A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
A substrate for child playground surfaces, or a growing medium for grass in soft fall areas of child playground surfaces, is made of a mixture of between about 30% and about 75% of well composted plant materials, between 0% and about 50% of soil, sand or minerals, and between about 20% and about 40% of rubber having a size not in excess of about 7 mm.
A substrate for child playground surfaces, or a growing medium for grass in soft fall areas of child playground surfaces, is made of a mixture of between about 30% and about 75% of well composted plant materials, between 0% and about 50% of soil, sand or minerals, and between about 20% and about 40% of rubber having a size not in excess of about 7 mm.
SUBSTRATE FOR PLAYGROUND SURFACES
LAYT TODD (author)
2015-09-24
Patent
Electronic Resource
English
| Online Contents | 1994
Resilient Playground Surfaces - Choices for U.S. Playground Administrators
| British Library Conference Proceedings | 1995