 30" high, use two horizontal 5/4x6" deck boards or vertical balusters(must be enclosed with openings less than 4"). o Some building inspectors object to a "ladder"type of enclosed side that consists of horizontal boards. o Four balusters can be ripped from a 2x6 for less cost than the ready-made balusters if acceptable to the client. • Toe Board —use 2x4 mounted 3 '/2" above decking • Use 5'x8' landing for 180 degree turnaround (see Figure 1, 180° Landing Detail drawing) o When the handrail is attached to a post that extends above the handrail, a 2x4 spacer is placed between the post and the handrail to allow room for a finger hold. It is recommended that the 2x4 extend all the way to the ground as shown in Figure 1. • Use 5'x5' landing (inside offset)for 90 degree turn (see Figure 2, 90° Landing Detail drawing) • A 5' long level ramp section or landing is required after each continuous 30' of ramp length or 30" of ramp rise. • Vary joint locations of stringers, railing members and toe boards for improved stability • Hold downs are sometimes required by local codes for wind loading. If required, one approach is to use 12-15" earthen hold downs(not dog-screw types) and cable from the eyelet to each section of the ramp. If the ramp is constructed over concrete, Tapcon screws holding metal plates can be used, • An End Post Bracket is used to support the two end posts. This is fabricated from steel angle iron and plates as shown in the drawing in Figures 3 and 4, Handicap Ramp Termination drawings • A Ramp End Assembly is constructed from wood as shown in the drawings. This may either be fabricated in advance or on site. The structure is screwed together from the bottom and attached to the end posts with screws through the 2x4 toe board. A3/4"plywood base may be required under the End Post Bracket and Ramp End Assembly to stabilize it on the ground. (see Figures 3 and 4, Handicap Ramp Termination drawings and Appendix A.) It is very desirable to terminate the ramp at an even surface so the tapered edge of the last deck board is tight against the ground. When terminating on uneven concrete, consider fastening the end board down with a Tapcon screw into the concrete. • Building codes are followed (see Figure 5, Cedar Rapids building code handout) • Each installation requires site assessment and a specific design developed • A great deal of time may be saved at the construction site by developing an accurate bill of materials in advance. • It is also very helpful to create a "cut list"which includes each board and its length, and where the board will be used in the construction. Figures: 1. 180° Landing Detail Al-5. Stringer Cuts 2. 90° Landing Detail A6-12. Terminal decking construction 3. Ramp Bottom Termination Assembly Bl. Handrail Profile 4. Ramp Bottom Termination Detail Cl. Stair Design Example 5. Cedar Rapids Building Code Handout D1-5. Skirting 6-10. Photos of typical ramps E1-5. Jig photos Appendices: A. Ramp Termination Construction Guidelines B. Vertical Handrail Construction Guidelines C. Stair Design Guidelines D. Skirting Installation Guidelines E. Jigs used in construction