Shed on a steep slope

This project received 16 bids from talented freelancers with an average bid price of $618 AUD.

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Project Budget
$250 - $750 AUD
Total Bids
Project Description

I have designed a tiny building/shed (only 13 square meter) which is sited on a steep slope (approx 30 degree) in country Victoria (Australia).

This building is to be partially dug into the hill, and therefore requires an approx 2 meter tall retaining wall, which also at the same time acts as the walls on two sides of the building. The other sides of the building contain large feature windows on both sides of a large central column supporting the very heavy roof, which will be covered with soil and grass, so that the building will almost be invisible from the top of the slope.

The shed/building will only be large enough for a Queen size bed, a desk and a wood heater.

I need a very cost-effective engineering solutions, as I will be building the structure myself on the weekends. Due to the inaccessibility of the site all material needs to be carried by hand to the site.

Specifically I need engineering drawings and specifications for:

1. Retaining wall / house wall solution - this retaining wall also acts as a strong house wall, so will need drainage system, geotech membranes, insulation etc I imagine it may require being built using concrete blocks reinforced with steel rods

2. Retaining wall system to secure slope a) adjacent and b) downslope of the house (perhaps these could let water through?)

[url removed, login to view] and Specification of reinforced concrete slab that will support the heavy load of the grass roof and building in general. This concrete slab is also part of the retaining wall system.

4. Wall and column design and specifications including the large feature windows (which envelope the corner of the building) - I imagine the design may require a steel column? or laminated timber columns? what size, dimensions, design etc.

Lintel designs/specs for windows and the one door is also required.

4. Design of Roof structure. i envisage second hand timber as rafters. The roof eaves should protrude by 70 cm on the two high sides of the building.

Please also design/advise suitable angle of grass roof.

NB: the inside dimensions (foot print) of the building is basically only 3 m x 4m + a little equilateral triangle (the sides of which all measure approx 2m). So very small. The roof eaves should protrude by 70 cm on the two high sides of the building.

Any excess water from roof will be captured in rain water tanks. there is no need for plumbing but the house will have mains electricity.

The site is only 15m wide, has many old/small fruittrees on it -it also has very basic (and unsatisfactory) low retaining walls of 50-60cm heights which have deteriorated.

Please also address any engineering problems I may have overlooked.

photos of a small wooden model are attached.

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