Materials....Skate Ramp Structure
Ramp frames are manufactured using Treated CLS Timber (L)2400 x (W)63 x (T)38mm, and are boxed in using 18mm WBP Exterior Plywood. Transitions on half pipes, quarter pipes, etc are manufactured using Treated CLS Timber (L)2400 x (W)89 x (T)38mm. Skate Ramp Finish All frames to be twice coated with wood preserver, and once coated with Polyurethane alkyd resin Handrails Handrails are manufactured using 30 x 30 x 2.5mm square steel hollow section for the frame with 16mm round solid bar welded vertically to the frame with 100mm centres. Handrail Finish All handrails to be shotblasted, zinc rich primed, then a finish coating by way of polyester powder coating. Skate Ramp Surface Ramp surface is manufactured from 2x6mm thick treated plywood sheet that is screwed then bonded to the wooden frame to provide a continuous riding surface. Optional surface of 1mm thick coated steel sheet can be used as a surface at an extra cost. Ramp Coping The Ramp coping is made of 50mm o/d aluminium tubing with a 5mm wall |
Skate Ramp Sound Proofing
Revolution Ramps optional sound proofing is achieved by applying Spray Insulation foam to the underside of the ramps. This helps reduce vibrations caused by skaters on the ramps. Reducing the vibration associated with the activity on the ramp in turn helps to reduce noise. Sprayed on insulation can also help to dampen the level of the impact sound produced as the skater lands on the ramp. A detailed survey and monitoring of the activity recorded a peak reading of 96dB upon impact by the skaters. After applying sound absorbing spray foam a peak reading measured a SPL of 86dB with over six times the amount of activity by the skaters. The measurement of 10dB difference represents a reduction of half the sound energy. Spray foam insulation has the following advantages over other sound proofing methods: More efficient and a better fit than cutting foam-boards Provides strength and sound-insulation and cuts out unwanted air leakage Being physically attached to the wooded/metal surface the material dampens the reverberation after an impact. The sprayed application which penetrates all nooks and crannies coupled with 25 fold expansion of the foam ensures that all potential air gaps are plugged minimising airborne sound transmission from the underside of the ramp and surrounding enclosure. The sound absorption properties of the foam in conjunction with the above effects served to reduce measured sound levels in the vicinity of the ramps by at least 10dB. Due to the logarithmic nature of the scale this represents a 50% diminution in sound energy. |